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CY15B128J 128-kbit (16k 8) automotive serial (i 2 c) f-ram cypress semiconductor corporation ? 198 champion court ? san jose , ca 95134-1709 ? 408-943-2600 document number: 001-90872 rev. *g revised january 13, 2016 128-kbit (16k 8) automotive serial (i 2 c) f-ram features 128-kbit ferroelectric random access memory (f-ram) logically organized as 16k 8 ? high-endurance 100 trillion (10 14 ) read/writes ? 151-year data retention (see the data retention and endurance table) ? nodelay? writes ? advanced high-reliability ferroelectric process fast two-wire serial interface (i 2 c) ? up to 3.4-mhz frequency [1] ? direct hardware replacement for serial eeprom ? supports legacy timings for 100 khz and 400 khz device id ? manufacturer id and product id low power consumption ? 175- ? a active current at 100 khz ? 150- ? a standby current ? 8- ? a sleep mode current low-voltage operation: v dd = 2.0 v to 3.6 v automotive-a temperature: ?40 ? c to +85 ? c 8-pin small outline integrated circuit (soic) package restriction of hazardous substances (rohs) compliant functional description the CY15B128J is a 128-kbit nonvolatile memory employing an advanced ferroelectric process. an f-ram is nonvolatile and performs reads and writes similar to a ram. it provides reliable data retention for 151 years while eliminating the complexities, overhead, and system-level re liability problems caused by eeprom and other nonvo latile memories. unlike eeprom, the CY15B128J performs write operations at bus speed. no write delays are incurred. data is written to the memory array immediately af ter each byte is successfully transferred to the device. the next bus cycle can commence without the need for data polling. in addition, the product offers substantial write endurance co mpared with other nonvolatile memories. f-ram also exhibits much lower power during writes than eeprom because write operations do not require an internally elevated power supply voltage for write circuits. the CY15B128J is capable of supporting 10 14 read/write cycles, or 100 million times more write cycles than eeprom. these capabilities make the CY15B128J ideal for nonvolatile memory applications, requirin g frequent or rapid writes. examples range from data loggin g, where the number of write cycles may be critical, to demanding industrial controls where the long write time of eeprom can cause data loss. the combination of features allows more frequent data writing with less overhead for the system. the CY15B128J provides substantial benefits to users of serial eeprom as a hardware drop-in replacement. the device incorporates a read-only device id that allows the host to determine the manufacturer, product density, and product revision. the device specific ations are guaranteed over an automotive-a temperature range of ?40 ? c to +85 ? c. for a complete list of related documentation, click here . logic block diagram address latch 16 k x 8 f-ram array data latch 8 sda counter serial to parallel converter control logic scl wp a0-a2 device id and manufacturer id 8 14 8 note 1. the CY15B128J does not meet the nxp i 2 c specification in the fast-mo de plus (fm+, 1 mhz) for i ol and in the high speed mode (hs-mode, 3.4 mhz) for v hys . refer to the dc electrical characteristics table for more details.
CY15B128J document number: 001-90872 rev. *g page 2 of 19 contents pinout ................................................................................ 3 pin definitions .................................................................. 3 functional overview ........................................................ 4 memory architecture ........................................................ 4 two-wire interface ... ............... ........... ........... ........... ......... 4 stop condition (p) ..................................................... 4 start condition (s) ................................................... 4 data/address transfer ................................................ 5 acknowledge / no-acknowledge ................................. 5 high speed mode (hs-mode) .... .............. ........... ......... 6 slave device address ......... ........................................ 6 addressing overview .......... ........................................ 6 data transfer .............................................................. 6 memory operation ............................................................ 6 write operation ........................................................... 6 read operation ........................................................... 7 sleep mode ................................................................. 9 device id ......................................................................... 10 maximum ratings ........................................................... 11 operating range ............................................................. 11 dc electrical characteristics ........................................ 11 data retention and endurance ..................................... 12 capacitance .................................................................... 12 thermal resistance ........................................................ 12 ac test loads and waveforms ..................................... 12 ac test conditions ........................................................ 12 ac switching characteristics ....................................... 13 power cycle timing ....................................................... 14 ordering information ...................................................... 15 ordering code definitions ..... .................................... 15 package diagram ............................................................ 16 acronyms ........................................................................ 17 document conventions ................................................. 17 units of measure ....................................................... 17 document history page ................................................. 18 sales, solutions, and legal information ...................... 19 worldwide sales and design s upport ......... .............. 19 products .................................................................... 19 psoc? solutions ...................................................... 19 cypress developer community ................................. 19 technical support ................. .................................... 19
CY15B128J document number: 001-90872 rev. *g page 3 of 19 pinout figure 1. 8-pin soic pinout wp scl 1 2 3 4 5 a0 8 7 6 v dd sda a1 top view not to scale v ss a2 pin definitions pin name i/o type description a0-a2 input device select address 0-2 . these pins are used to select one of up to eight devices of the same type on the same two-wire bus. to select the device, the address value on the three pins must match the corresponding bits contained in the slave addre ss. the address pins are pulled down internally. sda input/output serial data address . this is a bidirectional pin for the tw o-wire interface. it is open-drain and is intended to be wire-and'd with other devices on th e two-wire bus. the input buffer incorporates a schmitt trigger for noise immunity and the output driver includes slope control for falling edges. an external pull-up resistor is required. scl input serial clock . the serial clock pin for the two-wire interface. data is clocked out of the part on the falling edge, and into the device on the rising edge. the scl input also incorporates a schmitt trigger input for noise immunity. wp input write protect . when tied to v dd , addresses in the entire memory map will be write-protected. when wp is connected to ground, all addresses are wr ite enabled. this pin is pulled down internally. v ss power supply ground for the device. must be connected to the ground of the system. v dd power supply power supply input to the device.
CY15B128J document number: 001-90872 rev. *g page 4 of 19 functional overview the CY15B128J is a serial f- ram memory. the memory array is logically organized as 16,384 8 bits and is accessed using a two-wire (i 2 c) interface. the functional operation of the f-ram is similar to serial eeprom. t he major difference between the CY15B128J and a serial eeprom with the same pinout is the f-ram's superior write performance, high endurance, and low power consumption. memory architecture when accessing the CY15B128J, the user addresses 16k locations of eight data bits each. these eight data bits are shifted in or out serially. the addresses are accessed using the two-wire protocol, which includes a slave address (to distinguish other non-memory devices) and a two-byte address. the upper 2 bits of the address range are 'don't care' values. the complete address of 14 bits specifies each byte address uniquely. the access time for the memory operation is essentially zero, beyond the time needed for the serial protocol. that is, the memory is read or written at th e speed of the two-wire bus. unlike a serial eeprom, it is not nece ssary to poll the device for a ready condition because writes occur at bus speed. by the time a new bus transaction can be shifted into the device, a write operation is complete. this is explained in more detail in memory operation on page 6 . two-wire interface the CY15B128J employs a bidirectional two-wire bus protocol using few pins or board space. figure 2 illustrates a typical system configuration using t he CY15B128J in a microcon- troller-based system. the two-wire bus is familiar to many users but is described in this section. by convention, any device that is sending data to the bus is the transmitter while the target device for this data is the receiver. the device that is controlling th e bus is the master. the master is responsible for generating the clock signal for all operations. any device on the bus that is being controlled is a slave. the CY15B128J is always a slave device. the bus protocol is controlled by transition states in the sda and scl signals. there are four conditions including start, stop, data bit, or acknowledge. figure 3 and figure 4 on page 5 illus- trate the signal conditions that specify the four states. detailed timing diagrams are shown in the electrical specifications section. the CY15B128J does not meet the nxp i 2 c specification in the fast-mode plus (fm+, 1 mhz) for i ol and in the high speed mode (hs-mode, 3.4 mhz) for v hys . refer to the dc electrical characteristics table for more details. stop condition (p) a stop condition is indicated when the bus master drives sda from low to high while the scl signal is high. all operations using the CY15B128J should end with a stop condition. if an operation is in progress when a st op is asserted, the operation will be aborted. the master must have control of the sda (not a memory read) to assert a stop condition. start condition (s) a start condition is indicated when the bus master drives sda from high to low while the sc l signal is high. all commands should be preceded by a start condition. an operation in progress can be aborted by asserting a start condition at any time. aborting an operation using the start condition will ready the CY15B128J for a new operation. figure 2. system configuration using serial (i 2 c) f-ram sda scl dd a0 a0 a0 a1 a1 a1 scl scl scl sda sda sda wp wp wp #0 #1 #7 a2 a2 a2 microcontroller v dd v dd v CY15B128J CY15B128J CY15B128J r pmin = (v dd - v ol max) / i ol r pmax = t r / (0.8473 * c b )
CY15B128J document number: 001-90872 rev. *g page 5 of 19 if during operation the power supply drops below the specified v dd minimum, the system should issue a start condition prior to performing another operation. data/address transfer all data transfers (including addresses) take place while the scl signal is high. except under the three conditions described above, the sda signal should not change while scl is high. acknowledge / no-acknowledge the acknowledge takes place after the 8th data bit has been transferred in any transaction. during this state the transmitter should release the sda bus to allow the receiver to drive it. the receiver drives the sda signal low to acknowledge receipt of the byte. if the receiver does no t drive sda low, the condition is a no-acknowledge and the operation is aborted. the receiver will fail to acknowledge for two distinct reasons, the first being that a byte transf er fails. in this case, the no-acknowledge ceases the current operation so that the part can be addressed again. this allows the last byte to be recovered in the event of a communication error. the second and most common reason is that, the receiver does not acknowledge to deliberately end an operation. for example, during a read operation, the CY15B128J will continue to place data on the bus as long as the receiver sends acknowledges (and clocks). when a read operation is complete and no more data is needed, the receiver mu st not acknowledge the last byte. if the receiver acknowledges the last byte, this causes the CY15B128J to attempt to drive the bus on the next clock while the master is sending a new command such as stop. figure 3. start and stop conditions full pagewidth sda scl p stop condition sda scl s start condition figure 4. data transfer on the i 2 c bus handbook, full pagewidth s or p sda s p scl stop or start condition s start condition 2 3 4 - 8 9 ack 9 ack 78 12 msb acknowledgement signal from slave byte complete acknowledgement signal from receiver 1 figure 5. acknowledge on the i 2 c bus handbook, full pagewidth s start condition 9 8 2 1 clock pulse for acknowledgement no acknowledge acknowledge data output by master data output by slave scl from master
CY15B128J document number: 001-90872 rev. *g page 6 of 19 high speed mode (hs-mode) the CY15B128J supports a 3.4-mhz high-speed mode. a master co de (00001xxxb) must be issued to place the device into the high-speed mode. communication between master and slave will then be enabled for speeds up to 3.4 mhz. a stop condition will exit hs-mode. single- and multiple-b yte reads and writ es are supported. slave device address the first byte that the CY15B128J expects after a start condition is the slave address. as shown in figure 7 , the slave address contains the device type or slave id, the device select address bits, and a bit that specif ies if the transaction is a read or a write. bits 7-4 are the device type (slave id) and should be set to 1010b for the CY15B128J. these bits allow other function types to reside on the two-wire bus within an identical address range. bits 3-1 are the device select addr ess bits. they must match the corresponding value on the external address pins to select the device. up to eight CY15B128J devices can reside on the same two-wire bus by assigning a different address to each. bit 0 is the read/write bit (r/w ). r/w = 1 indicates a read operation and r/w = 0 indicates a write operation. addressing overview after the CY15B128J (as receiver) acknowledges the slave address, the master can plac e the memory address on the bus for a write operation. the address requires two bytes. the complete 14-bit address is latched internally. each access causes the latched address value to be incremented automati- cally. the current address is the value that is held in the latch; either a newly written value or the address following the last access. the current address will be held for as long as power remains or until a new value is written. reads always use the current address. a random read address can be loaded by beginning a write operation as explained below. after transmission of each data byte, just prior to the acknowledge, the CY15B128J increments the internal address latch. this allows the next sequential byte to be accessed with no additional addressing. after the last address (3fffh) is reached, the address latch will roll over to 0000h. there is no limit to the number of bytes that can be accessed with a single read or write operation. data transfer after the address bytes have been transmitted, data transfer between the bus master and the CY15B128J can begin. for a read operation the CY15B128J will place 8 data bits on the bus then wait for an acknowledge from the master. if the acknowledge occurs, the cy15 b128j will transfer the next sequential byte. if the acknowledge is not sent, the CY15B128J will end the read operation. for a write operation, the CY15B128J will accept 8 data bits from the master then sends an acknowledge. all data transfer occurs msb (most significant bit) first. memory operation the CY15B128J is designed to operate in a manner very similar to other two-wire interface memory products. the major differ- ences result from the higher performance write capability of f-ram technology. these improvements result in some differ- ences between the CY15B128J and a similar configuration eeprom during writes. the comp lete operation for both writes and reads is explained below. write operation all writes begin with a slave address, then a memory address. the bus master indicates a write operation by setting the lsb of the slave address (r/w bit) to a '0'. after addressing, the bus master sends each byte of data to the memory and the memory generates an acknowledge condit ion. any number of sequential bytes may be written. if the end of the address range is reached internally, the address counter will wrap from 3fffh to 0000h. unlike other nonvolatile memory technologies, there is no effective write delay with f-ram. since the read and write access times of the underlying memory are the same, the user experiences no delay through th e bus. the entire memory cycle occurs in less time than a single bus clock. therefore, any operation including read or writ e can occur immediately following a write. acknowledge polling, a technique used with eeproms to determine if a write is complete is unnecessary and will always return a ready condition. figure 6. data transfer format in hs-mode handbook, full pagewidth f/s-mode hs-mode f/s-mode 01 / a 1 data n (bytes + ack.) w / r s master code s slave add. hs-mode continues s slave add. p no acknowledge acknowledge or no acknowledge figure 7. memory slave device address handbook, halfpage r/w lsb msb slave id 10 1 0 a2 a0 a1 device select
CY15B128J document number: 001-90872 rev. *g page 7 of 19 internally, an actual memory write occurs after the 8th data bit is transferred. it will be complete before the acknowledge is sent. therefore, if the user desires to abort a write without altering the memory contents, this should be done using start or stop condition prior to the 8th data bit. the CY15B128J uses no page buffering. the memory array can be writ e-protected using the wp pin. setting the wp pin to a high condition (v dd ) will write-protect all addresses. the CY15B128J will not acknowledge data bytes that are written to protected addresses. in addition, the address counter will not increment if wr ites are attempted to these addresses. setting wp to a low state (v ss ) will disable the write protect. wp is pulled down internally. figure 8 and figure 9 illustrate a single-byte and multiple-byte write cycles in fast -mode plus (fm+). figure 10 illustrates a single-byte write cycles in hs mode. read operation there are two basic types of read operations. they are current address read and selective address read. in a current address read, the CY15B128J uses the in ternal address latch to supply the address. in a selective read, the user performs a procedure to set the address to a specific value. current address & sequential read as mentioned in the previous paragraph, the CY15B128J uses an internal latch to supply the address for a read operation. a current address read uses the existing value in the address latch as a starting place for the read operation. the system reads from the address immediately following that of the last operation. to perform a current address read, the bus master supplies a slave address with the lsb set to a '1'. this indicates that a read operation is requested. after receiving the complete slave address, the CY15B128J will begin shifting out data from the current address on the next clock. the current address is the value held in the internal address latch. beginning with the current address, the bus master can read any number of bytes. thus, a sequential read is simply a current address read with multiple byte transfers. after each byte, the internal address counter will be incremented. note each time the bus master acknowledges a byte, this indicates that the CY15B128J should read out the next sequential byte. figure 8. single-byte write s a slave address 0 address msb a data byte a p by master by f-ram start address & data stop acknowledge address lsb a figure 9. multi-byte write figure 10. hs-mode byte write s a slave address 0 address msb a data byte a p by master by f-ram start address & data stop acknowledge address lsb a data byte a s a slave address 0 data byte a p by master by f-ram start & enter hs-mode address & data stop & exit hs-mode s 1 start acknowledge x x x 1 0 0 0 0 hs-mode command address msb a address lsb a no acknowledge
CY15B128J document number: 001-90872 rev. *g page 8 of 19 there are four ways to properly terminate a read operation. failing to properly terminate the read will most likely create a bus contention as the CY15B128J attempts to read out additional data onto the bus. the four valid methods are: 1. the bus master issues a no-acknowledge in the 9th clock cycle and a stop in the 10th clo ck cycle. this is illustrated in the following diagrams. this method is preferred. 2. the bus master issues a no-acknowledge in the 9th clock cycle and a start in the 10th. 3. the bus master issues a stop in the 9th clock cycle. 4. the bus master issues a start in the 9th clock cycle. if the internal address reache s 3fffh, it will wrap around to 0000h on the next read cycle. figure 11 and figure 12 show the proper operation for current address reads. figure 11. current address read figure 12. sequential read figure 13. hs-mode current address read s a slave address 1 data byte 1 p by master by f-ram start address stop acknowledge no acknowledge data s a slave address 1 data byte 1 p by master by f-ram start address stop acknowledge no acknowledge data data byte a acknowledge s a slave address 1 data byte 1 p by master by f-ram start & enter hs-mode address stop & exit hs-mode no acknowledge data s 1 start acknowledge x x x 1 0 0 0 0 hs-mode command no acknowledge
CY15B128J document number: 001-90872 rev. *g page 9 of 19 selective (random) read there is a simple technique that allows a user to select a random address location as the starting point for a read operation. this involves using the first three bytes of a write operation to set the internal address followed by subsequent read operations. to perform a selective read, the bus master sends out the slave address with the lsb (r/w ) set to 0. this specifies a write operation. according to the writ e protocol, the bus master then sends the address bytes that are loaded into the internal address latch. after the CY15B128J acknowledges the address, the bus master issues a start condition. this simultaneously aborts the write operation and allows the read command to be issued with the slave address lsb set to a '1'. the operation is now a current address read. sleep mode a low power mode called sleep mode is implemented on the CY15B128J device. the device will enter this low-power state when the sleep command 86h is clocked-in. sleep mode entry can be entered as follows: 1. the master sends a start command. 2. the master sends reserved slave id 0xf8. 3. the CY15B128J sends an ack. 4. the master sends the i 2 c-bus slave address of the slave device it needs to identify. the last bit is a 'don't care' value (r/w bit). only one device must acknowledge this byte (the one that has the i 2 c-bus slave address). 5. the CY15B128J sends an ack. 6. the master sends a re-start command. 7. the master sends reserved slave id 0x86. 8. the CY15B128J sends an ack. 9. the master sends stop to ensure the device enters sleep mode. once in sleep mode, the device draws i zz current, but the device continues to monitor the i 2 c pins. once the master sends a slave address that the cy15b1 28j identifies, it will "wakeup" and be ready for normal operation within t rec (400 ? s max.). as an alternative method of dete rmining when the device is ready, the master can send read or write commands and look for an ack. while the device is waking up, it will nack the master until it is ready. figure 14. selective (random) read s a slave address 1 data byte 1 p by master by f-ram start address stop no acknowledge data s a slave address 0 address msb a start address acknowledge address lsb a figure 15. sleep mode entry s a p by master by f-ram start address stop s a rsvd slave id (f8) slave address a start address acknowledge rsvd slave id (86) x
CY15B128J document number: 001-90872 rev. *g page 10 of 19 device id the CY15B128J device incorporates a means of identifying the device by providing th ree bytes of data, which are manufacturer, product id, and die revision. the device id is read-only. it can be accessed as follows: 1. the master sends a start command. 2. the master sends reserved slave id 0xf8 3. the CY15B128J sends an ack. 4. the master sends the i 2 c-bus slave address of the slave device it needs to identify. the last bit is a 'don't care' value (r/w bit). only one device must acknowledge this byte (the one that has the i 2 c-bus slave address). 5. the CY15B128J sends an ack. 6. the master sends a re-start command. 7. the master sends reserved slave id 0xf9. 8. the CY15B128J sends an ack. 9. the device id read can be done, starting with 12 manufacturer bits, followed by the nine part identification bits, and then the three die revision bits. 10.the master ends the device id read sequence by nacking the last byte, thus resetting t he slave device state machine and allowing the master to send the stop command. note the reading of the device id can be stopped any time by sending a nack command. note product id bits 0 and 4 are reserved. figure 16. read device id table 1. device id device id (3 bytes) device id description 23?12 (12 bits) 11?8 (4 bits) 7?3 (5 bits) 2?0 (3 bits) manufacturer id product id density variation die rev 004121h 000000000100 0001 00100 001 s a data byte data byte 1 p by master by f-ram start address stop no acknowledge data s a rsvd slave id (f8) slave address a start address acknowledge rsvd slave id (f9) a a data byte acknowledge
CY15B128J document number: 001-90872 rev. *g page 11 of 19 maximum ratings exceeding maximum ratings may shorten the useful life of the device. these user guidelines are not tested. storage temperature ..... ............ ............... ?55 ? c to +125 ? c maximum accumulated storage time at 125 c ambient temperature ................................. 1000 h at 85 c ambient temperature ................................ 10 years ambient temperature with power applied ..... ............... ............... ?55 c to +125 c supply voltage on v dd relative to v ss .........?1.0 v to +4.5 v input voltage* ......... ?1.0 v to + 4.5 v and v in < v dd + 1.0 v dc voltage applied to outputs in hi-z state ........................................ ?0.5 v to v dd + 0.5 v transient voltage (< 20 ns) on any pin to ground potential ............ ..... ?2.0 v to v dd + 2.0 v package power dissipation capability (t a = 25 c) ................................................. 1.0 w surface mount lead soldering temperature (3 seconds) ........ .............. .............. ..... +260 ? c electrostatic discharge voltage human body model (jedec std jesd22-a114-b) .............. 2 kv charged device model (jedec std jesd22-c101-a) ........ 500 v latch-up current .................................................... > 140 ma * exception: the ?v in < v dd + 1.0 v? restriction does not apply to the scl and sda inputs. operating range range ambient temperature (t a ) v dd automotive-a ?40 ? c to +85 ? c 2.0 v to 3.6 v dc electrical characteristics over the operating range parameter description test conditions min typ [2] max unit v dd power supply 2.0 3.3 3.6 v i dd average v dd current scl toggling between v dd ? 0.2 v and v ss , other inputs v ss or v dd ? 0.2 v. f scl = 100 khz ? ? 175 ? a f scl = 1 mhz ? ? 400 ? a f scl = 3.4 mhz ? ? 1000 ? a i sb v dd standby current scl = sda = v dd .all other inputs v ss or v dd . stop command issued. ? 90 150 ? a i zz sleep mode current scl = sda = v dd .all other inputs v ss or v dd . stop command issued. ?58 ? a i li input leakage current (except wp and a2-a0) v ss < v in < v dd ?1 ? +1 ? a input leakage current (for wp and a2-a0) v ss < v in < v dd ?1 ? +100 ? a i lo output leakage current v ss < v out < v dd ?1 ? +1 ? a v ih input high voltage (sdl, sda) 0.7 v dd ?v dd (max) + 0.3 v input high voltage (wp, a2-a0) 0.7 v dd ?v dd + 0.3 v v il input low voltage ? 0.3 ? 0.3 v dd v v ol [3] output low voltage i ol = 3 ma ? ? 0.4 v i ol = 6 ma ? ? 0.6 v r in [4] input resistance (wp, a2-a0) for v in = v il(max) 50 ? ? k ? for v in = v ih(min) 1??m ? v hys [5] hysteresis of schmitt trigger inputs f scl = 100 khz, 400 khz, 1 mhz 0.05 v dd ??v f scl = 3.4 mhz 0.06 v dd ??v notes 2. typical values are at 25 c, v dd = v dd (typ). not 100% tested. 3. the CY15B128J does not meet the nxp i 2 c specification in the fast-mode plus (fm+, 1 mhz) for i ol of 20 ma at a v ol of 0.4 v. 4. the input pull-down circuit is strong (50 k ? ) when the input voltage is below v il and weak (1 m ? ) when the input voltage is above v ih . 5. the CY15B128J does not meet the nxp i 2 c specification in the high speed mode (hs-mode, 3.4 mhz) for v hys of 0.1 v dd .
CY15B128J document number: 001-90872 rev. *g page 12 of 19 ac test conditions input pulse levels .................................10% and 90% of v dd input rise and fall times .................................................10 ns input and output timing reference levels ................0.5 v dd output load capacitance ............................................ 100 pf data retention and endurance parameter description test condition min max unit t dr data retention t a = 85 ? c10?years t a = 75 ? c38? t a = 65 ? c 151 ? nv c endurance over operating temperature 10 14 ? cycles capacitance parameter [6] description test conditions max unit c io input/output pin capacitance (sda) t a = 25 ? c, f = 1 mhz, v dd = v dd (typ) 8 pf c i input pin capacitance 6 pf thermal resistance parameter [6] description test conditions 8-pin soic unit ? ja thermal resistance (junction to ambient) test conditions follow standard test methods and procedures for measuring thermal impedance, per eia / jesd51. 146 ? c/w ? jc thermal resistance (junction to case) 48 ? c/w ac test loads and waveforms figure 17. ac test loads and waveforms 3.0 v output 100 pf 867 ? 6. these parameters are guarante ed by design and are not tested.
CY15B128J document number: 001-90872 rev. *g page 13 of 19 ac switching characteristics over the operating range parameter [7] alt. parameter description fast-mode plus (fm+) [9] hs-mode [9] unit min max min max f scl [8] scl clock frequency ? 1.0 ? 3.4 mhz t su; sta start condition setup for repeated start 260 ? 160 ? ns t hd;sta start condition hold time 260 ? 160 ? ns t low clock low period 500 ? 160 ? ns t high clock high period 260 ? 60 ? ns t su;dat t su;data data in setup 50 ? 10 ? ns t hd;dat t hd;data data in hold 0 ? 0 70 ns t dh data output hold (from scl at v il )0?0?ns t r [10] t r input rise time ? 120 10 80 ns t f [10] t f input fall time 20 * (v dd / 5.5 v) 120 10 80 ns t su;sto stop condition setup 260 ? 160 ? ns t aa t vd;data scl low to sda data out valid ? 450 ? 130 ns t vd;ack ack output valid time ? 450 ? 130 ns t of [10] output fall time from v ih min to v il max 20 * (v dd /5.5 v) 120 ? 80 ns t buf bus free before new transmission 500 ? 300 ? ns t sp noise suppression time constant on scl, sda 0 50 ? 5 ns figure 18. read bus timing diagram figure 19. write bus timing diagram t su:sda start t r ` t f stop start t buf t high 1/fscl t low t sp t sp acknowledge t hd:dat t su:dat t aa t dh scl sda t su:sto start stop start acknowledge t aa t hd:dat t hd:sta t su:dat scl sda notes 7. test conditions assume signal transition time of 10 ns or less, timing reference levels of v dd /2, input pulse levels of 0 to v dd (typ), and output loadi ng of the specified i ol and 100 pf load capacitance shown in figure 17 . 8. the speed-related specific ations are guaranteed characteristic points along a continuous curve of operation from dc to f scl (max). 9. bus load (cb) considerations; cb < 550 pf for i 2 c clock frequency (scl) 1 mhz; cb < 100 pf for scl at 3.4 mhz. 10. these parameters are guaranteed by design and are not tested.
CY15B128J document number: 001-90872 rev. *g page 14 of 19 power cycle timing over the operating range parameter description min max unit t pu power-up v dd (min) to first access (start condition) 1 ? ms t pd last access (stop condition) to power-down (v dd (min)) 0 ? s t vr [11, 12] v dd power-up ramp rate 50 ? s/v t vf [11, 12] v dd power-down ramp rate 100 ? s/v t rec recovery time from sleep mode ? 400 s figure 20. power cycle timing sda ~ ~ ~ ~ t pu t vr t vf v dd v dd(min) t pd v dd(min) i c start 2 i c stop 2 notes 11. slope measured at any point on the v dd waveform. 12. these parameters are guaranteed by design and are not tested.
CY15B128J document number: 001-90872 rev. *g page 15 of 19 ordering information ordering code package diagram package type operating range CY15B128J-sxa 51-85066 8-pin soic automotive-a CY15B128J-sxat 51-85066 8-pin soic all these parts are pb-free. contact your local cypre ss sales representative for availability of these parts. ordering code definitions option: blank = standard; t = tape and reel temperature range: a = automotive-a (?40 ? c to +85 ? c) x = pb-free package type: s = 8-pin soic j = i 2 c f-ram density: 128 = 128-kbit voltage: b = 2.0 v to 3.6 v f-ram cypress 15 cy b 128 j s x a t -
CY15B128J document number: 001-90872 rev. *g page 16 of 19 package diagram figure 21. 8-pin soic (150 mils) package outline, 51-85066 51-85066 *h
CY15B128J document number: 001-90872 rev. *g page 17 of 19 acronyms document conventions units of measure acronym description ack acknowledge cmos complementary metal oxide semiconductor eia electronic industries alliance i 2 c inter-integrated circuit i/o input/output jedec joint electron devices engineering council lsb least significant bit msb most significant bit nack no acknowledge rohs restriction of hazardous substances r/w read/write scl serial clock line sda serial data access soic small outline integrated circuit wp write protect symbol unit of measure c degree celsius hz hertz kb 1024 bit khz kilohertz k ? kilohm mhz megahertz m ? megaohm ? a microampere ? s microsecond ma milliampere ms millisecond ns nanosecond ? ohm % percent pf picofarad v volt w watt
CY15B128J document number: 001-90872 rev. *g page 18 of 19 document history page document title: CY15B128J, 128-kbi t (16k 8) automotive serial (i 2 c) f-ram document number: 001-90872 rev. ecn no. submission date orig. of change description of change ** 4266210 01/29/2014 gvch new spec *a 4390913 06/20/2014 gvch changed status from advance to preliminary. maximum ratings : electrostatic discharge voltage removed machine model. dc electrical characteristics : added i sb and i zz typical value. changed v ih value from v dd + 0.5 v to v dd (max) + 0.3 v for sda, scl and v dd (max) + 0.3 v for wp, a2-a0. removed v ol2 parameter spec and renamed v ol1 as v ol parameter spec. added v ol = 0.6 v at 6 ma. changed v il min value from ?0.5 v to ?0.3 v. added v hys parameter spec. ac switching characteristics : added t of, t buf, t aa, t vd;ack value for 3.4 mhz. removed footnote 7. changed device id from 004101h to 004121h. updated capacitance table. *b 4512788 09/24/2014 gvch added footnote 3 for the difference in i ol with respect to i 2 c specification. *c 4571858 11/18/2014 gvch changed v hys spec value from 0.1 v dd to 0.05 v dd for 3.4 mhz frequency. added footnote 5 for the difference in v hys with respect to i 2 c specification. *d 4596783 12/17/2014 gvch added footnote 1 for the difference in i ol and v hys with respect to nxp i 2 c specification. two-wire interface : added description for the difference in i ol and v hys with respect to nxp i 2 c specification. changed v hys spec value from 0.05 v dd to 0.06 v dd for 3.4 mhz frequency updated footnote 3 . updated footnote 5 for the difference in v hys with respect to nxp i 2 c specifi- cation. updated to new template. *e 4786735 06/04/2015 gvch changed status from preliminary to final. updated package diagram : spec 51-85066 ? changed revision from *f to *g. *f 4883131 09/03/2015 zsk / psr updated functional description : added ?for a complete list of related documentation, click here .? at the end. updated maximum ratings : removed ?maximum junction temperature?. added ?maximum accumulated storage time?. added ?ambient temperature with power applied?. *g 5084247 01/13/2016 gvch updated ordering information : updated part numbers. updated package diagram : spec 51-85066 ? changed revision from *g to *h.
document number: 001-90872 rev. *g revised january 13, 2016 page 19 of 19 all products and company names mentioned in this document may be the trademarks of their respective holders. CY15B128J ? cypress semiconductor corporation, 2014-2016. the information contained herein is subject to change without notice. cypress s emiconductor corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a cypress product. nor does it convey or imply any license under patent or other rights. cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement wi th cypress. furthermore, cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. any source code (software and/or firmware) is owned by cypress semiconductor corporation (cypress) and is protected by and subj ect to worldwide patent protection (united states and foreign), united states copyright laws and internatio nal treaty provisions. cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the cypress source code and derivative works for the sole purpose of creating custom software and or firmware in su pport of licensee product to be used only in conjunction with a cypress integrated circuit as specified in the applicable agreement. any reproduction, modification, translation, compilation, or repre sentation of this source code except as specified above is prohibited without the express written permission of cypress. disclaimer: cypress makes no warranty of any kind, express or implied, with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. cypress reserves the right to make changes without further notice to t he materials described herein. cypress does not assume any liability arising out of the application or use of any product or circuit described herein. cypress does not authori ze its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of cypress? prod uct in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies cypress against all charges. use may be limited by and subject to the applicable cypress software license agreement. sales, solutions, and legal information worldwide sales and design support cypress maintains a worldwide network of offices, solution center s, manufacturer?s representatives, and distributors. to find t he office closest to you, visit us at cypress locations . products automotive cypress.co m/go/automotive clocks & buffers cypress.com/go/clocks interface cypress. com/go/interface lighting & power control cypress.com/go/powerpsoc memory cypress.com/go/memory psoc cypress.com/go/psoc touch sensing cyp ress.com/go/touch usb controllers cypress.com/go/usb wireless/rf cypress.com/go/wireless psoc ? solutions psoc.cypress.com/solutions psoc 1 | psoc 3 | psoc 4 | psoc 5lp cypress developer community community | forums | blogs | video | training technical support cypress.com/go/support

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