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  cy14v256la 256-kbit (32 k 8) nvsram cypress semiconductor corporation ? 198 champion court ? san jose , ca 95134-1709 ? 408-943-2600 document number: 001-76295 rev. *b revised may 3, 2013 256-kbit (32 k 8) nvsram features 35 ns access time internally organized as 32 k 8 hands off automatic store on power down with only a small capacitor store to quantumtrap nonvolatile elements initiated by software, device pin, or autostore on power down recall to sram initiated by software or power up infinite read, write, and recall cycles 1 million store cycles to quantumtrap 20 year data retention core v cc = 3.0 v to 3.6 v; i/o v ccq = 1.65 v to 1.95 v industrial temperature 48-ball fine-pitch ball grid array (fbga) package pb-free and restriction of hazardous substances (rohs) compliance functional description the cypress cy14v256la is a fast static ram, with a nonvolatile element in each memory cell. the memory is organized as 32 k bytes of 8 bits each. the embedded nonvolatile elements in corporate quantumtrap technology, producing the world?s most reliable nonvolatile memory. the sram provides infinite read and write cycles, while independent nonvolatile data resides in the highly reliable quantumtrap cell. data transfers from the sram to the nonvolatile elements (the store operation) takes place automatically at power down. on power-up, data is restored to the sram (the recall operation) from the nonvolatile memory. both the store and recall operations are also available under software control. store/ recall control power control software detect static ram array 512 x 512 quantum trap 512 x 512 store recall column i/o column dec row decoder input buffers oe ce we hsb v cc v cap a 14 - a 2 a 0 a 1 a 2 a 3 a 4 a 10 a 5 a 6 a 7 a 8 a 9 a 11 a 12 a 13 a 14 dq 0 dq 1 dq 2 dq 3 dq 4 dq 5 dq 6 dq 7 logic block diagram v ccq logic block diagram
cy14v256la document number: 001-76295 rev. *b page 2 of 22 contents pinout ................................................................................ 3 pin definitions .................................................................. 3 device operation .............................................................. 4 sram read ................................................................ 4 sram write ................................................................. 4 autostore operation .................................................... 4 hardware store operation ....................................... 4 hardware recall (power-up) .................................. 5 software store ......................................................... 5 software recall ....................................................... 5 preventing autostore .................................................. 6 data protection ............................................................ 6 maximum ratings ............................................................. 7 operating range ............................................................... 7 dc electrical characteristics .......................................... 7 data retention and endurance ....................................... 8 capacitance ...................................................................... 8 thermal resistance .......................................................... 8 ac test loads .................................................................. 9 ac test conditions .......................................................... 9 ac switching characteristics ....................................... 10 sram read cycle .................................................... 10 sram write cycle ..................................................... 10 switching waveforms .................................................... 11 autostore/power-up recall ....................................... 13 switching waveforms .................................................... 14 software controlled store/recall cycle ................ 15 switching waveforms .................................................... 15 hardware store cycle ................................................. 16 switching waveforms .................................................... 16 truth table for sram operations ................................ 17 ordering information ...................................................... 18 ordering code definitions ..... .................................... 18 package diagrams .......................................................... 19 acronyms ........................................................................ 20 document conventions ................................................. 20 units of measure ....................................................... 20 document history page ................................................. 21 sales, solutions, and legal information ...................... 22 worldwide sales and design s upport ......... .............. 22 products .................................................................... 22 psoc solutions ......................................................... 22
cy14v256la document number: 001-76295 rev. *b page 3 of 22 pinout figure 1. 48-ball fbga (6 10 1.2 mm) pinout we v ccq a 11 a 10 v cap a 6 a 0 a 3 ce nc dq 0 a 4 a 5 nc dq 2 dq 3 nc v ss a 9 a 8 oe v ss a 7 nc nc v cc nc a 2 a 1 nc v ccq dq 4 nc dq 5 dq 6 nc dq 7 nc a 14 a 13 a 12 hsb 3 2 6 5 4 1 d e b a c f g h nc nc dq 1 (not to scale) top view ( 8) v ss v ss v cc pin definitions pin name i/o type description a 0 ?a 14 input address inputs. used to select one of the 32,768 bytes of the nvsram. dq 0 ?dq 7 input/output bidirectional data i/o lines. used as input or output lines depending on operation. we input write enable input, active low. when the chip is enabled and we is low, data on the i/o pins is written to the specific address location. ce input chip enable input, active low. when low, se lects the chip. when high, deselects the chip. oe input output enable, active low. the active low oe input enables the data out put buffers during read cycles. i/o pins are tri-stated on deasserting oe high. v ss ground ground for the device. must be connected to the ground of the system. v cc power supply power supply inputs to the core of the device. v ccq power supply power supply inputs for the inputs and outputs of the device. hsb input/output hardware store busy (hsb ). when low, this output indicates t hat a hardware store is in progress. when pulled low, external to the chip, it initiate s a nonvolatile store operation. after each hardware and software store operation hsb is driven high for a short time (t hhhd ) with standard output high current and then a weak internal pull-up resistor keep s this pin high (external pull-up resistor connection optional). v cap power supply autostore capacitor. supplies power to the nvsram during power loss to store data from sram to nonvolatile elements. nc no connect no connect. this pin is not connected to the die.
cy14v256la document number: 001-76295 rev. *b page 4 of 22 device operation the cy14v256la nvsram is made up of two functional components paired in the same physical cell. they are an sram memory cell and a nonvolatile quantumtrap cell. the sram memory cell operates as a standard fast static ram. data in the sram is transferred to the nonvolatile cell (the store operation), or from the nonvolatile cell to the sram (the recall operation). using this unique arch itecture, all cells are stored and recalled in parallel. during the store and recall operations, sram read and write operations are inhibited. the cy14v256la supports infinite reads and writes similar to a typical sram. in addition, it provides infinite recall operations from the nonvolatile cells and up to 1 million store operations. refer to the truth table for sram operations on page 17 for a complete description of read and write modes. sram read the cy14v256la performs a read cycle when ce and oe are low and we and hsb are high. the address specified on pins a 0?14 determines which of the 32,768 data bytes each are accessed. when the read is in itiated by an address transition, the outputs are valid after a delay of t aa (read cycle 1). if the read is initiated by ce or oe , the outputs are valid at t ace or at t doe , whichever is later (read cycle 2) . the data outp ut repeatedly responds to address changes within the t aa access time without the need for transitions on any control input pins. this remains valid until another address change or until ce or oe is brought high, or we or hsb is brought low. sram write a write cycle is performed when ce and we are low and hsb is high. the address inputs must be stable before entering the write cycle and must re main stable until ce or we goes high at the end of the cycle. the dat a on the common i/o pins dq 0?7 are written into the memory if the data is valid t sd before the end of a we -controlled write or bef ore the end of a ce -controlled write. keep oe high during the entire wr ite cycle to avoid data bus contention on common i/o lines. if oe is left low, internal circuitry turns off the output buffers t hzwe after we goes low. autostore operation the cy14v256la stores data to the nvsram using one of the following three storage operations: hardware store activated by hsb ; software store activated by an address sequence; autostore on device power down. the autostore operation is a unique feature of quantumtrap technology and is enabled by default on the cy14v256la. during a normal operation, the device draws current from v cc to charge a capacitor connected to the v cap pin. this stored charge is used by the chip to perform a single store operation. if the voltage on the v cc pin drops below v switch the part automatically disconnects the v cap pin from v cc . a store operation is initiated with power provided by the v cap capacitor. note if a capacitor is not connected to v cap pin, autostore must be disabled using the soft sequence specified in preventing autostore on page 6 . if autostore is enabled without a capacitor on v cap pin, the device attempts an autostore operation without sufficient charge to complete t he store. this corrupts the data stored in nvsram. figure 2 shows the proper connection of the storage capacitor (v cap ) for automatic store operation. refer to dc electrical characteristics on page 7 for the size of v cap . the voltage on the v cap pin is driven to v cc by a regulator on the chip. place a pull-up on we to hold it inactive during power up. this pull-up is only effective if the we signal is tristate during power up. many mpus tristate their controls on power-up. this mu st be verified when using the pull-up. when the nvsram comes out of power-on-recall, the mpu mu st be active or the we held inactive until the mp u comes out of reset. to reduce unnecessary nonvolatile stores, autostore and hardware store operations are ignored unless at least one write operation has taken place since the most recent store or recall cycle. software initiat ed store cycles are performed regardless of whether a write operation has taken place. the hsb signal is monitored by the syst em to detect if an autostore cycle is in progress. figure 2. autostore mode hardware store operation the cy14v256la provides the hsb pin to control and acknowledge the store operations. use the hsb pin to request a hardware store cycle. when the hsb pin is driven low, the cy14v256la conditionally initiates a store operation after t delay . an actual store cycle only begins if a write to the sram has taken place since the last store or recall cycle. the hsb pin also acts as an open drain driver (internal 100 k ? weak pull-up resistor) that is internally driven low to indicate a busy condition when the store (initiated by any means) is in progress. note after each hardware and software store operation hsb is driven high for a short time (t hhhd ) with standard output high current and then remains high by internal 100 k ? pull-up resistor. sram write operations that are in progress when hsb is driven low by any means are given time (t delay ) to complete before the store operation is initiated. however, any sram write cycles requested after hsb goes low are inhibited until hsb returns high. in case the write latch is not set, hsb is not driven low by the cy14v256la. but any sram read and write cycles 0.1 uf v cc 10 kohm v cap we v cap v ss v ccq v ccq v cc 0.1 uf
cy14v256la document number: 001-76295 rev. *b page 5 of 22 are inhibited until hsb is returned high by mpu or other external source. during any store operation, rega rdless of how it is initiated, the cy14v256la continues to drive the hsb pin low, releasing it only when the store is comp lete. upon completion of the store operation, the nvsram memory access is inhibited for t lzhsb time after hsb pin returns high. leave the hsb unconnected if it is not used. hardware recall (power-up) during power up or after any low-power condition (v cc cy14v256la document number: 001-76295 rev. *b page 6 of 22 preventing autostore the autostore function is disabled by initiating an autostore disable sequence. a sequence of read operations is performed in a manner similar to the software store initiation. to initiate the autostore disable sequence, the following sequence of ce controlled read operations must be performed: 1. read address 0x0e38 valid read 2. read address 0x31c7 valid read 3. read address 0x03e0 valid read 4. read address 0x3c1f valid read 5. read address 0x303f valid read 6. read address 0x0b45 autostore disable the autostore is re-enabled by initiating an autostore enable sequence. a sequence of read operations is performed in a manner similar to the software recall initiation. to initiate the autostore enable sequence, the following sequence of ce controlled read operations must be performed: 1. read address 0x0e38 valid read 2. read address 0x31c7 valid read 3. read address 0x03e0 valid read 4. read address 0x3c1f valid read 5. read address 0x303f valid read 6. read address 0x0b46 autostore enable if the autostore function is disabled or reenabled, a manual store operation (hardware or software) must be issued to save the autostore state through subsequent power down cycles. the part comes from th e factory with autostore enabled and written 0x00 in all cells. data protection the cy14v256la protects data from corruption during low voltage conditions by inhibiting all externally initiated store and write operations. the low-voltage condition is detected when v cc < v switch . if the cy14v256la is in a write mode (both ce and we are low) at power up, after a recall or store, the write is inhibited until the sram is enabled after t lzhsb (hsb to output active). when v ccq < v iodis, i/os are disabled (no store takes place). this protects against inadvertent writes during brown out conditions on v ccq supply. l h l 0x0e38 0x31c7 0x03e0 0x3c1f 0x303f 0x0b46 read sram read sram read sram read sram read sram autostore enable output data output data output data output data output data output data active [3] l h l 0x0e38 0x31c7 0x03e0 0x3c1f 0x303f 0x0fc0 read sram read sram read sram read sram read sram nonvolatile store output data output data output data output data output data output high z active i cc2 [3] l h l 0x0e38 0x31c7 0x03e0 0x3c1f 0x303f 0x0c63 read sram read sram read sram read sram read sram nonvolatile recall output data output data output data output data output data output high z active [3] table 1. mode selection (continued) ce we oe a 14 ?a 0 [1] mode i/o power note 3. the six consecutive address locations must be in the order listed. we must be high during all six cycles to enable a nonvolatile cycle.
cy14v256la document number: 001-76295 rev. *b page 7 of 22 maximum ratings exceeding maximum ratings may shorten the useful life of the device. these user guidelines are not tested. storage temperature ..... ............ ............... ?65 ? c to +150 ? c maximum accumulated storage time: at 150 ? c ambient temperature ..................... 1000 h at 85 ? c ambient temperature .................... 20 years maximum junction temperature ................................. 150 ? c supply voltage on v cc relative to v ss ...........?0.5 v to 4.1 v supply voltage on v ccq relative to v ss ......?0.5 v to 2.45 v voltage applied to outputs in high z state ..................................?0.5 v to v ccq + 0.5 v input voltage .....................................?0.5 v to v ccq + 0.5 v transient voltage (< 20 ns) on any pin to ground potential ...............?2.0 v to v ccq + 2.0 v package power dissipation capability (t a = 25 c) ................................................. 1.0 w surface mount pb soldering temperature (3 seconds) ........ .............. .............. ..... +260 ? c dc output current (1 output at a time, 1s duration) .................................. 15 ma static discharge voltage (per mil-std-883, method 3015) .............. ........... > 2001 v latch up current .................................................... > 140 ma operating range range ambient temperature v cc v ccq industrial ?40 ? c to +85 ? c 3.0 v to 3.6 v 1.65 v to 1.95 v dc electrical characteristics over the operating range parameter description test conditions min typ [4] max unit v cc power supply voltage 3.0 3.3 3.6 v v ccq 1.65 1.8 1.95 v i cc1 average v cc current t rc = 35 ns values obtained without output loads (i out = 0 ma) ??60ma i ccq1 average v ccq current ? ? 20 ma i cc2 average v cc current during store all inputs don?t care, v cc = max average current for duration t store ??10ma i cc3 average v cc current at t rc = 200 ns, v cc(typ) , 25 c all inputs cycling at cmos levels. values obtained without output loads (i out = 0 ma) ?35?ma i ccq3 average v ccq current at t rc = 200 ns, v ccq(typ) , 25 c ?5?ma i cc4 average v cap current during autostore cycle all inputs don?t care. average current for duration t store ??8ma i sb v cc standby current ce > (v ccq ? 0.2 v). v in < 0.2 v or > (v ccq ? 0.2 v). standby current level after nonvolatile cycle is complete. inputs are static. f = 0 mhz ??8ma i ix [5] input leakage current (except hsb ) v ccq = max, v ss < v in < v ccq ?1 ? +1 a input leakage current (for hsb )v ccq = max, v ss < v in < v ccq ?100 ? +1 a notes 4. typical values are at 25 c, v cc = v cc(typ) and v ccq = v ccq(typ) . not 100% tested. 5. the hsb pin has i out = ?4 a for v oh of 1.07 v when both active high and low drivers are disabled. when they are enabled standard v oh and v ol are valid. this parameter is characterized but not tested.
cy14v256la document number: 001-76295 rev. *b page 8 of 22 i oz off-state output leakage current v ccq = max, v ss < v out < v ccq , ce or oe > v ih or we < v il ?1 ? +1 a v ih input high voltage ? 0.7 v ccq ?v ccq + 0.3 v v il input low voltage ? ? 0.3 ? 0.3 v ccq v v oh output high voltage i out = ?1 ma v ccq ? 0.45 ? ? v v ol output low voltage i out = 2 ma ? ? 0.45 v v cap [6] storage capacitor between v cap pin and v ss , 5 v rated 61 68 180 f v vcap [7, 8] maximum voltage driven on v cap pin by the device v cc = max ? ? v cc v data retention and endurance parameter description min unit data r data retention 20 years nv c nonvolatile store operations 1,000 k capacitance parameter [8] description test conditions max unit c in input capacitance (except hsb )t a = 25 ? c, f = 1 mhz, v cc = v cc(typ) , v ccq = v ccq(typ) 7pf input capacitance (for hsb ) 8pf c out output capacitance (except hsb )7pf output capacitance (for hsb )8pf thermal resistance parameter [8] description test conditions 48-ball fbga unit ? ja thermal resistance (junction to ambient) test conditions follow standard test methods and procedures for measuring thermal impedance, in accordance with eia/jesd51. 48.19 ? c/w ? jc thermal resistance (junction to case) 6.5 ? c/w dc electrical characteristics (continued) over the operating range parameter description test conditions min typ [4] max unit notes 6. min v cap value guarantees that there is a sufficient charge available to complete a successful autostore operation. max v cap value guarantees that the capacitor on v cap is charged to a minimum voltage during a power-up recall cycle so that an immediate power-down cycle can complete a successful autostore. therefore it is always recommended to us e a capacitor within the specified min and max limits. refer application note an43593 for more details on v cap options. 7. maximum voltage on v cap pin (v vcap ) is provided for guidance when choosing the v cap capacitor. the voltage rating of the v cap capacitor across the operating temperature range should be higher than the v vcap voltage. 8. these parameters are guaranteed by design and are not tested.
cy14v256la document number: 001-76295 rev. *b page 9 of 22 ac test conditions input pulse levels.................................................0 v to 1.8 v input rise and fall times (10% to 90%)...................... < 1.8 ns input and output timing reference levels........................ 0.9 v ac test loads figure 3. ac test loads 1.8 v output 5 pf r1 r2 450 ? 1.8 v output 30 pf r1 r2 450 ? for tri-state specs 450 ? 450 ?
cy14v256la document number: 001-76295 rev. *b page 10 of 22 ac switching characteristics over the operating range parameters [9] description 35 ns unit cypress parameters alt parameters min max sram read cycle t ace t acs chip enable access time ? 35 ns t rc [10] t rc read cycle time 35 ? ns t aa [11] t aa address access time ? 35 ns t doe t oe output enable to data valid ? 15 ns t oha [11] t oh output hold after address change 3 ? ns t lzce [12, 13] t lz chip enable to output active 3 ? ns t hzce [12, 13] t hz chip disable to output inactive ? 13 ns t lzoe [12, 13] t olz output enable to output active 0 ? ns t hzoe [12, 13] t ohz output disable to output inactive ? 13 ns t pu [12] t pa chip enable to power active 0 ? ns t pd [12] t ps chip disable to power standby ? 35 ns sram write cycle t wc t wc write cycle time 35 ? ns t pwe t wp write pulse width 25 ? ns t sce t cw chip enable to end of write 25 ? ns t sd t dw data setup to end of write 12 ? ns t hd t dh data hold after end of write 0 ? ns t aw t aw address setup to end of write 25 ? ns t sa t as address setup to start of write 0 ? ns t ha t wr address hold after end of write 0 ? ns t hzwe [12, 13, 14] t wz write enable to output disable ? 13 ns t lzwe [12, 13] t ow output active after end of write 3 ? ns notes 9. test conditions assume signal transition time of 1.8 ns or less, timing reference levels of v ccq /2, input pulse levels of 0 to v cc q(typ) , and output loading of the specified i ol /i oh and load capacitance shown in figure 3 on page 9 . 10. we must be high during sram read cycles. 11. device is continuously selected with ce and oe low. 12. these parameters are guaranteed by design and are not tested. 13. measured 200 mv from steady state output voltage. 14. if we is low when ce goes low, the outputs remain in the high-impedance state.
cy14v256la document number: 001-76295 rev. *b page 11 of 22 switching waveforms figure 4. sram read cycle #1 (address controlled) [15, 16, 17] figure 5. sram read cycle #2 (ce and oe controlled) [15, 17] address data output address valid previous data valid output data valid t rc t aa t oha address valid address data output output data valid standby active high impedance ce oe i cc t hzce t rc t ace t aa t lzce t doe t lzoe t pu t pd t hzoe notes 15. we must be high during sram read cycles. 16. device is continuously selected with ce and oe low. 17. hsb must remain high during read and write cycles.
cy14v256la document number: 001-76295 rev. *b page 12 of 22 figure 6. sram write cycle #1 (we controlled) [18, 19, 20] figure 7. sram write cycle #2 (ce controlled) [18, 19, 20] switching waveforms (continued) data output data input input data valid high impedance address valid address previous data t wc t sce t ha t aw t pwe t sa t sd t hd t hzwe t lzwe we ce data output data input input data valid high impedance address valid address t wc t sd t hd we ce t sa t sce t ha t pwe notes 18. hsb must remain high during read and write cycles. 19. if we is low when ce goes low, the outputs remain in the high impedance state. 20. ce or we must be > v ih during address transitions.
cy14v256la document number: 001-76295 rev. *b page 13 of 22 autostore/power-up recall over the operating range parameter description cy14v256la unit min max t hrecall [21] power-up recall duration ? 20 ms t store [22] store cycle duration ? 8 ms t delay [23] time allowed to complete sram write cycle ? 25 ns v switch low voltage trigger level for v cc ?2.90v v iodis [24] i/o disable voltage on v ccq ?1.50v t vccrise [25] v cc rise time 150 ? s v hdis [25] hsb output disable voltage on v cc ?1.9v t lzhsb [25] hsb to output active time ? 5 s t hhhd [25] hsb high active time ? 500 ns notes 21. t hrecall starts from the time v cc rises above v switch . 22. if an sram write has not taken place since the last nonvolatile cycle, no autostore or hardware store takes place. 23. on a hardware store and autostore initiation, sram write operation continues to be enabled for time t delay . 24. hsb is not defined below v iodis voltage. 25. these parameters are guaranteed by design and are not tested.
cy14v256la document number: 001-76295 rev. *b page 14 of 22 switching waveforms figure 8. autostore or power-up recall [26] v iodis t vccrise t store t store t hhhd t hhhd t delay t delay t lzhsb t lzhsb t hrecall t hrecall hsb out autostore power- up recall read & write inhibited ( rwi ) power-up recall read & write brown out autostore power-up recall read & write power down autostore note note note v switch v hdis read & write brown out i/o disable v cc v cc v ccq v ccq v ccq note 22 22 27 27 notes 26. read and write cycles are ignored during store, recall, and while v cc is below v switch . 27. during power-up and power-down, hsb glitches when hsb pin is pulled up through an external resistor.
cy14v256la document number: 001-76295 rev. *b page 15 of 22 software controlled store/recall cycle over the operating range parameter [28, 29] description 35 ns unit min max t rc store/recall initiation cycle time 35 ? ns t sa address setup time 0 ? ns t cw clock pulse width 20 ? ns t ha address hold time 0 ? ns t recall recall duration ? 200 s switching waveforms figure 9. ce and oe controlled software store/recall cycle [29] figure 10. autostore enable / disable cycle [29] t rc t rc t sa t cw t cw t sa t ha t lzce t hzce t ha t ha t ha t store /t recall t hhhd t lzhsb high impedance address #1 address #6 address ce oe hsb (store only) dq (data) rwi t delay note 30 t rc t rc t sa t cw t cw t sa t ha t lzce t hzce t ha t ha t ha t delay address #1 address #6 address ce oe dq (data) t ss note rwi 30 notes 28. the software sequence is clocked with ce controlled or oe controlled reads. 29. the six consecutive addresses must be read in the order listed in table 1 on page 5 . we must be high during all six consecutive cycles. 30. dq output data at the sixth read may be invalid since the output is disabled at t delay time.
cy14v256la document number: 001-76295 rev. *b page 16 of 22 hardware store cycle over the operating range parameters description cy14v256la unit min max t dhsb hsb to output active time when write latch not set ? 25 ns t phsb hardware store pulse width 15 ? ns t ss [31, 32] soft sequence processing time ? 100 ? s switching waveforms figure 11. hardware store cycle [33] figure 12. soft sequence processing [31, 32] ~ ~ ~ ~ hsb (in) hsb (out) so rwi hsb (in) hsb (out) rwi t hhhd t store t phsb t delay t lzhsb t delay t dhsb t dhsb t phsb hsb pin is driven high to v ccq only by internal 100 k : resistor, hsb driver is disabled sram is disabled as long as hsb (in) is driven low. write latch not set write latch set address #1 address #6 address #1 address #6 soft sequence command t ss t ss ce address v cc t sa t cw soft sequence command t cw notes 31. this is the amount of time it takes to take action on a soft sequence command. v cc and v ccq power must remain high to effectively register command. 32. commands such as store and recall lock out i/o until operation is complete which further incr eases this time. see the specif ic command. 33. if an sram write has not taken place since the last nonvolatile cycle, no autostore or hardware store takes place.
cy14v256la document number: 001-76295 rev. *b page 17 of 22 truth table for sram operations hsb must remain high for sram operations. table 2. truth table for ce we oe inputs/outputs mode power h x x high z deselect / power-down standby l h l data out (dq 0 ?dq 7 ) read active l h h high z output disabled active l l x data in (dq 0 ?dq 7 ) write active
cy14v256la document number: 001-76295 rev. *b page 18 of 22 ordering information ordering code definitions speed (ns) ordering code package diagram package type operating range 35 CY14V256LA-BA35XIt 51-85128 48-ball fbga industrial CY14V256LA-BA35XI all parts are pb-free. contact your local cypress sa les representative for availability of these parts. option: t - tape and reel blank - std. speed: 35 - 35 ns data bus: l - 8 density: 256 - 256 kb voltage: v - 3.3 v v cc , 1.8 v v ccq cypress cy 14 v 256 l a - ba 35 x i t 14 - nvsram pb-free package: ba - 48-ball fbga temperature: i - industrial (?40 to 85 c) die revision: blank - no rev a - 1 st rev
cy14v256la document number: 001-76295 rev. *b page 19 of 22 package diagrams figure 13. 48-ball fbga (6 10 1.2 mm) ba48b package outline, 51-85128 51-85128 *f
cy14v256la document number: 001-76295 rev. *b page 20 of 22 acronyms document conventions units of measure acronym description ce chip enable cmos complementary metal oxide semiconductor eia electronic industries alliance fbga fine-pitch ball grid array hsb hardware store busy i/o input/output nvsram nonvolatile static random access memory oe output enable sram static random access memory rohs restriction of hazardous substances rwi read and write inhibited we write enable symbol unit of measure c degree celsius k ? kilohm mhz megahertz ? a microampere ? f microfarad ? s microsecond ma milliampere mm millimeter ms millisecond ns nanosecond ? ohm % percent pf picofarad v volt w watt
cy14v256la document number: 001-76295 rev. *b page 21 of 22 document history page document title: cy14v256la , 256-kbit (32 k 8) nvsram document number: 001-76295 rev. ecn no. orig. of change submission date description of change ** 3536107 gvch 03/06/2012 new data sheet. *a 3701497 gvch 08/02/2012 changed status from summary to final. updated dc electrical characteristics (added v vcap parameter and its details, added note 7 and referred the same note in v vcap parameter, also referred note 8 in v vcap parameter). *b 3990042 gvch 05/03/2013 updated maximum ratings (changed ?ambient temperature with power applied? to ?maximum junction temperature?).
document number: 001-76295 rev. *b revised may 3, 2013 page 22 of 22 all products and company names mentioned in this document may be the trademarks of their respective holders. cy14v256la ? cypress semiconductor corporation, 2012-2013. 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 cypress.com/go/plc 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 5


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