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1 ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice doc. no. 1039, rev. g cat24wc32/64 32k/64k-bit i 2 c serial cmos eeprom d out ack sense amps shift registers control logic word address buffers start/stop logic state counters slave address comparators e 2 prom 128/256 x 256 v cc external load column decoders xdec data in storage high voltage/ timing control v ss wp scl a 0 a1 a2 sda 128/256 256 v cc wp scl sda 1 2 3 4 8 7 6 5 a 0 v cc wp scl sda 1 2 3 4 8 7 6 5 a 1 a 2 v ss a 0 a 1 a 2 v ss description the cat24wc32/64 is a 32k/64k-bit serial cmos e 2 prom internally organized as 4096/8192 words of 8 bits each. catalysts advanced cmos technology sub- stantially reduces device power requirements. the * catalyst semiconductor is licensed by philips corporation to carry the i 2 c bus protocol. commercial, industrial, automotive and extended automotive temperature ranges write protection C entire array protected when wp at v ih 1,000,000 program/erase cycles 100 year data retention cat24wc32/64 features a 32-byte page write buffer. the device operates via the i 2 c bus serial interface and is available in 8-pin dip or 8-pin soic packages. pin configuration block diagram pin functions pin name function a0, a1, a2 device address inputs sda serial data/address scl serial clock wp write protect v cc +1.8v to +5.5v power supply v ss ground 24wc32/64 f02 400 khz i 2 c bus compatible* 1.8 to 5.5 volt read and write operation cascadable for up to eight devices 32/64-byte page write buffer self-timed write cycle with auto-clear 8-pin dip or 8-pin soic schmitt trigger inputs for noise protection features dip package (p, l, gl) soic package (j, w, k, x, gw, gx)
cat24wc32/64 2 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice absolute maximum ratings* temperature under bias ................. C55 c to +125 c storage temperature ....................... C65 c to +150 c voltage on any pin with respect to ground (1) ........... C2.0v to +v cc + 2.0v v cc with respect to ground ............... C2.0v to +7.0v package power dissipation capability (ta = 25 c) ................................... 1.0w lead soldering temperature (10 secs) ............ 300 c output short circuit current (2) ........................ 100ma *comment stresses above those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. exposure to any absolute maximum rating for extended periods may affect device performance and reliability. limits symbol parameter min. typ. max. units test conditions i cc power supply current 3 ma f scl = 100 khz i sb (5) standby current (v cc = 5v) 1 av in = gnd or v cc i li input leakage current 10 av in = gnd to v cc i lo output leakage current 10 av out = gnd to v cc v il input low voltage C1 v cc x 0.3 v v ih input high voltage v cc x 0.7 v cc + 0.5 v v ol1 output low voltage (v cc = +3.0v) 0.4 v i ol = 3.0 ma v ol2 output low voltage (v cc = +1.8v) 0.5 v i ol = 1.5 ma d.c. operating characteristics v cc = +1.8v to +5.5v, unless otherwise specified. capacitance t a = 25 c, f = 1.0 mhz, v cc = 5v symbol test max. units conditions c i/o (3) input/output capacitance (sda) 8 pf v i/o = 0v c in (3) input capacitance (a0, a1, a2, scl, wp) 6 pf v in = 0v note: (1) the minimum dc input voltage is C0.5v. during transitions, inputs may undershoot to C2.0v for periods of less than 20 ns. ma ximum dc voltage on output pins is v cc +0.5v, which may overshoot to v cc + 2.0v for periods of less than 20ns. (2) output shorted for no more than one second. no more than one output shorted at a time. (3) these parameters are tested initially and after a design or process change that affects the parameter according to appropria te aec-q100 and jedec test methods. (4) latch-up protection is provided for stresses up to 100 ma on address and data pins from C1v to v cc +1v. (5) maximum standby current (i sb ) = 10 a for the automotive and extended automotive temperature range. reliability characteristics symbol parameter min. max. units n end (3) endurance 1,000,000 cycles/byte t dr (3) data retention 100 years v zap (3) esd susceptibility 2000 volts i lth (3)(4) latch-up 100 ma
cat24wc32/64 3 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice the write cycle time is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. during the write cycle, the bus interface circuits are disabled, sda is allowed to remain high, and the device does not respond to its slave address. a.c. characteristics v cc = +1.8v to +5.5v, unless otherwise specified output load is 1 ttl gate and 100pf read & write cycle limits power-up timing (1)(2) symbol parameter max. units t pur power-up to read operation 1 ms t puw power-up to write operation 1 ms note: (1) this parameter is tested initially and after a design or process change that affects the parameter. (2) t pur and t puw are the delays required from the time v cc is stable until the specified operation can be initiated. write cycle limits symbol parameter min. typ. max units t wr write cycle time 10 ms l o b m y sr e t e m a r a p 8 . 1 - x x c w 4 2 t a cx x c w 4 2 t a c s t i n u v 5 . 5 - v 8 . 1v 5 . 5 - v 5 . 2v 5 . 5 - v 5 . 4 . n i m. x a m. n i m. x a m. n i m. x a m f l c s y c n e u q e r f k c o l c0 0 10 0 10 0 4z h k t i ) 1 ( t a t n a t s n o c e m i t n o i s s e r p p u s e s i o n s t u p n i a d s , l c s 0 0 20 0 20 0 2s n t a a k c a d n a t u o a t a d a d s o t w o l l c s t u o 5 . 35 . 31 s t f u b ) 1 ( e r o f e b e e r f e b t s u m s u b e h t e m i t t r a t s n a c n o i s s i m s n a r t w e n a 7 . 47 . 42 . 1 s t a t s : d h e m i t d l o h n o i t i d n o c t r a t s446 . 0 s t w o l d o i r e p w o l k c o l c7 . 47 . 42 . 1 s t h g i h d o i r e p h g i h k c o l c446 . 0 s t a t s : u s e m i t p u t e s n o i t i d n o c t r a t s ) n o i t i d n o c t r a t s d e t a e p e r a r o f ( 7 . 47 . 46 . 0 s t t a d : d h e m i t d l o h n i a t a d000s n t t a d : u s e m i t p u t e s n i a t a d0 50 50 5s n t r ) 1 ( e m i t e s i r l c s d n a a d s113 . 0 s t f ) 1 ( e m i t l l a f l c s d n a a d s0 0 30 0 30 0 3s n t o t s : u s e m i t p u t e s n o i t i d n o c p o t s446 . 0 s t h d e m i t d l o h t u o a t a d0 0 10 0 10 0 1s n
cat24wc32/64 4 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice functional description the cat24wc32/64 supports the i 2 c bus data trans- mission protocol. this inter-integrated circuit bus proto- col defines any device that sends data to the bus to be a transmitter and any device receiving data to be a receiver. the transfer is controlled by the master device which generates the serial clock and all start and stop conditions for bus access. the cat24wc32/64 operates as a slave device. both the master device and slave device can operate as either transmitter or re- ceiver, but the master device controls which mode is activated. pin descriptions scl: serial clock the serial clock input clocks all data transferred into or out of the device. sda: serial data/address the bidirectional serial data/address pin is used to transfer all data into and out of the device. the sda pin is an open drain output and can be wire-ored with other open drain or open collector outputs. a0, a1, a2: device address inputs these pins are hardwired or left unconnected (for hard- ware compatibility with cat24wc16). when hardwired, up to eight cat24wc32/64s may be addressed on a single bus system (refer to device addressing ). when the pins are left unconnected, the default values are zeros. wp: write protect this input, when tied to gnd, allows write operations to the entire memory. for cat24wc32/64 when this pin is tied to vcc, the entire memory is write protected. when left floating, memory is unprotected. 5020 fhd f05 figure 3. start/stop timing figure 2. write cycle timing figure 1. bus timing start bit sda stop bit scl 5020 fhd f04 t wr stop condition start condition address ack 8th bit byte n scl sda 5020 fhd f03 t high scl sda in sda out t low t f t low t r t buf t su:sto t su:dat t hd:dat t hd:sta t su:sta t aa t dh
cat24wc32/64 5 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice i 2 c bus protocol the features of the i 2 c bus protocol are defined as follows: (1) data transfer may be initiated only when the bus is not busy. (2) during a data transfer, the data line must remain stable whenever the clock line is high. any changes in the data line while the clock line is high will be interpreted as a start or stop condition. start condition the start condition precedes all commands to the device, and is defined as a high to low transition of sda when scl is high. the cat24wc32/64 monitors the sda and scl lines and will not respond until this condition is met. stop condition a low to high transition of sda when scl is high determines the stop condition. all operations must end with a stop condition. device addressing the bus master begins a transmission by sending a start condition. the master sends the address of the particular slave device it is requesting. the four most significant bits of the 8-bit slave address are fixed as 1010 (fig. 5). the next three bits (a2, a1, a0) are the device address bits; up to eight 32k/64k devices may to be connected to the same bus. these bits must figure 4. acknowledge timing 5027 fhd f07 figure 5. slave address bits 5020 fhd f06 acknowledge 1 start scl from master 89 data output from transmitter data output from receiver 1 0 1 0 a2 a1 a0 r/w compare to the hardwired input pins, a2, a1 and a0. the last bit of the slave address specifies whether a read or write operation is to be performed. when this bit is set to 1, a read operation is selected, and when set to 0, a write operation is selected. after the master sends a start condition and the slave address byte, the cat24wc32/64 monitors the bus and responds with an acknowledge (on the sda line) when its address matches the transmitted slave address. the cat24wc32/64 then performs a read or write opera- tion depending on the state of the r/w bit. acknowledge after a successful data transfer, each receiving device is required to generate an acknowledge. the acknowledg- ing device pulls down the sda line during the ninth clock cycle, signaling that it received the 8 bits of data. the cat24wc32/64 responds with an acknowledge after receiving a start condition and its slave address. if the device has been selected along with a write operation, it responds with an acknowledge after receiv- ing each 8-bit byte. when the cat24wc32/64 begins a read mode it transmits 8 bits of data, releases the sda line, and monitors the line for an acknowledge. once it receives this acknowledge, the cat24wc32/64 will continue to transmit data. if no acknowledge is sent by the master, the device terminates data transmission and waits for a stop condition. the master must then issue a stop condition to return the cat24wc32/64 to the standby power mode and place the device in a known state.
cat24wc32/64 6 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice a 15 Ca 8 slave address s a c k a c k a c k bus activity: master sda line s t a r t a 7 Ca 0 byte address data n+31/63 data a c k s t o p a c k data n a c k p a c k * x xx a 15 Ca 8 slave address s a c k a c k data a c k s t o p p bus activity: master sda line s t a r t a 7 Ca 0 byte address a c k * x xx write operations byte write in the byte write mode, the master device sends the start condition and the slave address information (with the r/ w bit set to zero) to the slave device. after the slave generates an acknowledge, the master sends two 8-bit address words that are to be written into the address pointers of the cat24wc32/64. after receiving another acknowledge from the slave, the master device transmits the data to be written into the addressed memory location. the cat24wc32/64 acknowledges once more and the master generates the stop condi- tion. at this time, the device begins an internal program- ming cycle to nonvolatile memory. while the cycle is in progress, the device will not respond to any request from the master device. page write the cat24wc32/64 writes up to 32/64 bytes of data, in a single write cycle, using the page write operation. cat24wc32/64, die revision b = 32 byte page. cat24wc64, die revision d = 64 byste page. the page write operation is initiated in the same manner as the byte write operation, however instead of terminating after the initial byte is transmitted, the master is allowed to send up to 31/63 additional bytes. after each byte has been transmitted, cat24wc32/64 will respond with an acknowledge, and internally increment the five low order address bits by one. the high order bits remain un- changed. if the master transmits more than 32/64 bytes before sending the stop condition, the address counter wraps around, and previously transmitted data will be overwritten. when all 32/64 bytes are received, and the stop condition has been sent by the master, the internal programming cycle begins. at this point, all received data is written to the cat24wc32/64 in a single write cycle. acknowledge polling disabling of the inputs can be used to take advantage of the typical write cycle time. once the stop condition is issued to indicate the end of the host's write operation, cat24wc32/64 initiates the internal write cycle. ack polling can be initiated immediately. this involves issu- ing the start condition followed by the slave address for a write operation. if cat24wc32/64 is still busy with the write operation, no ack will be returned. if cat24wc32/64 has completed the write operation, an ack will be returned and the host can then proceed with the next read or write operation. write protection the write protection feature allows the user to protect against inadvertent programming of the memory array. if the wp pin is tied to v cc , the entire memory array is protected and becomes read only. the cat24wc32/64 24wc32/64 f09 figure 7. page write timing figure 6. byte write timing 24wc32/64 f08 * = don't care bit for 24wc32 x= don't care bit
cat24wc32/64 7 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice will accept both slave and byte addresses, but the memory location accessed is protected from program- ming by the devices failure to send an acknowledge after the first byte of data is received. read operations the read operation for the cat24wc32/64 is initiated in the same manner as the write operation with one exception, that r/ w bit is set to one. three different read operations are possible: immediate/current ad- dress read, selective/random read and sequential read. immediate/current address read the cat24wc32/64s address counter contains the address of the last byte accessed, incremented by one. in other words, if the last read or write access was to address n, the read immediately following would access data from address n+1. if n=e (where e=4095 for 24wc32 and e=8191 for 24wc64), then the counter will wrap around to address 0 and continue to clock out data. after the cat24wc32/64 receives its slave ad- dress information (with the r/ w bit set to one), it issues an acknowledge, then transmits the 8 bit byte requested. the master device does not send an acknowledge, but will generate a stop condition. selective/random read selective/random read operations allow the master device to select at random any memory location for a read operation. the master device first performs a dummy write operation by sending the start condi- tion, slave address and byte addresses of the location it wishes to read. after cat24wc32/64 acknowledges, the master device sends the start condition and the slave address again, this time with the r/ w bit set to one. the cat24wc32/64 then responds with its acknowl- edge and sends the 8-bit byte requested. the master device does not send an acknowledge but will generate a stop condition. sequential read the sequential read operation can be initiated by either the immediate address read or selective read operations. after the cat24wc32/64 sends the initial 8- bit byte requested, the master will respond with an acknowledge which tells the device it requires more data. the cat24wc32/64 will continue to output an 8- bit byte for each acknowledge sent by the master. the operation will terminate when the master fails to respond with an acknowledge, thus sending the stop condition. the data being transmitted from cat24wc32/64 is outputted sequentially with data from address n fol- lowed by data from address n+1. the read operation address counter increments all of the cat24wc32/64 address bits so that the entire memory array can be read during one operation. if more than e (where e=4095 for 24wc32 and e=8191 for 24wc64) bytes are read out, the counter will wrap around and continue to clock out data bytes. figure 8. immediate address read timing 24wc32/64 f10 scl sda 8th bit stop no ack data out 89 slave address s a c k bus activity: master sda line s t a r t n o a c k data s t o p p
cat24wc32/64 8 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice a 15 Ca 8 slave address s a c k a c k a c k bus activity: master sda line s t a r t a 7 Ca 0 byte address slave address s a c k n o a c k s t a r t data p s t o p xx x* figure 9. selective read timing 24wc32/64 f11 * = don't care bit for 24wc32 x= don't care bit figure 10. sequential read timing 5020 fhd f12 bus activity: master sda line data n+x data n a c k a c k data n+1 a c k s t o p n o a c k data n+2 a c k p slave address
cat24wc32/64 9 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice notes: 1. complies with jedec publication 95 ms001 dimensions; however, some of the dimensions may be more stringent. 2. all linear dimensions are in inches and parenthetically in millimeters. 0.180 (4.57) max 0.015 (0.38) 0.100 (2.54) bsc 0.014 (0.36) 0.022 (0.56) 0.245 (6.17) 0.295 (7.49) 0.045 (1.14) 0.060 (1.52) 0.110 (2.79) 0.150 (3.81) 0.120 (3.05) 0.150 (3.81) 0.300 (7.62) 0.325 (8.26) 0.310 (7.87) 0.380 (9.65) 0.355 (9.02) 0.400 (10.16) 8-lead 300 mil wide plastic dip (p, l, gl) 8-lead 150 mil wide soic (j, w, gw) notes: 1. complies with jedec publication 95 ms-012 dimensions; however, some dimensions may be more stringent. 2. all linear dimensions are in inches and parenthetically in millimeters. 0.1497 (3.80) 0.1574 (4.00) 0.2284 (5.80) 0.2440 (6.20) 0.0532 (1.35) 0.0688 (1.75) 0.0040 (0.10) 0.0098 (0.25) 0.050 (1.27) bsc 0.013 (0.33) 0.020 (0.51) 08 0.0075 (0.19) 0.0098 (0.25) 0.0099 (0.25) 0.0196 (0.50) x 45 0.016 (0.40) 0.050 (1.27) 0.1890 (4.80) 0.1968 (5.00)
cat24wc32/64 10 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice 8-lead 210 mil wide soic (k, x, gx) note: 1. all linear dimensions are in inches and parenthetically in millimeters. 0.205 (5.20) 0.213 (5.40) 0.303 (7.70) 0.318 (8.10) 4 ref 0.008 (0.20) 0.025 (0.65) 0.0137 (0.35) 0.0177 (0.45) 0.080 (2.03) max 0.205 (5.15) 0.210 (5.35) 0.0267 (0.68) 0.0303 (0.77) 0.046 (1.17) 0.054 (1.37)
cat24wc32/64 11 doc. no. 1039, rev. g ? 2005 by catalyst semiconductor, inc. characteristics subject to change without notice ordering information notes: (1) the device used in the above example is a cat24wc32ji-1.8te13 (soic, industrial temperature, 1.8 volt to 5.5 volt operating voltage, tape & reel) (2) product die revision letter is marked on top of the package as a suffix to the production date code (e.g., aywwb). for addit ional information, please contact your catalyst sales office. package prefix device # suffix 24wc32 j i te13 product number 24wc32: 32k 24wc64: 64k tape & reel operating voltage blank = 2.5 to 5.5v 1.8 = 1.8 to 5.5v -1.8 cat temperature range blank = commercial (0?c to +70?c) i = industrial (-40?c to +85?c) a = automotive (-40? to +105?c) optional company id e = extended (-40?c to +125?c) p: pdip j: soic, jedec k: soic, eiaj l: pdip (lead-free, halogen-free) w: soic, jedec (lead-free, halogen-free) x: soic, eiaj (lead-free, halogen-free) gl: pdip (lead-free, halogen-free, nipdau lead plating) gw: soic, jedec (lead-free, halogen-free, nipdau lead plating) gx: soic, eiaj (lead-free, halogen-free, nipdau lead plating) rev d (2) die revision 24wc32: b, d 24wc64: b, d
catalyst semiconductor, inc. corporate headquarters 1250 borregas avenue sunnyvale, ca 94089 phone: 408.542.1000 fax: 408.542.1200 www.caalyst-semiconductor.com copyrights, trademarks and patents trademarks and registered trademarks of catalyst semiconductor include each of the following: dpp ae 2 minipot catalyst semiconductor has been issued u.s. and foreign patents and has patent applications pending that protect its products. for a complete list of patents issued to catalyst semiconductor contact the companys corporate office at 408.542.1000. catalyst semiconductor makes no warranty, representation or guarantee, express or implied, regarding the suitability of its products for any particular purpose, nor that the use of its products will not infringe its intellectual property rights or the rights of third parties with respect to any particular use or application and specifically disclaims any and all liability aris ing out of any such use or application, including but not limited to, consequential or incidental damages. catalyst semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgica l implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the catalyst semic onductor product could create a situation where personal injury or death may occur. catalyst semiconductor reserves the right to make changes to or discontinue any product or service described herein without not ice. products with data sheets labeled "advance information" or "preliminary" and other products described herein may not be in production or offered for sale . catalyst semiconductor advises customers to obtain the current version of the relevant product information before placing order s. circuit diagrams illustrate typical semiconductor applications and may not be complete. publication #: 1039 revison: g issue date: 08/17/05 revision history date rev. reason 7/7/2004 e added die revision to ordering information 7/28/2004 f updated features updated dc operating characteristics and notes 08/17/2005 g edit features edit pin functions edit reliability characteristics edit d.c. operating characteristics edit a.c. characteristics add package dimensions edit ordering information

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