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1 features ? low-voltage and standard-voltage operation ? 5.0 (v cc = 4.5v to 5.5v) ? 2.7 (v cc = 2.7v to 5.5v) internally organized 128 x 8 (1k), 256 x 8 (2k), 512 x 8 (4k), 1024 x 8 (8k) or 2048 x 8 (16k) 2-wire serial interface schmitt trigger, filtered inputs for noise suppression bi-directional data transfer protocol 100 khz (2.7v) and 400 khz (5v) compatibility 8-byte page (1k, 2k), 16-byte page (4k, 8k, 16k) write modes partial page writes are allowed self-timed write cycle (10 ms max) high-reliability ? endurance: 100,000 write cycles ? data retention: 100 years ? esd protection: >3000v description the at24c01a/02sc/04sc/08sc/16sc provides 1024/2048/4096/8192/16384 bits of serial, electrically-erasable and programmable read-only memory (eeprom) organized as 128/256/512/1024/2048 words of 8 bits each. the devices are optimized for use in smart card applications where low-power and low-voltage operation may be essential. the devices are available in several standard iso 7816 smart card modules (see ordering information). the entire family is available in both high-voltage (4.5v to 5.5v) and low-voltage (2.7v to 5.5v) versions. all devices are functionally equivalent to atmel serial eeprom products offered in standard ic packages (pdip, soic, eiaj, lap), with the exception of the slave address and write protect functions, which are not required for smart card applications. pin configurations card module contact pad name description iso module contact vcc power supply voltage c1 gnd ground c5 scl serial clock input c3 sda serial data input/output c7 nc no connect c2, c4, c6, c8 nc vcc 2-wire serial eeprom smart card modules 1k (128 x 8) 2k (256 x 8) 4k (512 x 8) 8k (1024 x 8) 16k (2048 x 8) at24c01asc at24c02sc AT24C04SC at24c08sc at24c16sc rev. 1610a ? 05/00
at24c01asc/02sc/04sc/08sc/16sc 2 block diagram pin description serial clock (scl): the scl input is used to positive edge clock data into each eeprom device and negative edge clock data out of each device. serial data (sda): the sda pin is bi-directional for serial data transfer. this pin is open-drain driven and may be wire-ored with any number of other open-drain or open-collector devices. memory organization at24c01asc, 1k serial eeprom: internally organized with 16 pages of 8 bytes each, the 1k requires a 7-bit data word address for random word addressing. at24c02sc, 2k serial eeprom: internally organized with 32 pages of 8 bytes each, the 2k requires an 8-bit data word address for random word addressing. AT24C04SC, 4k serial eeprom: the 4k is internally organized with 32 pages of 16 bytes each. random word addressing chip number requires a 9-bit data word address. at24c08sc, 8k serial eeprom: the 8k is internally organized with 64 pages of 16 bytes each. random word addressing requires a 10-bit data word address. at24c16sc, 16k serial eeprom: the 16k is internally organized with 128 pages of 16 bytes each. random word addressing requires an 11-bit data word address. absolute maximum ratings operating temperature.................................. -55 c to +125 c *notice: stresses beyond those listed under ? absolute maximum ratings ? may cause permanent dam- age to the device. this is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. storage temperature ..................................... -65 c to +150 c voltage on any pin with respect to ground .....................................-1.0v to +7.0v maximum operating voltage .......................................... 6.25v dc output current........................................................ 5.0 ma
at24c01asc/02sc/04sc/08sc/16sc 3 note: 1. this parameter is characterized and is not 100% tested. note: 1. v il min and v ih max are reference only and are not tested. pin capacitance (1) applicable over recommended operating range from t a = 25 c, f = 1.0 mhz, v cc = +2.7v. symbol test condition max units conditions c i/o input/output capacitance (sda) 8 pf v i/o = 0v c in input capacitance (scl) 6 pf v in = 0v dc characteristics applicable over recommended operating range from: t ac = 0 c to +70 c, v cc = +2.7v to +5.5v (unless otherwise noted). symbol parameter test condition min typ max units v cc1 supply voltage 2.7 5.5 v v cc2 supply voltage 4.5 5.5 v i cc supply current v cc = 5.0v read at 100 khz 0.4 1.0 ma i cc supply current v cc = 5.0v write at 100 khz 2.0 3.0 ma i sb1 standby current v cc = 2.7v v in = v cc or gnd 1.6 4.0 a i sb2 standby current v cc = 5.0v v in = v cc or gnd 8.0 18.0 a i li input leakage current v in = v cc or gnd 0.10 3.0 a i lo output leakage current v out = v cc or gnd 0.05 3.0 a v il input low level (1) -0.6 v cc x 0.3 v v ih input high level (1) v cc x 0.7 v cc + 0.5 v v ol output low level v cc = 3.0v i ol = 2.1 ma 0.4 v ac characteristics applicable over recommended operating range from t a = 0 c to +70 c, v cc = +2.7v to +5.5v, cl = 1 ttl gate and 100 pf (unless otherwise noted). symbol parameter 2.7-volt 5.0-volt units min max min max f scl clock frequency, scl 100 400 khz t low clock pulse width low 4.7 1.2 s t high clock pulse width high 4.0 0.6 s t i noise suppression time (1) 100 50 ns t aa clock low to data out valid 0.1 4.5 0.1 0.9 s t buf time the bus must be free before a new transmission can start (1) 4.7 1.2 s t hd.sta start hold time 4.0 0.6 s t su.sta start setup time 4.7 0.6 s t hd.dat data in hold time 0 0 s t su.dat data in setup time 200 100 ns t r inputs rise time (1) 1.0 0.3 s
at24c01asc/02sc/04sc/08sc/16sc 4 note: 1. this parameter is characterized and is not 100% tested. device operation clock and data transitions: the sda pin is nor- mally pulled high with an external device. data on the sda pin may change only during scl low time periods (refer to data validity timing diagram). data changes during scl high periods will indicate a start or stop condition as defined below. start condition: a high-to-low transition of sda with scl high is a start condition that must precede any other command (refer to start and stop definition timing dia- gram). stop condition: a low-to-high transition of sda with scl high is a stop condition. after a read sequence, the stop command will place the eeprom in a standby power mode (refer to start and stop definition timing diagram). acknowledge: all addresses and data words are serially transmitted to and from the eeprom in 8-bit words. each word requires the receiver to acknowledge that it has received a valid command or data byte. during the transmission of commands from the host to the eeprom, the eeprom will send a zero to the host to acknowledge that it has received a valid command byte. this occurs on the ninth clock cycle of the command byte. during read operations, the host will send a zero to the eeprom to acknowledge that it has received a valid data byte and that it requests the next sequential data byte to be transmitted during the subsequent eight clock cycles. this occurs on the ninth clock cycle of the data byte. if the host does not transmit this acknowledge bit, the eeprom will disable the read operation and return to standby mode. standby mode: the at24c01asc/02sc/04sc/ 08sc/16sc features a low-power standby mode that is enabled: (a) upon power-up and (b) after the receipt of the stop bit and the completion of any internal operations. memory reset: after an interruption in protocol, power loss or system reset, any 2-wire part can be reset by follow- ing these steps: 1. clock up to 9 cycles. 2. look for sda high in each cycle while scl is high. 3. create a start condition as sda is high. t f inputs fall time (1) 300 300 ns t su.sto stop setup time 4.7 0.6 s t dh data out hold time 100 50 ns t wr write cycle time 10 10 ms endurance (1) 5.0v, 25 c, page mode 100k 100k write cycles ac characteristics (continued) applicable over recommended operating range from t a = 0 c to +70 c, v cc = +2.7v to +5.5v, cl = 1 ttl gate and 100 pf (unless otherwise noted). symbol parameter 2.7-volt 5.0-volt units min max min max
at24c01asc/02sc/04sc/08sc/16sc 5 bus timing scl: serial clock, sda: serial data i/o write cycle timing scl: serial clock, sda: serial data i/o note: 1. the write cycle time t wr is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle. t wr (1)
at24c01asc/02sc/04sc/08sc/16sc 6 data validity start and stop definition output acknowledge
at24c01asc/02sc/04sc/08sc/16sc 7 device addressing the 1k, 2k, 4k, 8k and 16k eeprom devices all require an 8-bit device address word following a start con- dition to enable the chip for a read or write operation (refer to figure 1). the device address word consists of a mandatory one, zero, one, zero sequence for the first four most significant bits as shown. this is common to all the serial eeprom devices. the next 3 bits of the device address word are the most significant data word address bits for the at24c16sc (16k), which requires a total of 11 address bits. the at24c08sc (8k) requires only 10 total word address bits. the most significant 2 bits are included in the device address word. the unused bit of the device address word should be set to ? 0 ? . the AT24C04SC (4k) requires only 9 total data word address bits. the most significant bit is included in the device address word. the 2 unused bits of the device address word should be set to ? 0 ? . the at24c02sc (2k) and at24c01asc (1k) do not require any address bits in the device address word. the 3 unused bits of the device address word should be set to ? 0 ? . the eighth bit of the device address is the read/write opera- tion select bit. a read operation is initiated if this bit is high and a write operation is initiated if this bit is low. upon a compare of the device address, the eeprom will output a zero (ack). if a successful compare is not made, the chip will return to a standby state (no ack). write operations byte write: a write operation requires an 8-bit data word address following the device address word and acknowledgment. upon receipt of this address, the eeprom will again respond with a zero (ack) and then clock in the first 8-bit data word. following receipt of the 8- bit data word, the eeprom will output a zero (ack) and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition. at this time the eeprom enters an internally-timed write cycle, t wr , to the nonvolatile memory. all inputs are disabled during this write cycle and the eeprom will not respond until the write is complete (refer to figure 2). pag e w rit e: the 1k/2k eeprom is capable of an 8-byte page write, and the 4k, 8k and 16k devices are capable of 16-byte page writes. a page write is initiated the same as a byte write, but the microcontroller does not send a stop condition after the first data word is clocked in. instead, after the eeprom acknowledges receipt of the first data word, the microcon- troller can transmit up to 7 (1k/2k) or 15 (4k, 8k, 16k) more data words. the eeprom will respond with a zero (ack) after each data word received. the microcontroller must terminate the page write sequence with a stop condi- tion (refer to figure 3). the data word address lower 3 (1k/2k) or 4(4k, 8k, 16k) bits are internally incremented following the receipt of each data word. the higher data word address bits are not incre- mented, retaining the memory page row location. when the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. if more than 8 (1k/2k) or 16 (4k, 8k, 16k) data words are transmitted to the eeprom, the data word address will ? roll over ? and previous data will be overwrit- ten. acknowledge polling: once the internally timed write cycle has started and the eeprom inputs are dis- abled, acknowledge polling can be initiated. this involves sending a start condition followed by the device address word. the read/write bit is representative of the operation desired. only if the internal write cycle has completed will the eeprom respond with a zero (ack), allowing the read or write sequence to continue. read operations read operations are initiated the same way as write opera- tions, with the exception that the read/write select bit in the device address word is set to one. there are three read operations: current address read, random address read and sequential read. current address read: the internal data word address counter maintains the last address accessed dur- ing the last read or write operation, incremented by one. this address stays valid between operations as long as the chip power is maintained. the address ? rollover ? during read is from the last byte of the last memory page to the first byte of the first page. the address ? rollover ? during write is from the last byte of the current page to the first byte of the same page. once the device address with the read/write select bit set to ? 1 ? is clocked in and acknowledged by the eeprom, the current address data word is serially clocked out. the microcontroller does not respond with an input zero, but does generate a following stop condition (refer to figure 4). random read: a random read requires a ? dummy ? byte write sequence to load in the data word address. once the device address word and data word address are clocked in and acknowledged by the eeprom, the microcontroller must generate another start condition. the microcontroller now initiates a current address read by sending a device address with the read/write select bit high. the eeprom acknowledges the device address and serially clocks out the data word. the microcontroller does not respond with a zero (no ack) but does generate a following stop condi- tion (refer to figure 5).
at24c01asc/02sc/04sc/08sc/16sc 8 sequential read: sequential reads are initiated by either a current address read or a random address read. after the microcontroller receives a data word, it responds with an acknowledge. as long as the eeprom receives an acknowledge, it will continue to increment the data word address and serially clock out sequential data words. when the memory address limit is reached, the data word address will ? rollover ? and the sequential read will continue. the sequential read operation is terminated when the microcontroller does not respond with a zero (no ack) but does generate a following stop condition (refer to figure 6). figure 1. device address figure 2. byte write figure 3. page write (* = don ? t care bit for 1k) note: po, p1, p2 = data word address bits
at24c01asc/02sc/04sc/08sc/16sc 9 figure 4. current address read figure 5. random read (* = don ? t care bit for 1k) figure 6. sequential read
at24c01asc/02sc/04sc/08sc/16sc 10 at24c01asc ordering information note: 1. formal drawings may be obtained from an atmel sales office. ordering code package voltage range operation range at24c01asc - 09at - 2.7 at24c01asc - 09bt - 2.7 at24c01asc - 09ct - 2.7 at24c01asc - 09dt - 2.7 at24c01asc - 09et - 2.7 at24c01asc - 09ft - 2.7 at24c01asc - 09gt - 2.7 at24c01asc - 09ht - 2.7 m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module m3 - g module m3 - h module 2.7v - 5.5v commercial (0 c to 70 c) at24c01asc - 09at at24c01asc - 09bt at24c01asc - 09ct at24c01asc - 09dt at24c01asc - 09et at24c01asc - 09ft at24c01asc - 09gt at24c01asc - 09ht m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module m3 - g module m3 - h module 4.5v - 5.5v commercial (0 c to 70 c) package type (1) m2 - a module m2 iso 7816 smart card module m2 - b module m2 iso 7816 smart card module with atmel logo m4 - c module m4 iso 7816 smart card module m4 - d module m4 iso 7816 smart card module with atmel logo m2 - e module m2 iso 7816 smart card module m2 - f module m2 iso 7816 smart card module m3 - g module m3 iso 7816 smart card module m3 - h module m3 iso 7816 smart card module with atmel logo
at24c01asc/02sc/04sc/08sc/16sc 11 at24c02sc ordering information note: 1. formal drawings may be obtained from an atmel sales office. ordering code package voltage range operation range at24c02sc - 09at - 2.7 at24c02sc - 09bt - 2.7 at24c02sc - 09ct - 2.7 at24c02sc - 09dt - 2.7 at24c02sc - 09et - 2.7 at24c02sc - 09ft - 2.7 m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 2.7v - 5.5v commercial (0 c to 70 c) at24c02sc - 09at at24c02sc - 09bt at24c02sc - 09ct at24c02sc - 09dt at24c02sc - 09et at24c02sc - 09ft m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 4.5v - 5.5v commercial (0 c to 70 c) AT24C04SC ordering information ordering code package voltage range operation range AT24C04SC - 09at - 2.7 AT24C04SC - 09bt - 2.7 AT24C04SC - 09ct - 2.7 AT24C04SC - 09dt - 2.7 AT24C04SC - 09et - 2.7 AT24C04SC - 09ft - 2.7 m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 2.7v - 5.5v commercial (0 c to 70 c) AT24C04SC - 09at AT24C04SC - 09bt AT24C04SC - 09ct AT24C04SC - 09dt AT24C04SC - 09et AT24C04SC - 09ft m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 4.5v - 5.5v commercial (0 c to 70 c) package type (1) m2 - a module m2 iso 7816 smart card module m2 - b module m2 iso 7816 smart card module with atmel logo m4 - c module m4 iso 7816 smart card module m4 - d module m4 iso 7816 smart card module with atmel logo m2 - e module m2 iso 7816 smart card module m2 - f module m2 iso 7816 smart card module m3 - g module m3 iso 7816 smart card module m3 - h module m3 iso 7816 smart card module with atmel logo
at24c01asc/02sc/04sc/08sc/16sc 12 note: 1. formal drawings may be obtained from an atmel sales office. at24c08sc ordering information ordering code package voltage range operation range at24c08sc - 09at - 2.7 at24c08sc - 09bt - 2.7 at24c08sc - 09ct - 2.7 at24c08sc - 09dt - 2.7 at24c08sc - 09et - 2.7 at24c08sc - 09ft - 2.7 m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 2.7v - 5.5v commercial (0 c to 70 c) at24c08sc - 09at at24c08sc - 09bt at24c08sc - 09ct at24c08sc - 09dt at24c08sc - 09et at24c08sc - 09ft m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 4.5v - 5.5v commercial (0 c to 70 c) at24c16sc ordering information ordering code package voltage range operation range at24c16sc - 09at - 2.7 at24c16sc - 09bt - 2.7 at24c16sc - 09ct - 2.7 at24c16sc - 09dt - 2.7 at24c16sc - 09et - 2.7 at24c16sc - 09ft - 2.7 m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 2.7v - 5.5v commercial (0 c to 70 c) at24c16sc - 09at at24c16sc - 09bt at24c16sc - 09ct at24c16sc - 09dt at24c16sc - 09et at24c16sc - 09ft m2 - a module m2 - b module m4 - c module m4 - d module m2 - e module m2 - f module 4.5v - 5.5v commercial (0 c to 70 c) package type (1) m2 - a module m2 iso 7816 smart card module m2 - b module m2 iso 7816 smart card module with atmel logo m4 - c module m4 iso 7816 smart card module m4 - d module m4 iso 7816 smart card module with atmel logo m2 - e module m2 iso 7816 smart card module m2 - f module m2 iso 7816 smart card module m3 - g module m3 iso 7816 smart card module m3 - h module m3 iso 7816 smart card module with atmel logo
at24c01asc/02sc/04sc/08sc/16sc 13 smart card modules m2 - a module - ordering code: 09at module size: m2 dimension (1) : 12.6 x 11.4 mm glob top: black, square: 8.6 x 8.6 mm thickness: 0.58 mm max. pitch: 14.25 mm m2 - b module - ordering code: 09bt module size: m2 dimension (1) : 12.6 x 11.4 mm glob top: black, square: 8.6 x 8.6 mm thickness: 0.58 mm max. pitch: 14.25 mm m4 - c module - ordering code: 09ct module size: m4 dimension (1) : 12.6 x 12.6 mm glob top: black, square: 8.6 x 8.6 mm thickness: 0.58 mm pitch: 14.25 mm m4 - d module - ordering code: 09dt module size: m4 dimension (1) : 12.6 x 12.6 mm glob top: black, square: 8.6 x 8.6 mm thickness: 0.58 mm max. pitch: 14.25 mm m2 - e module - ordering code: 09et module size: m2 dimension (1) : 12.6 x 11.4 mm glob top: clear, round: ? 7.5 mm max. thickness: 0.58 mm max. pitch: 14.25 mm m2 - f module - ordering code: 09ft module size: m2 dimension (1) : 12.6 x 11.4 mm glob top: clear, round: ? 8.0 mm max. thickness: 0.58 mm max. pitch: 14.25 mm m3 - g module - ordering code: 09gt module size: m3 dimension (1) : 10.6 x 8.0 mm glob top: clear, round: ? 6.5 mm max. thickness: 0.58 mm max. pitch: 9.5 mm m3 - h module - ordering code: 09ht module size: m3 dimension (1) : 10.6 x 8.0 mm glob top: clear, round: ? 6.5 mm max. thickness: 0.58 mm max. pitch: 9.5 mm note: 1. the module dimensions listed refer to the dimensions of the exposed metal contact area. the actual dimensions of the module after excise or punching from the carrier tape are generally 0.4 mm greater in both directions (i.e. a punched m2 module will yield 13.0 x 11.8 mm).
? atmel corporation 2000. atmel corporation makes no warranty for the use of its products, other than those expressly contained in the company ? s standard war- ranty which is detailed in atmel ? s terms and conditions located on the company ? s web site. the company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any tim e without notice, and does not make any commitment to update the information contained herein. no licenses to patents or other intellectu al prop- erty of atmel are granted by the company in connection with the sale of atmel products, expressly or by implication. atmel ? s products are not authorized for use as critical components in life support devices or systems. atmel headquarters atmel operations corporate headquarters 2325 orchard parkway san jose, ca 95131 tel (408) 441-0311 fax (408) 487-2600 europe atmel u.k., ltd. coliseum business centre riverside way camberley, surrey gu15 3yl england tel (44) 1276-686-677 fax (44) 1276-686-697 asia atmel asia, ltd. room 1219 chinachem golden plaza 77 mody road tsimhatsui east kowloon hong kong tel (852) 2721-9778 fax (852) 2722-1369 japan atmel japan k.k. 9f, tonetsu shinkawa bldg. 1-24-8 shinkawa chuo-ku, tokyo 104-0033 japan tel (81) 3-3523-3551 fax (81) 3-3523-7581 atmel colorado springs 1150 e. cheyenne mtn. blvd. colorado springs, co 80906 tel (719) 576-3300 fax (719) 540-1759 atmel rousset zone industrielle 13106 rousset cedex france tel (33) 4-4253-6000 fax (33) 4-4253-6001 fax-on-demand north america: 1-(800) 292-8635 international: 1-(408) 441-0732 e-mail literature@atmel.com web site http://www.atmel.com bbs 1-(408) 436-4309 printed on recycled paper. 1610a ? 05/00/xm marks bearing ? and/or ? are registered trademarks and trademarks of atmel corporation. terms and product names in this document may be trademarks of others.

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