(VCC 4.5V 5.5V) (VCC 2.7V 5.5V) (VCC 2.5V 5.5V) (VCC 1.8V 5.5V) Intern
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Utilizes Different Array Protection Compared AT24C02/04/08
(VCC 4.5V 5.5V) (VCC 2.7V 5.5V) (VCC 2.5V 5.5V) (VCC 1.8V 5.5V) Internally Organized (2K), (4K) 1024 (8K) 2-wire Serial Interface Schmitt Trigger, Filtered Inputs Noise Supperssion Bidirectional Data Transfer Protocol (1.8V, 2.5V, 2.7V) (5V) Clock Rate 8-byte Page (2K), 16-byte Page (4K, Write Modes Partial Page Writes Allowed Self-timed Write Cycle max) High Reliability Endurance: Million Write Cycles Data Retention: Years Protection: >3000V Automotive Grade Extended Temperature Devices Available 8-lead JEDEC SOIC, 8-pin PDIP, 8-lead TSSOP Packages
2-wire Serial EEPROM
(256 (512 (1024
Description
AT24C02A/04A/08A provides 2048/4096/8192 bits serial electrically erasable programmable read only memory (EEPROM) organized 256/512/1024 words bits each. device optimized many industrial commercial applications where power voltage operation essential. AT24C02A/04A/08A available space saving 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead TSSOP (AT24C02A/04A) packages accessed 2-wire serial interface. addition, entire family available 5.0V (4.5V 5.5V), 2.7V (2.7V 5.5V), 2.5V (2.5V 5.5V) 1.8V (1.8V 5.5V) versions.
AT24C02A AT24C04A AT24C08A
Configurations
Name Function Address Inputs Serial Data Serial Clock Input Write Protect Connect
8-pin PDIP
AT24C02A/04A/
8-lead SOIC
8-lead TSSOP
Rev. 0976C-04/01
Absolute Maximum Ratings*
Operating Temperature. -55°C +125°C Storage Temperature -65°C +150°C Voltage with Respect Ground .-1.0V +7.0V Maximum Operating Voltage 6.25V Output Current. *NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
Block Diagram
Description
SERIAL CLOCK (SCL): input used positive edge clock data into each EEPROM device negative edge clock data each device. SERIAL DATA (SDA): bidirectional serial data transfer. This open-drain driven wire-ORed with number other open-drain open collector devices. DEVICE/PAGE ADDRESSES (A2, A0): pins device address inputs that hard wired AT24C02A. many eight devices addressed single system (device addressing discussed detail under Device Addressing section). AT24C04A uses inputs hard wire addressing total four devices addressed single system. connect. AT24C08A only uses input hardwire addr total addressed single system. pins connects. WRITE PROTECT (WP): AT24C02A/04A/08A Write Protect that provides hardware data protection. Write Protect allows normal read/write operations when connected ground (GND). When Write Protect
AT24C02A/04A/08A
AT24C02A/04A/08A
connected write protection feature enabled operates shown following table.
Memory Organization
AT24C02A, SERIAL EEPROM: Internally organized with pages 1-byte each, requires data word address random word addressing. AT24C04A, SERIAL EEPROM: internally organized with pages 2-bytes each. Random word addressing requires data word address. AT24C08A, SERIAL EEPROM: internally organized with blocks pages 4-bytes each. Random word addressing requires data word address.
Status
Part Array Protected 24C02A Upper Half (1K) Array 24C04A Upper Half (2K) Array 24C08A Full (8K) Array
Normal Read/Write Operations
Capacitance
Applicable over recommended operating range from 25°C, MHz, +1.8V.
Symbol CI/O Note: Test Condition Input/Output Capacitance (SDA) Input Capacitance (A0, SCL) This parameter characterized 100% tested. Units Conditions VI/O
Characteristics
Applicable over recommended operating range from: -40°C +85°C, +1.8V +5.5V, +70°C, +1.8V +5.5V (unless otherwise noted).
Symbol VCC1 VCC2 VCC3 VCC4 ISB1 ISB2 ISB3 ISB4 VOL2 VOL1 Note: Parameter Supply Voltage Supply Voltage Supply Voltage Supply Voltage Supply Current 5.0V Supply Current 5.0V Standby Current 1.8V Standby Current 2.5V Standby Current 2.7V Standby Current 5.0V Input Leakage Current Output Leakage Current Input Level
Test Condition
Units
READ WRITE VOUT -0.6 0.15
0.10 0.05
18.0
Input High Level Output Level 3.0V Output Level 1.8V
reference only tested.
Characteristics
Applicable over recommended operating range from -40°C +85°C, +1.8V +5.5V, Gate (unless otherwise noted).
2.7-, 2.5-, 1.8-volt Symbol fSCL tLOW tHIGH tBUF tHD.STA tSU.STA tHD.DAT tSU.DAT tSU.STO Endurance(1) Note: Parameter Clock Frequency, Clock Pulse Width Clock Pulse Width High Noise Suppression Time
5.0-volt Units Write Cycles
Clock Data Valid Time must free before transmission start(1) Start Hold Time Start Set-up Time Data Hold Time Data Set-up Time Inputs Rise Time(1) Inputs Fall Time(1) Stop Set-up Time Data Hold Time Write Cycle Time 5.0V, 25°C, Page Mode
This parameter characterized 100% tested.
Device Operation
CLOCK DATA TRANSITIONS: normally pulled high with external device. Data change only during time periods (refer Data Validity timing diagram). Data changes during high periods will indicate start stop condition defined below. START CONDITION: high-to-low transition with high start condition which must precede other command (refer Start Stop Definition timing diagram). STOP CONDITION: low-to-high transition with high stop condition. After read sequence, stop command will place EEPROM standby power mode (refer Start Stop Definition timing diagram). ACKNOWLEDGE: addresses data words serially transmitted from EEPROM words EEPROM sends zero acknowledge that received each word. This happens during ninth clock cycle. STANDBY MODE: AT24C02A/04A/08A features power standby mode which enabled: upon power-up after receipt STOP completion internal operations. MEMORY RESET: After interruption protocol, power loss system reset, 2-wire part reset following these steps:(a) Clock cycles, look high each cycle while high then create start condition high.
AT24C02A/04A/08A
AT24C02A/04A/08A
Timing (SCL: Serial Clock, SDA: Serial Data I/O)
Write Cycle Timing (SCL: Serial Clock, SDA: Serial Data I/O)
WORD
tWR(1) STOP CONDITION START CONDITION
Note:
write cycle time time from valid stop condition write sequence interval clear/write cycle.
Data Validity
Start Stop Definition
Output Acknowledge
AT24C02A/04A/08A
AT24C02A/04A/08A
Device Addressing
EEPROM devices require device address word following start condition enable chip read write operation (refer Figure device address word consists mandatory one, zero sequence first four most significant bits shown. This common EEPROM devices. next bits device address bits EEPROM. These bits must compare their corresponding hard-wired input pins. EEPROM only uses device address bits with third being memory page address bit. device address bits must compare their corresponding hard-wired input pins. connect. EEPROM only uses device address with next bits being memory page addressing. must compare corresponding hard-wired input pin. pins connect. eighth device address read/write operation select bit. read operation initiated this high write operation initiated this low. Upon compare device address, EEPROM will output zero. compare made, chip will return standby state. data word address lower three (2K) four (4K, bits internally incremented following receipt each data word. higher data word address bits incremented, retaining memory page location. When word address, internally generated, reaches page boundary, following byte placed beginning same page. more than eight (2K) sixteen (4K, data words transmitted EEPROM, data word address will "roll over" previous data will overwritten. ACKNOWLEDGE POLLING: Once internally-timed write cycle started EEPROM inputs disabled, acknowledge polling initiated. This involves sending start condition followed device address word. read/write representative operation desired. Only internal write cycle completed will EEPROM respond with zero allowing read write sequence continue.
Read Operations
Read operations initiated same write operations with exception that read/write select device address word one. There three read operations: current address read, random address read sequential read. CURRENT ADDRESS READ: internal data word address counter maintains last address accessed during last read write operation, incremented one. This address stays valid between operations long chip power maintained. address "roll over" during read from last byte last memory page first byte first page. address "roll over" during write from last byte current page first byte same page. Once device address with read/write select clocked acknowledged EEPROM, current address data word serially clocked out. microcontroller does respond with input zero does generate following stop condition (refer Figure RANDOM READ: random read requires "dummy" byte write sequence load data word address. Once device address word data word address clocked acknowledged EEPROM, microcontroller must generate another start condition. microcontroller initiates current address read sending device address with read/write select high. EEPROM acknowledges device address serially clocks data word. microcontroller does respond with zero does generate following stop condition (refer Figure SEQUENTIAL READ: Sequential reads initiated either current address read random address read. After microcontroller receives data word, responds
Write Operations
BYTE WRITE: write operation requires data word address following device address word acknowledgement. Upon receipt this address, EEPROM will again respond with zero then clock first data word. Following receipt data word, EEPROM will output zero addressing device, such microcontroller, must terminate write sequence with stop condition. this time EEPROM enters internally-timed write cycle, tWR, nonvolatile memory. inputs disabled during this write cycle EEPROM will respond until write complete (refer Figure PAGE WRITE: EEPROM capable 8-byte page write, devices capable 16byte page writes. page write initiated same byte write, microcontroller does send stop condition after first data word clocked Instead, after EEPROM acknowledges receipt first data word, microcontroller transmit seven (2K) fifteen (4K, more data words. EEPROM will respond with zero after each data word received. microcontroller must terminate page write sequence with stop condition (refer Figure
with acknowledge. long EEPROM receives acknowledge, will continue increment data word address serially clock sequential data words. When memory address limit reached, data word Figure Device Address
address will "roll over" sequential read will continue. sequential read operation terminated when microcontroller does respond with zero does generate following stop condition (refer Figure
Figure Byte Write
LINE
DEVICE ADDRESS
WORD ADDRESS
DATA
Figure Page Write
LINE WORD ADDRESS
DEVICE ADDRESS
DATA
DATA
DATA
AT24C02A/04A/08A
AT24C02A/04A/08A
Figure Current Address Read
LINE DATA
DEVICE ADDRESS
Figure Random Read
LINE DATA DEVICE ADDRESS
DEVICE ADDRESS
WORD ADDRESS
DUMMY WRITE
Figure Sequential Read
AT24C02A Ordering Information
(max) (ms) (max) (µA) 3000 (max) (µA) fMAX (kHz) Ordering Code AT24C02A-10PC AT24C02AN-10SC AT24C02A-10TC AT24C02A-10PI AT24C02AN-10SI AT24C02A-10TI AT24C02A-10PC-2.7 AT24C02AN-10SC-2.7 AT24C02A-10TC-2.7 AT24C02A-10PI-2.7 AT24C02AN-10SI-2.7 AT24C02A-10TI-2.7 AT24C02A-10PC-2.5 AT24C02AN-10SC-2.5 AT24C02A-10TC-2.5 AT24C02A-10PI-2.5 AT24C02AN-10SI-2.5 AT24C02A-10TI-2.5 AT24C02A-10PC-1.8 AT24C02AN-10SC-1.8 AT24C02A-10TC-1.8 AT24C02A-10PI-1.8 AT24C02AN-10SI-1.8 AT24C02A-10TI-1.8 Package Operation Range Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C)
3000
1500
1500
1000
1000
Package Type 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) 8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP) Options Blank -2.7 -2.5 -1.8 Standard Operation (4.5V 5.5V) Voltage (2.7V 5.5V) Voltage (2.5V 5.5V) Voltage (1.8V 5.5V)
AT24C02A/04A/08A
AT24C02A/04A/08A
AT24C04A Ordering Information
(max) (ms) (max) (µA) 3000 (max) (µA) fMAX (kHz) Ordering Code AT24C04A-10PC AT24C04AN-10SC AT24C04A-10TC AT24C04A-10PI AT24C04AN-10SI AT24C04A-10TI AT24C04A-10PC-2.7 AT24C04AN-10SC-2.7 AT24C04A-10TC AT24C04A-10PI-2.7 AT24C04AN-10SI-2.7 AT24C04A-10TI-2.7 AT24C04A-10PC-2.5 AT24C04AN-10SC-2.5 AT24C04A-10TC-2.5 AT24C04A-10PI-2.5 AT24C04AN-10SI-2.5 AT24C04A-10TI-2.5 AT24C04A-10PC-1.8 AT24C04AN-10SC-1.8 AT24C04A-10TC-1.8 AT24C04A-10PI-1.8 AT24C04AN-10SI-1.8 AT24C04A-10TI-1.8 Package Operation Range Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C)
3000
1500
1500
1000
1000
Package Type 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) 8-lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP) Options Blank -2.7 -2.5 -1.8 Standard Operation (4.5V 5.5V) Voltage (2.7V 5.5V) Voltage (2.5V 5.5V) Voltage (1.8V 5.5V)
AT24C08A Ordering Information
(max) (ms) (max) (µA) 3000 3000 1500 1500 1000 1000 (max) (µA) fMAX (kHz) Ordering Code AT24C08A-10PC AT24C08AN-10SC AT24C08A-10PI AT24C08AN-10SI AT24C08A-10PC-2.7 AT24C08AN-10SC-2.7 AT24C08A-10PI-2.7 AT24C08AN-10SI-2.7 AT24C08A-10PC-2.5 AT24C08AN-10SC-2.5 AT24C08A-10PI-2.5 AT24C08AN-10SI-2.5 AT24C08A-10PC-1.8 AT24C08AN-10SC-1.8 AT24C08A-10PI-1.8 AT24C08AN-10SI-1.8 Package Operation Range Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C)
Package Type 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options Blank -2.7 -2.5 -1.8 Standard Operation (4.5V 5.5V) Voltage (2.7V 5.5V) Voltage (2.5V 5.5V) Voltage (1.8V 5.5V)
AT24C02A/04A/08A
AT24C02A/04A/08A
Packaging Information
8P3, 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) Dimensions Inches (Millimeters)
JEDEC STANDARD MS-001
8S1, 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Dimensions Inches (Millimeters)
.013 (.330)
.400 (10.16) .355 (9.02) .280 (7.11) .240 (6.10) .037 (.940) .027 (.690)
.157 (3.99) .150 (3.81)
.244 (6.2 .228 (5.7
.300 (7.62)
.050 (1.27)
.210 (5.33) SEATING PLANE .150 (3.81) .115 (2.92) .070 (1.78) .045 (1.14)
.100 (2.54)
.196 (4.98) .189 (4.80)
.015 (.380) .022 (.559) .014 (.356)
.068 (1.73) .053 (1.35)
.325 (8.26) .300 (7.62) .012 (.305) .008 (.203) .430 (10.9)
.010 (.254) .004 (.102) .010 (.254) .007 (.203)
8-lead, 0.170" Wide, Plastic Thin Small Outline Package (TSSOP) Dimensions Millimeters (Inches)*
6.50 (.256) 6.25 (.246)
0.30 (.012) 0.19 (.008)
1.05 (.041) 0.80 (.033)
3.10 (.122) 2.90 (.114)
1.20 (.047)
(.026)
0.15 (.006) 0.05 (.002)
(.177) (.169) 0.20 (.008) 0.09 (.004) 0.75 (.030) 0.45 (.018)
*Controlling dimension: millimeters
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