Features
• Write Protect Pin for Hardware Data Protection
– Utilizes Different Array Protection Compared to the AT24C02/04/08
• Low-voltage and Standard-voltage Operation
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– 5.0 (VCC = 4.5V to 5.5V)
– 2.7 (VCC = 2.7V to 5.5V)
– 2.5 (VCC = 2.5V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
Internally Organized 256 x 8 (2K), 512 x 8 (4K) or 1024 x 8 (8K)
2-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Supperssion
Bidirectional Data Transfer Protocol
100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Clock Rate
8-byte Page (2K), 16-byte Page (4K, 8K) Write Modes
Partial Page Writes are Allowed
Self-timed Write Cycle (10 ms max)
High Reliability
– Endurance: One Million Write Cycles
– Data Retention: 100 Years
– ESD Protection: >3000V
Automotive Grade and Extended Temperature Devices Available
8-lead JEDEC SOIC, 8-pin PDIP, and 8-lead TSSOP Packages
2-wire Serial
EEPROM
2K (256 x 8)
4K (512 x 8)
8K (1024 x 8)
Description
The AT24C02A/04A/08A provides 2048/4096/8192 bits of serial electrically erasable
and programmable read only memory (EEPROM) organized as 256/512/1024 words
of 8 bits each. The device is optimized for use in many industrial and commercial
applications where low power and low voltage operation are essential. The
AT24C02A/04A/08A is available in space saving 8-pin PDIP, 8-lead JEDEC SOIC,
and 8-lead TSSOP (AT24C02A/04A) packages and is accessed via a 2-wire serial
interface. In addition, the entire family is available in 5.0V (4.5V to 5.5V), 2.7V (2.7V
to 5.5V), 2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) versions.
AT24C02A
AT24C04A
AT24C08A
Pin Configurations
Pin Name
Function
A0 - A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
NC
No Connect
8-pin PDIP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
AT24C02A/04A/
08A
8-lead SOIC
A0
A1
A2
GND
1
2
3
4
VCC
WP
SCL
SDA
8
7
6
5
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Rev. 0976C–04/01
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