Atmel AT24CS04 and AT24CS08
I2C-Compatible (2-wire) Serial EEPROM with a
Unique, Factory Programmed 128-bit Serial Number
4-Kbit (512 x 8), 8-Kbit (1024 x 8)
PRELIMINARY DATASHEET
Standard Features
Low-voltage operation
VCC = 1.7V to 5.5V
Internally organized as 512 x 8 (4-Kbit) or 1024 x 8 (8-Kbit)
I2C-compatible (2-wire) serial interface
Schmitt Trigger, filtered inputs for noise suppression
Bidirectional data transfer protocol
400kHz (1.7V) and 1MHz (2.5V, 2.7, 5.0V) compatibility
Write Protect pin for hardware data protection
16-byte page write mode
Partial page writes allowed
Self-timed write cycle (5ms max)
High-reliability
www.DataSheet.net/
Endurance: 1,000,000 write cycles
Data retention: 100 years
Green package options (Pb/Halide-free/RoHS-compliant)
8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, and 5-lead SOT23
Die sale options: wafer form and tape and reel available
Enhanced Features in the CS Serial EEPROM Series
All standard features supported
128-bit unique factory-programmed serial number
Permanently locked, read-only value
Stored in a separate memory area
Guaranteed unique across entire CS Series of Serial EEPROMs
8766A–SEEPR–6/12
Datasheet pdf - http://www.DataSheet4U.co.kr/