Microchip AT24C04D-SSHM-B, 4kB EEPROM Chip, 450ns 8-Pin SOIC I2C

The Microchip I2C compatible 4,096 bits of serial electrically erasable and programmable read only memory EEPROM organized as 512 words of 8 bits each. The device’s cascadable feature allows up to four devices to share a common 2-wire bus. This device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential.

Random and sequential read modes
Self-timed write cycle within 5 ms maximum
High reliability
Endurance 1,000,000 write cycles
Data retention 100 years