The Microchip Serial EEPROM has SOIJ package typical with tube packing media. It has 512 K bits density and operating voltage range from 1.7 to 5.5 V. The maximum clock frequency is 1 MHz and has 128 bytes page size.

Schmitt triggers, filtered inputs for noise suppression
Bidirectional data transfer protocol
Write-protect pin for full array hardware data protection
Ultra low active current 3 mA maximum and standby current 6 μA maximum
Partial page writes allowed
Random and sequential read modes
Self-timed write cycle within 5 ms maximum
ESD protection > 4,000 V
High reliability
Endurance 1,000,000 write cycles
Data retention 100 years