onsemi N25S830HAT22IOS, 256kbit EEPROM Memory Chip 8-Pin TSSOP SPI

2.7 to 3.6 V power supply range
Very low standby current - typical Isb as low as 1 uA
Very low operating current - as low as 3 mA
Simple memory control: single chip select (CS), serial input (SI) and serial output (SO)
Flexible operating modes: word read and write, page mode (32 word page), and burst mode (full array)
32 K x 8 bit organization
Self timed write cycles
Built-in write protection (CS high)
HOLD pin for pausing communication