M95256 and M95128 are interchangeable 256Kbit and 128Kbit serial SPI bus EEPROMs with high speed clock rate, up to 10MHz clock rate, 5ms write time. This datasheet provides M95256 and M95128 specifications, packages, pinouts and logic diagrams.
This document describes the M95256 (256Kbit) and M95128 (128Kbit) Serial EEPROM devices, which are accessed via a high-speed SPI-compatible bus. The memory arrays are organized as 32768 x 8 bits for the M95256 and 16384 x 8 bits for the M95128.
| Capacity (M95256) | 32768 x 8 bit |
|---|---|
| Capacity (M95128) | 16384 x 8 bit |
| Clock Rate | 10MHz |
| Write Time | 5ms |
| Erase/Write Cycles | More than 100000 |
| Data Retention | 40-Year |
The devices support CPOL=0, CPHA=0 and CPOL=1, CPHA=1 modes.
The standard M95xxx devices operate with a single supply voltage of 4.5 to 5.5V.
Yes, the device features an adjustable size read-only EEPROM area.