This document describes the M95256 and M95128, which are 256Kbit and 128Kbit serial SPI bus EEPROMs. These products feature high-speed clock, single supply voltage, status register, hardware protection, byte and page write, self-timed programming cycle, and more.
This document describes the M95256 and M95128, which are electrically erasable programmable memory (EEPROM) devices accessed by a high-speed SPI-compatible bus. The memory arrays are organized as 32768 x 8 bit for the M95256 and 16384 x 8 bit for the M95128. The devices support single supply voltages ranging from 1.8V to 5.5V depending on the specific variant (M95xxx, M95xxx-W, or M95xxx-R) and feature a high-speed clock rate of 10MHz with a 5ms write time.
| Memory Capacity (M95256) | 32768 x 8 bit |
|---|---|
| Memory Capacity (M95128) | 16384 x 8 bit |
| Clock Rate | 10MHz |
| Write Time | 5ms |
| Supply Voltage (Standard) | 4.5 to 5.5V |
| Supply Voltage (-W variant) | 2.5 to 5.5V |
| Supply Voltage (-R variant) | 1.8 to 5.5V |
| Erase/Write Cycles | More than 100000 |
| Data Retention | More than 40-Year |
The devices support CPOL=0, CPHA=0 and CPOL=1, CPHA=1 modes.
Yes, the device features an adjustable size read-only EEPROM area.
The maximum clock rate is 10MHz.