M24256-A 256 Kbit Serial I C Bus EEPROM is a Microchip product that is compatible with I2C extended addressing and supports the 400 kHz protocol.
The document describes the M24256-A, an electrically erasable programmable memory (EEPROM) device organized as 32Kx8 bits. It is compatible with the I2C extended addressing standard and supports a two-wire serial interface operating at up to 400 kHz. The device features hardware write control via a dedicated pin to prevent inadvertent data corruption during power-up or voltage fluctuations.
The M24256-A is available in various packages including Plastic Dual-in-Line, Small Outline, Thin Shrink Small Outline, and chip-scale (SBGA). It supports single supply voltages ranging from 4.5V to 5.5V for the standard version, with lower voltage variants also mentioned. The datasheet provides absolute maximum ratings, signal descriptions, device operation protocols including start/stop conditions, and tables detailing addressing modes such as random address read and page write.
| Capacity | 256 Kbit (32Kx8 bits) |
|---|---|
| Maximum Clock Frequency | 400 kHz |
| Supply Voltage Range | 4.5V to 5.5V |
| Operating Temperature Range | -40 to 125 °C |
The M24256-A supports a protocol frequency of 400 kHz.
The device operates with a single supply voltage between 4.5V and 5.5V.
The device supports more than 100,000 erase/write cycles.