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Datasheet
M95256-WMN6TP – 256Kbit SPI EEPROM Memory IC | 20MHz SOIC-8 Package
The M95256-WMN6TP from STMicroelectronics is a high-speed 256Kbit (32 Kbyte) serial EEPROM memory IC that provides reliable, non-volatile data storage using the SPI (Serial Peripheral Interface) bus. Organized as 32,768×8 bits, this device supports high-speed SPI communication up to 20MHz, enabling fast and efficient data transfer for embedded and industrial applications. Operating with a single supply voltage from 2.5V to 5.5V, the M95256-W variant ensures stable performance across a wide range of systems. It offers byte and page write operations (64-byte page size), hardware and software write protection, and supports partial (, ) or full memory array protection. With over 4 million write cycles and 200 years of data retention, the M95256-WMN6TP guarantees exceptional endurance and long-term reliability.
Key Features

SPI Interface: Fully compatible with the Serial Peripheral Interface (SPI) standard for easy microcontroller integration.

Memory Organization: 256Kbit (32 Kbyte) arranged as 32,768×8 bits.

High-Speed Operation: Supports SPI clock frequencies up to 20MHz for fast read and write cycles.

Write Operations:

Byte and page (64-byte) writes within 5 ms.

Self-timed write cycle management.

Supply Voltage Range:

M95256-W: 2.5V to 5.5V

M95256-R: 1.8V to 5.5V

M95256-DF: 1.7V to 5.5V

Write Protection: Software and hardware protection options allow partial (, ) or full memory array lock.

Identification Page: Optional 64-byte identification page for storing sensitive or configuration data (lockable in read-only mode).

High Reliability:

More than 4 million write cycles per byte.

Over 200 years of data retention.

Robust Design: Enhanced ESD protection and wide temperature range (-40 C to+85 C).

Packaging Options: Available in SO8N (ECOPACK2), TSSOP8, UFDFPN8, and WLCSP8 packages.