STMicroelectronics M95010-WMN6P

Overview

M95010-WMN6P from STMicroelectronics is a 1-Kbit (128-byte) serial SPI bus EEPROM organized as 128 × 8 bits, operating from 2.5 V to 5.5 V supply, supporting up to 20 MHz clock frequency, with 4 million write cycles and 200-year data retention. It serves as non-volatile parameter storage in microcontroller-based industrial control modules requiring robust, low-power memory with hardware and software write protection.

For engineers reviewing the M95010-WMN6P datasheet, M95010-WMN6P pinout, M95010-WMN6P application, or M95010-WMN6P equivalent, key selection criteria include its SO8N (ECOPACK2) package, quarter/half/whole-array write-protect capability via BP1/BP0 bits, ECC x1 single-bit error correction per byte, and compatibility with SPI modes CPOL=0/CPHA=0 and CPOL=1/CPHA=1.

Technical Context

The M95010-WMN6P implements a synchronous serial interface compliant with standard SPI protocols, using dedicated input/output pins (C, D, Q, S, W, HOLD) and internal state machines for instruction decoding, address latching, and page-write sequencing. Its architecture includes an on-chip high-voltage generator, status register with WIP/WEL/BP1/BP0 bits, and ECC x1 logic applied transparently during every read operation.

It supports Byte Write and Page Write (16-byte pages) both completing within 5 ms, features power-on-reset (POR) with VRES threshold monitoring, and enforces strict protocol timing - including chip select edge sensitivity, hold condition synchronization to C clock low, and mandatory WREN before any non-volatile write - to prevent inadvertent writes during power transitions or bus contention.

Key Specifications

Pinout & Package

Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial SPI EEPROM applications.

Compared with AT25010B-SSHL-T and BR24G01FJ-3GE2, the M95010-WMN6P delivers superior data integrity (ECC x1), higher endurance (4M vs. 1M cycles), and finer-grained protection (quarter-array lock), making it preferred for industrial and medical applications demanding long-term reliability and fault resilience.

Availability

M95010-WMN6P is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical infusion pumps, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for M95010-WMN6P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M950x0 series belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, SPI-compatible non-volatile storage in space-constrained embedded systems with stringent data integrity and longevity requirements.

FAQ

Does M95010-WMN6P support SPI mode CPOL=0, CPHA=1?

No. The M95010-WMN6P supports only CPOL=0, CPHA=0 and CPOL=1, CPHA=1 modes. In both, data is latched on the rising edge of C and output on the falling edge. CPOL=0, CPHA=1 would sample on the falling edge - which is incompatible with its timing architecture and is not listed in DS1639 Rev 14 Section 4.1.

Can the identification page be used on M95010-WMN6P?

No. The identification page (16 bytes, lockable via LID instruction) is exclusive to the M95040-DF variant. The M95010-WMN6P has no identification page functionality - its instruction set (Table 3) omits RDID, WRID, RDLS, and LID commands, and its memory map covers only 00h–7Fh.

What happens if W pin is left floating during operation?

The W (Write Protect) pin must never be left floating. If unconnected, it may float to an indeterminate voltage, potentially enabling unintended writes or causing erratic protection behavior. STMicroelectronics specifies that W must be actively driven high (to enable writes) or low (to disable all writes), typically via pull-up or pull-down resistor per application needs.

Is the SO8N package of M95010-WMN6P compatible with standard SOIC-8 footprints?

Yes. The SO8N (150 mil width) package matches JEDEC MS-012AC dimensions and is pin-compatible with standard SOIC-8 footprints. Its ECOPACK2 construction uses lead-free terminations and halogen-free molding compound, meeting RoHS and REACH compliance without requiring PCB layout changes from legacy SOIC-8 designs.