STMicroelectronics M95160-WMN6TP

Overview

M95160-WMN6TP from STMicroelectronics is a 16-Kbit serial SPI bus EEPROM organized as 2048 × 8 bits, operating from 2.5 V to 5.5 V over −40 °C to +85 °C. It supports 20 MHz clock speed, 32-byte page writes completing in ≤5 ms, and offers quarter/half/whole array write protection via hardware (W pin) and status register (BP1/BP0 bits). It is used for configuration storage in industrial controllers requiring nonvolatile parameter retention across power cycles.

For engineers reviewing the M95160-WMN6TP datasheet, M95160-WMN6TP pinout, M95160-WMN6TP application, or M95160-WMN6TP equivalent, key selection criteria include supply voltage range compatibility (2.5–5.5 V), SO8N package footprint, SPI mode support (CPOL=0/CPHA=0 and CPOL=1/CPHA=1), and write endurance (>4 million cycles).

Technical Context

The device implements a standard SPI interface with four active control signals (S, C, D, Q), plus HOLD and W for real-time communication suspension and hardware-based memory protection. Its internal architecture includes an address register, data register, page decoder, and status register with BP0/BP1 bits controlling protected block size (64 B, 128 B, 512 B, or full 2 KB array).

Write operations are managed through explicit instruction sequences: WREN enables writes, WRITE performs byte/page programming, and WRSR configures protection bits. The status register's WIP bit indicates ongoing write activity, while WEL reflects write-enable latch state - both critical for robust firmware polling and error recovery.

Key Specifications

Pinout & Package

Package: SO8N (ECOPACK2®), 150 mil body width, 8-lead plastic small outline. Pin-1 marked by notch or dot; pin numbering follows standard counter-clockwise convention from top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25160B-SSHL-T and BR24G16FJ-3GE2, M95160-WMN6TP uniquely combines SO8N mechanical compatibility, hardware HOLD support, ECOPACK2® environmental compliance, and a factory-lockable identification page - making it optimal for industrial control and automotive modules requiring long-term design-in stability and secure parameter management.

Availability

M95160-WMN6TP is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, automotive body control modules, and medical calibration systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for M95160-WMN6TP 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 specializing in microcontrollers, power management, sensors, and nonvolatile memory solutions for industrial, automotive, and consumer markets.

M95160-WMN6TP belongs to ST's serial EEPROM product line, designed specifically for robust, low-power, SPI-based configuration storage in mission-critical embedded systems demanding high endurance and extended data retention.

FAQ

What is the maximum SPI clock frequency supported by M95160-WMN6TP?

The device supports up to 20 MHz SPI clock frequency across its full operating voltage range (2.5 V to 5.5 V) and temperature range (−40 °C to +85 °C), as verified in AC characteristics Table 17 of the official datasheet. This enables sub-5 ms page writes and fast read access without timing margin violations.

Does M95160-WMN6TP require external pull-up resistors on SPI lines?

Yes - a 100 kΩ pull-up resistor on the Chip Select (S) line is recommended to prevent unintended device selection if the SPI master enters high-impedance state. An external pull-down on the Serial Clock (C) line is also advised in reset-prone systems to avoid violating tSHCH timing when S and C float simultaneously.

How is write protection implemented on M95160-WMN6TP?

Write protection uses dual mechanisms: hardware-based via the W pin (low = freeze BP-defined protected region), and software-configurable via BP0/BP1 bits in the status register. Protection granularity ranges from 64 bytes to full 2 KB array, and the W pin overrides software settings when asserted.

Can the Identification Page be rewritten after initial programming?

Yes - the 32-byte Identification Page can be written multiple times until permanently locked using the Lock ID instruction. Once locked, it becomes read-only and cannot be erased or rewritten, ensuring immutability of embedded device identifiers or cryptographic keys.