STMicroelectronics M95512-RMN6P

Overview

M95512-RMN6P from STMicroelectronics is a 512-Kbit (64-Kbyte) serial SPI EEPROM with 128-byte page size, 1.8 V to 5.5 V single-supply operation, and enhanced ESD protection. It features an additional lockable Identification page, supports 16 MHz clock speed, and delivers >4 million write cycles with >200-year data retention - deployed in industrial sensor calibration storage and embedded firmware parameter retention.

For engineers reviewing the M95512-RMN6P datasheet, M95512-RMN6P pinout, M95512-RMN6P application, or M95512-RMN6P equivalent, this device is selected for low-voltage SPI EEPROM requirements in space-constrained designs where extended write endurance, hardware/software write protection, and identification-page security are critical.

Technical Context

The M95512-RMN6P implements a standard SPI interface with CPOL/CPHA = (0,0) or (1,1), latching input on rising C and output on falling C. Its internal architecture includes a status register with non-volatile BP1/BP0 bits for quarter/half/whole-array software write protection and SRWD bit enabling hardware-locked mode when W is low.

It integrates a high-voltage generator and ECC logic for reliable byte/page writes within 5 ms, supports HOLD for transaction pausing without chip deselection, and uses a dedicated Identification page (128 bytes) that can be permanently locked to read-only via LID instruction - unique to the -DF/-R variants.

Key Specifications

Pinout & Package

Package: TSSOP8 (169 mil width), ECOPACK2-compliant, 8-pin surface-mount with standard SO8N-compatible footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF512C-SSH-T, M95512-RMN6P offers true EEPROM semantics (no erase-before-write), 40× higher endurance, and hardware-secured ID page; versus M95512-DFMN6TP, it trades smaller footprint for easier TSSOP handling and thermal dissipation in industrial PCBs.

Availability

M95512-RMN6P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term obsolescence support, and ECOPACK2 environmental compliance.

Supply support for M95512-RMN6P 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, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

M95512-RMN6P belongs to ST's serial EEPROM product line, engineered specifically for robust, low-voltage, high-endurance non-volatile storage in resource-constrained embedded systems with stringent data integrity requirements.

FAQ

Is M95512-RMN6P compatible with standard SPI peripherals?

Yes - it supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), with input latched on rising clock edge and output valid on falling edge. No special MCU driver modifications are needed beyond standard SPI initialization and 8-bit MSB-first framing.

What is the function of the HOLD pin, and how does it differ from chip select (S)?

HOLD pauses ongoing SPI communication while keeping the device selected (S remains low), preserving internal state and clock phase alignment; unlike S, which fully deselects the device and resets transaction context, HOLD allows resumption without re-sending instruction bytes - critical for multi-master or real-time interrupt scenarios.

Can the Identification page be erased after being locked?

No - once the LID (Lock Identification) instruction is executed, the 128-byte Identification page becomes permanently read-only; the lock is irreversible and enforced by internal fuse-like logic. This ensures cryptographic keys or calibration data cannot be overwritten, even with full VCC and W pin control.

How does write protection work when both W pin and BP bits are active?

W pin controls hardware-level protection of the Status register (BP1/BP0/SRWD bits) when SRWD=1; BP bits define software-configurable memory array protection zones. Both layers operate independently: W prevents BP bit changes, while BP bits restrict WRITE access to defined address ranges - enabling defense-in-depth against accidental or malicious writes.