STMicroelectronics M95P08-IXCST/EF

Overview

M95P08-IXCST/EF from STMicroelectronics is an 8-Mbit serial SPI page EEPROM with dual/quad output capability, organized as 2048 × 512-byte pages and two dedicated 512-byte identification pages. It operates from 1.6–3.6 V over –40 °C to +85 °C, supports up to 80 MHz clock frequency, delivers 320 Mbits/s quad-read throughput, and features ECC-based DEC/TED error correction for high-reliability data storage in automotive body control modules.

For engineers reviewing the M95P08-IXCST/EF datasheet, M95P08-IXCST/EF pinout, M95P08-IXCST/EF application, or M95P08-IXCST/EF equivalent, this device is selected for its ultra-low power consumption (0.6 μA deep power-down), fast page write (2 ms typ), block-level write protection, and ISO26262-compatible operating status flags - critical for functional safety–aware embedded firmware storage.

Technical Context

The M95P08-IXCST/EF implements a SPI-compatible interface with support for CPOL/CPHA = (0,0) and (1,1) modes, enabling seamless integration with MCU peripherals. Its PEC (Program/Erase Controller) manages self-timed auto-erase-and-program operations, ensuring consistent 2 ms page write times across temperature and lifetime.

It integrates dual and quad output read modes where D-DQ0, Q-DQ1, W-DQ2, and HOLD-DQ3 become bidirectional I/Os during fast read commands, enabling 4-bit-per-cycle data transfer. The device includes volatile and non-volatile configuration registers, a safety register with ECC status bits, and programmable output drive strength for signal integrity tuning.

Key Specifications

Pinout & Package

Package: UFDFPN8 (2 × 3 mm), RoHS-compliant ECOPACK2, halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25SF041-MAHD-Y and M95M04-DRMN6TP/K, the M95P08-IXCST/EF uniquely combines 8 Mbit density, 320 Mbits/s quad-read, ECC, and ISO26262 flags - making it the only choice for ASIL-B–compliant automotive and industrial firmware storage requiring both speed and safety assurance.

Availability

M95P08-IXCST/EF is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC configuration storage, medical infusion pump calibration, and smart energy meter firmware logs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for M95P08-IXCST/EF 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, specializing in microcontrollers, power management, sensors, and nonvolatile memory for automotive, industrial, and consumer markets.

The M95P08 series belongs to ST's high-reliability serial EEPROM product line, engineered specifically for functional safety–critical firmware and calibration storage in automotive ECUs and industrial controllers where data integrity, endurance, and low-power operation are mandatory.

FAQ

Does M95P08-IXCST/EF support Quad SPI mode with address wraparound or continuous read?

Yes, the device supports Fast Read Quad Output (06h) command with 3-byte addressing and one dummy byte, enabling continuous 4-bit-per-cycle reads across page boundaries. Address wraparound is not supported - the read operation stops at the end of the memory array or when Chip Select is deasserted. Internal address counter increments automatically without host intervention.

How is the Unique ID provisioned, and can it be read without special commands?

The UID is factory-programmed into the first identification page upon customer request and is readable using standard Read Data (03h) command at fixed offset 0x0000 of ID Page 0. No special unlock sequence or security key is required; however, the UID is only accessible if the ID page is not write-locked. Locking is performed via Write Status Register command with appropriate BP bits.

What happens to the HOLD function during quad-output read, and is it recoverable?

During Fast Read Quad Output, the HOLD pin (Pin 7) becomes DQ3 output after the third address byte and loses HOLD functionality for the remainder of that command. The HOLD feature remains fully operational for all other commands including standard read, write, and status register access. Recovery requires completing the current command and issuing a new instruction sequence.

Can the two identification pages be used for general-purpose storage, and what protections apply?

ID Page 0 is read-only after UID provisioning and contains factory data; ID Page 1 is user-writable and can be permanently locked in read-only mode via Write Status Register command. Once locked, no further writes or erases are possible - even with WEL set - providing hardware-enforced immutability for sensitive parameters like cryptographic keys or calibration offsets.