STMicroelectronics M95P16-IXCST/EF

Overview

M95P16-IXCST/EF from STMicroelectronics is a 16 Mbit serial SPI page EEPROM with dual/quad output capability, organized as 4096 × 512-byte pages and two dedicated 512-byte identification pages. It operates from 1.6 V to 3.6 V across –40 °C to +85 °C, supports up to 80 MHz quad-SPI read, delivers 2.0 ms typical page write (including auto-erase), and features ECC for DEC/TED error correction - deployed in industrial control firmware storage and automotive body electronics parameter retention.

For engineers reviewing the M95P16-IXCST/EF datasheet, M95P16-IXCST/EF pinout, M95P16-IXCST/EF application, or M95P16-IXCST/EF equivalent, this page provides verified pin functions, real-world timing performance (e.g., 1.1 ms page erase, 100-year data retention), SPI mode compatibility (CPOL/CPHA = 0/0 or 1/1), and confirmed alternatives with documented functional trade-offs.

Technical Context

The M95P16-IXCST/EF implements a page-erasable EEPROM architecture with integrated Program/Erase Controller (PEC) managing self-timed erase-and-program cycles. Its memory array is partitioned into 32 blocks (64 KB each), 512 sectors (4 KB each), and 4096 pages (512 bytes each), with two additional identification pages - one configurable for UID and one lockable for secure parameter storage.

It supports three SPI operational modes: standard single-output, dual-output (DQ0/DQ1), and quad-output (DQ0–DQ3), with HOLD and W pins repurposed as data outputs during quad reads. Internal ECC provides double-bit correction over 16-byte chunks and triple-bit detection, with status flags accessible via the Safety register.

Key Specifications

Pinout & Package

Package: UFDFPN8 (2 mm × 3 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF161-SSHN-B and M95M02-DRMN6TP/K, the M95P16-IXCST/EF uniquely combines 16 Mbit density, 2.0 ms page write, quad-SPI throughput, and ECC - making it optimal for safety-critical, high-cycle, and high-speed embedded storage where byte-level alterability and data integrity are mandatory.

Availability

M95P16-IXCST/EF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/ECOPACK2 compliance.

Supply support for M95P16-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, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M95P16 belongs to ST's high-reliability serial EEPROM product line, engineered specifically for mission-critical embedded systems demanding ultra-long data retention, high endurance, and hardware-assisted functional safety features like ECC and ISO 26262-ready status flags.

FAQ

Does M95P16-IXCST/EF support standard SPI mode 0 (CPOL=0, CPHA=0)?

Yes, the device fully supports SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1), with input data latched on the rising edge of SCK and output data driven on the falling edge. This dual-mode compatibility ensures seamless integration with STM32, NXP Kinetis, and Renesas RA-series MCUs without custom driver modifications.

What is the purpose of the two identification pages?

The first 512-byte identification page contains factory-programmed device data and optionally stores a unique identifier (UID) upon request. The second page is user-writable and can be permanently locked in read-only mode to store sensitive parameters like calibration keys or security tokens - preventing accidental overwrite while enabling secure boot verification.

How does Deep power-down mode affect command execution?

In Deep power-down mode (entered via B9h command), the device ignores all instructions except Release from power-down (ABh). Current drops to 0.6 μA typ, and internal clocks are halted - ensuring zero risk of spurious writes or erases during battery-backed sleep. Recovery requires ABh followed by a valid instruction sequence; no POR reset is needed.

Can the HOLD pin be used during quad-SPI read operations?

No - during fast read quad output commands, the HOLD pin becomes DQ3 after the third address byte and loses its hold function. The hold feature remains available only in standard and dual-output read modes. For quad-read latency control, use the Page Program with Buffer Load command to decouple host SPI timing from internal programming latency.