STMicroelectronics M95080-DRDW8TP/K

Overview

M95080-DRDW8TP/K from STMicroelectronics is an 8-Kbit serial SPI EEPROM with 1024 × 8-bit organization, 32-byte page size, and extended operation up to 105 °C at V_CC = 1.7–5.5 V. It features embedded ECC logic for enhanced data integrity, a dedicated 32-byte lockable Identification Page, and block-level write protection (1/4, 1/2, or full memory). Used in automotive body control modules for storing calibration data and fault logs under high-temperature engine bay conditions.

For engineers reviewing the M95080-DRDW8TP/K datasheet, M95080-DRDW8TP/K pinout, M95080-DRDW8TP/K application, or M95080-DRDW8TP/K equivalent, key selection criteria include SPI clock speed scalability (5–20 MHz), write endurance at elevated temperature (900 k cycles @ 105 °C), identification page locking capability, and AEC-Q100 Grade 2 qualification for automotive use.

Technical Context

This SPI EEPROM implements CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes with data latched on rising C edge and output shifted on falling C edge. Its internal logic includes a status register with WIP (Write In Progress) and WEL (Write Enable Latch) flags, plus non-volatile BP1/BP0 bits controlling 1/4-, 1/2-, or full-memory write protection.

The device integrates Schmitt-trigger inputs for noise immunity, supports Hold mode to pause ongoing transfers without chip deselect, and uses true EEPROM technology enabling byte-alterable writes without block erasure. The Identification Page provides factory-programmed device ID bytes and user-writable/application-lockable fields.

Key Specifications

Pinout & Package

Package: TSSOP8 (DW), 169 mil width, RoHS-compliant and halogen-free ECOPACK2®.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25080B-SSHL-B and BR24G08FJ-3GE2, the M95080-DRDW8TP/K uniquely combines AEC-Q100 Grade 2, 105 °C endurance, and a lockable Identification Page-making it the only option for automotive systems requiring certified, tamper-resistant calibration storage.

Availability

M95080-DRDW8TP/K is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC configuration storage, medical infusion pump calibration, and smart energy meter firmware parameters requiring stable component supply across extended temperature and long-life deployments.

Supply support for M95080-DRDW8TP/K 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 designing and manufacturing microcontrollers, power management ICs, sensors, and memory solutions for automotive, industrial, and consumer markets.

The M95080-DRDW8TP/K belongs to ST's automotive-qualified serial EEPROM product line, engineered specifically for reliable nonvolatile data storage in harsh environments where temperature resilience, data integrity, and functional safety are critical.

FAQ

What is the function of the HOLD pin on the M95080-DRDW8TP/K?

The HOLD pin pauses ongoing SPI communication without deselecting the device or resetting the internal state machine. Activation requires HOLD low while Serial Clock (C) is low; during HOLD, Q goes high-Z and D/C signals are ignored. This enables multi-master arbitration or temporary suspension of EEPROM access during high-priority MCU tasks, with seamless resumption upon HOLD release.

How does the Identification Page differ from main memory in usage and protection?

The Identification Page is a dedicated 32-byte area containing factory-programmed ST device ID bytes (first 3 bytes) and 29 bytes for user data. Unlike main memory, it can be permanently locked in read-only mode using the LID instruction-preventing any future writes even if WEL is set. This makes it ideal for storing immutable calibration signatures or security keys that must survive field reprogramming of operational parameters.

Can the M95080-DRDW8TP/K operate reliably at 1.7 V and 105 °C simultaneously?

Yes-the device is fully specified for concurrent operation at V_CC = 1.7 V and T_A = 105 °C, with guaranteed 5 MHz SPI clock support, 900 k write cycles, and >50-year data retention. This dual extreme rating is validated per AEC-Q100 Grade 2 stress testing and reflected in DC/AC parametric limits across the full operating envelope in the official datasheet.

What happens to the Status Register when the W pin is held low and SRWD = 1?

When SRWD = 1 and W is driven low, the Status Register becomes permanently write-protected: WRSR commands are discarded, and BP1/BP0 bits cannot be modified-even by WREN + WRSR sequences. The only recovery path is to drive W high, which restores write capability to the Status Register. This hardware-enforced lock prevents accidental or malicious changes to memory protection settings in deployed systems.