STMicroelectronics M95080-RDW6TP

Overview

M95080-RDW6TP from STMicroelectronics is an 8-Kbit serial SPI bus EEPROM organized as 1024 × 8 bits, designed for nonvolatile data storage in microcontroller-based systems requiring low-voltage operation, fast write cycles, and robust data integrity. It operates from 1.8 V to 5.5 V, supports up to 20 MHz clock frequency, delivers ≤5 ms byte/page write time, and features ECC x1 error correction and a dedicated 32-byte identification page with permanent lock capability.

For engineers reviewing the M95080-RDW6TP datasheet, M95080-RDW6TP pinout, M95080-RDW6TP application, or M95080-RDW6TP equivalent, this device is selected for embedded systems needing reliable, low-power, SPI-compatible memory with configurable write protection, extended data retention (>200 years), and enhanced ESD tolerance - especially where supply voltage headroom is constrained below 2.5 V.

Technical Context

The M95080-RDW6TP implements a synchronous serial interface compliant with SPI modes CPOL=0/CPHA=0 and CPOL=1/CPHA=1, latching input data on the rising edge of C and outputting data on its falling edge. Its internal architecture includes a status register with nonvolatile BP1/BP0 bits for software-configurable block protection (quarter/half/whole array), SRWD bit for hardware-locked status register writes, and an ECC x1 engine correcting single-bit errors per byte during read operations.

It integrates a power-on-reset (POR) circuit ensuring instruction immunity during power-up, supports Hold functionality to pause communication without chip deselection, and uses a built-in sequencer with HV generator for internal write cycling. The identification page (32 bytes) is accessible only via RDID/WRID instructions and can be permanently locked to read-only mode via LID instruction.

Key Specifications

Pinout & Package

Package: TSSOP8 (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 EEPROM applications.

Compared with AT25080B-SSHL-T and BR24G08NUX-10, the M95080-RDW6TP provides unique value through its combination of ECC x1, dedicated lockable identification page, and full 20 MHz timing - making it optimal for applications demanding both data integrity and secure parameter management under variable supply conditions.

Availability

M95080-RDW6TP is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, automotive body controllers, and portable medical diagnostics requiring stable component supply, long-lifecycle support, and guaranteed RoHS/ECOPACK2 compliance.

Supply support for M95080-RDW6TP 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, analog ICs, and nonvolatile memory, with strong focus on industrial, automotive, and embedded applications.

The M95080 series belongs to ST's serial EEPROM product line, engineered for robust, low-voltage SPI memory solutions in space-constrained, mission-critical systems where data integrity, endurance, and supply flexibility are essential.

FAQ

What is the function of the HOLD pin, and when should it be used?

The HOLD pin pauses ongoing SPI communication without deselecting the device or resetting internal state. It must be asserted only when Chip Select (S) is low, and causes Serial Data Output (Q) to go high-impedance while ignoring D and C inputs. Use it to temporarily suspend memory access during MCU interrupt servicing or bus arbitration, ensuring transaction resumption from the exact bit position.

How does the identification page differ from standard memory array pages?

The identification page is a dedicated 32-byte region accessible only via RDID/WRID instructions - not through standard READ/WRITE commands. It supports permanent read-only locking via the LID instruction, and its contents persist independently of block protection settings. This makes it ideal for storing immutable device identifiers, calibration constants, or cryptographic keys that must survive repeated firmware updates.

Can the M95080-RDW6TP operate reliably at 1.8 V while running at 20 MHz?

Yes - the M95080-RDW6TP is fully specified for 20 MHz operation across its entire 1.8 V to 5.5 V supply range. Electrical characteristics including setup/hold times, propagation delays, and output drive strength are validated at 1.8 V in the DS8776 Rev 5 datasheet (Section 9, AC Parameters), ensuring timing compliance without derating in low-voltage designs.

What happens if the Write Protect (W) pin is left floating during operation?

The W pin must be actively driven high or low; floating violates the absolute maximum ratings and may cause undefined behavior in Block Protect (BP1/BP0) bit interpretation and SRWD-enabled Hardware Protected mode activation. STMicroelectronics specifies that W must be stable during all write instructions - tie to VCC or GND via a pull-up/down resistor (e.g., 10 kΩ) to ensure deterministic protection state and prevent spurious lockouts.