STMicroelectronics M95M02-DRCS6TP/K

Overview

M95M02-DRCS6TP/K from STMicroelectronics is a 2-Mbit serial SPI EEPROM organized as 262,144 × 8 bits, serving as nonvolatile program/data storage in microcontroller-based systems. It operates from 1.8 V to 5.5 V over –40 °C to +85 °C, supports 5 MHz clock frequency, features 256-byte page write (≤10 ms), and includes an additional lockable 256-byte identification page for secure parameter storage - used in industrial control firmware storage and IoT device calibration data retention.

For engineers reviewing the M95M02-DRCS6TP/K datasheet, M95M02-DRCS6TP/K pinout, M95M02-DRCS6TP/K application, or M95M02-DRCS6TP/K equivalent, key selection considerations include block-level write protection (¼/½/whole memory), HOLD signal support for SPI transaction pausing, identification page locking capability, and dual-package availability (SO8N/WLCSP8) with ECOPACK2 compliance.

Technical Context

The M95M02-DRCS6TP/K implements a standard SPI interface with CPOL=0/CPHA=0 or CPOL=1/CPHA=1 mode compatibility, using dedicated D (input), Q (output), C (clock), S (chip select), W (write protect), and HOLD (pause) signals. Its internal architecture includes a status register with WIP, WEL, BP1/BP0, and SRWD bits, enabling software- and hardware-controlled write protection.

It integrates ECC logic, page latches, and an HV generator for reliable byte/page writes. The identification page (256 bytes) is separately addressable and can be permanently locked via LID instruction when SRWD=1 and W=low - providing tamper-resistant storage for cryptographic keys or calibration coefficients without requiring external security ICs.

Key Specifications

Pinout & Package

Package: SO8N (150 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 AT25DF041A-SSH-T and MX25L2006EM1I-12G, the M95M02-DRCS6TP/K uniquely combines 2 Mbit density with HOLD support, lockable ID page, and flexible 1.8–5.5 V operation - making it optimal for resource-constrained, safety-aware, and mixed-voltage embedded systems requiring deterministic, secure, and robust nonvolatile storage.

Availability

M95M02-DRCS6TP/K is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, smart meter firmware patch storage, and automotive body control module settings requiring stable component supply across extended temperature and voltage ranges.

Supply support for M95M02-DRCS6TP/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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M95M02 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, and secure nonvolatile data storage in space- and cost-constrained embedded systems where reliability across wide temperature and voltage ranges is mandatory.

FAQ

What is the function of the HOLD pin on M95M02-DRCS6TP/K?

The HOLD pin pauses ongoing SPI communication without deselecting the device or resetting internal state. When asserted low (with S=low and C=low), it places Q in high-impedance and ignores D and C inputs - allowing the host MCU to service interrupts or perform other tasks while preserving the exact point in the current SPI transaction. This eliminates data loss risk during time-critical operations like motor commutation or CAN message handling.

How does the identification page differ from the main memory array?

The identification page is a dedicated 256-byte memory region accessible via RDID/WRID instructions, separate from the main 262,144-byte array. It supports the LID (Lock Identification Page) instruction, which - when SRWD=1 and W=low - permanently disables further writes to this page. Unlike main memory, its contents survive even after full-memory block protection is disabled, making it ideal for storing immutable device-specific credentials or calibration signatures.

Can M95M02-DRCS6TP/K operate reliably at 1.8 V across the full –40 °C to +85 °C range?

Yes. The M95M02-DRCS6TP/K is rated for 1.8–5.5 V operation over –40 °C to +85 °C ambient temperature, as confirmed in DS7024 Rev 13 Section 1. The device incorporates an internal power-on-reset (POR) circuit that ensures correct initialization even at 1.8 V, and its DC/AC parameters (including tW, tSHSL, and VIH/VIL thresholds) are fully characterized across this voltage and temperature envelope - enabling direct interface with ultra-low-power MCUs like STM32L4+.

What happens if chip select (S) is driven high mid-transaction?

Driving S high mid-transaction terminates the current instruction and places Q in high-impedance. If a WRITE or WRSR command was partially received, the device discards it and resets its internal state - except WEL and WIP bits, which retain their pre-deselection values. For WRITE commands, however, deasserting S after the final data byte triggers the internal write cycle. This behavior is leveraged in standard SPI protocols to initiate writes without requiring explicit "execute" commands.