STMicroelectronics M24C08-WMN6TP

Overview

M24C08-WMN6TP from STMicroelectronics is an 8-Kbit I²C-compatible serial EEPROM organized as 1 K × 8 bits, operating from 2.5 V to 5.5 V supply and supporting 100 kHz / 400 kHz I²C bus modes. It features 16-byte page write capability, 5 ms max write time, and full memory write protection via WC pin - deployed in industrial control modules for parameter storage and calibration data retention.

For engineers reviewing the M24C08-WMN6TP datasheet, M24C08-WMN6TP pinout, M24C08-WMN6TP application, or M24C08-WMN6TP equivalent, this device serves as a drop-in replacement for legacy I²C EEPROMs in space-constrained embedded systems requiring guaranteed 200-year data retention and >4 million write cycles under −40 °C to +85 °C operation.

Technical Context

The M24C08-WMN6TP implements a standard I²C slave protocol with start/stop detection, ACK/NACK handshaking, and internal address counter auto-increment. Its block diagram integrates HV generator + sequencer, page latches, X/Y decoders, and sense amplifiers to support byte and page write operations without external high-voltage programming.

It uses open-drain SDA with external pull-up, supports random/sequential read modes, and includes on-chip power-on-reset (POR) to prevent spurious writes during power ramp. The WC pin enables hardware-level write protection of the entire 8-Kbit array, while E2 allows dual-device addressing on shared I²C buses - both pins are NC in TSSOP8 and SO8N packages per DS9362 Rev 7.

Key Specifications

Pinout & Package

Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C EEPROM applications.

Compared with AT24C08D-SSHM-T and BR24G08NUX-5TR, the M24C08-WMN6TP provides deterministic hardware write protection via WC pin and proven 200-year data retention at 55 °C - critical for safety-critical or regulatory-audited systems where software-only locks are insufficient.

Availability

M24C08-WMN6TP is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and smart energy metering systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for M24C08-WMN6TP 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 products for industrial, automotive, and consumer markets.

The M24C series targets cost-sensitive, space-constrained embedded systems needing reliable, low-power I²C EEPROM with robust data integrity - optimized for factory automation, metering, and automotive sub-systems.

FAQ

Is the M24C08-WMN6TP pin-compatible with other M24C08 variants like M24C08-R or M24C08-F?

Yes - all M24C08 variants share identical SO8N pinout and I²C protocol behavior. However, the M24C08-WMN6TP operates from 2.5 V to 5.5 V, while M24C08-R supports 1.8 V minimum and M24C08-F supports 1.7 V minimum. Voltage range differences affect system-level compatibility but not physical or logical pin mapping.

What is the function of the NC pins (pins 5 and 6) in the SO8N package?

Pins 5 and 6 are not internally connected in the SO8N package and serve no electrical function. They must remain unconnected on PCBs - no routing, grounding, or capacitive loading is permitted. This is confirmed in DS9362 Rev 7 Figure 2 and Section 9 Package Information.

Can the WC pin be left floating, and what is its default state?

Yes - the WC pin is active-high and defaults to write-enabled when floating (logic low via internal weak pull-down). Driving it high disables all writes; leaving it unconnected or tied low permits normal operation. This behavior is explicitly defined in Section 2.4 of DS9362 Rev 7.

Does the M24C08-WMN6TP support sequential read across page boundaries?

Yes - sequential read automatically increments the internal address counter and rolls over from address 3FFh to 00h after the last byte. This behavior is guaranteed for SO8N-packaged devices per Section 5.2.3 of DS9362 Rev 7, unlike DFN5/WLCSP variants where rollover is undefined.