STMicroelectronics M24C02-WMN6TP

Overview

M24C02-WMN6TP from STMicroelectronics is a 2-Kbit (256-byte) I²C-compatible serial EEPROM organized as 256 × 8 bits, operating at up to 400 kHz Fast-mode I²C bus speed, with 16-byte page write capability and hardware write protection via WC pin. It supports industrial temperature range (−40 °C to +85 °C), wide supply voltage (2.5 V to 5.5 V), and delivers >4 million write cycles with >200-year data retention - deployed in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.

For engineers reviewing the M24C02-WMN6TP datasheet, M24C02-WMN6TP pinout, M24C02-WMN6TP application, or M24C02-WMN6TP equivalent, key selection considerations include I²C address flexibility (E0–E2 pins), WC-controlled full-array write lock, SO8N ECOPACK2 package compatibility, and guaranteed operation across 2.5–5.5 V supply with fast 5 ms byte/page write timing.

Technical Context

The M24C02-WMN6TP implements a slave-only I²C interface compliant with Standard (100 kHz) and Fast (400 kHz) modes, using open-drain SDA with external pull-up and edge-triggered SCL synchronization. Its internal architecture includes a page latch, X/Y decoders, HV generator for EEPROM programming, and automatic address incrementing on read/write.

Device addressing uses a fixed 7-bit code (1010xxx) where E2/E1/E0 pins set the three LSBs; in the SO8N package (MN variant), all three are bonded and accessible. Write control (WC) disables all write operations when high, while power-on reset (POR) prevents spurious writes during VCC ramp-up or drop-out.

Key Specifications

Pinout & Package

Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free - suitable for automated surface-mount assembly and IPC Class 2/3 reliability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and CAT24C02WI-GT3, the M24C02-WMN6TP uniquely combines industrial temperature range, hardware write protection, and ST's ECOPACK2 environmental compliance - making it optimal for safety-critical or long-lifecycle deployments where data integrity and regulatory conformance are mandatory.

Availability

M24C02-WMN6TP is available at Aetrix Electronics and suitable for industrial PLC configuration storage, smart sensor calibration data logging, and power supply sequencing parameter backup requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for M24C02-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, designing and manufacturing analog, MCU, power, and memory products for industrial, automotive, and consumer markets.

The M24Cxx-W series targets cost-sensitive, space-constrained embedded systems needing reliable, low-power serial EEPROM with industrial-grade voltage and temperature margins - optimized for integration into compact PCB layouts with minimal external components.

FAQ

What is the function of the WC pin on M24C02-WMN6TP?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire EEPROM array when driven high. When WC is low or floating, writes are enabled. This provides physical-level protection against accidental or malicious overwrites - independent of software state or I²C command flow - and is especially valuable in field-upgrade scenarios or safety-critical systems.

Can M24C02-WMN6TP operate at 1.8 V supply?

No. The M24C02-WMN6TP variant is specified for 2.5 V to 5.5 V operation only. For 1.8 V compatibility, ST offers the M24C02-R series (e.g., M24C02-RMN6TP), which supports 1.8 V to 5.5 V but does not extend down to 1.6 V like the -F variant. Using the -W part below 2.5 V risks unreliable read/write behavior and violates absolute maximum ratings.

How many unique I²C addresses can be assigned to M24C02-WMN6TP on a shared bus?

Up to eight unique addresses (1010000x through 1010111x) are possible using the E2, E1, and E0 pins, each configurable as high or low. In the SO8N package (MN), all three pins are accessible and bonded. Address selection is static at power-up and requires no software configuration - enabling deterministic multi-device topology without address collision risk.

Does M24C02-WMN6TP support sequential read across page boundaries?

Yes. During sequential read, the internal address counter automatically increments after each byte and rolls over from address FFh back to 00h. This allows uninterrupted streaming of up to 256 bytes in a single I²C transaction - ideal for firmware signature verification or bulk parameter dumps - provided the master continues clocking and acknowledges each byte until the final one.