STMicroelectronics

M24C02-WMN6TP

A: The M24C02-WMN6TP is designed for a wide operating voltage range and low power consumption. The table below summarises its core specifications: Specification Value Memory Capacity 2 Kbit (256 bytes) Memory Organization 256 × 8 bits Interface I²C (2‑wire) Clock Frequency (fSCL) 400 kHz Write Cycle Time (tWC) 5 ms (max, self‑timed) Supply Voltage (VCC) 2.5 V to 5.5 V Write Endurance 1,000,000 (1 million) cycles Data Retention 40 years Operating Temperature –40°C to +85°C (industrial grade) Package 8‑pin SOIC (SO8N) RoHS Status RoHS compliant, ECOPACK2® Additional features include: 8‑byte Page Write Mode – Supports writing up to 8 bytes in a single self‑timed write cycle. Self‑timed Write Cycle – No external timing control required. Hardware Write Protection – Via the Write Control (WC) pin. Schmitt triggers and noise filters on SDA and SCL inputs for enhanced noise immunity.

A: The device uses a standard 2‑wire I²C serial interface, consisting of the Serial Data (SDA) line and the Serial Clock (SCL) line. The I²C bus supports multiple devices sharing the same two wires, each with its own unique 7‑bit slave address. The M24C02-WMN6TP features three external address pins (E0, E1, E2) that allow up to eight M24C02 devices to share the same I²C bus without address conflicts. The I²C control byte is 1010DDDR, where the three “DDD” bits correspond to the logic levels on E2, E1, and E0 pins. The device supports both 100 kHz (Standard‑mode) and 400 kHz (Fast‑mode) I²C bus speeds. The Write Control (WC) pin provides hardware write protection: when tied high (VCC), all write operations to the entire memory array are inhibited.

A: The M24C02-WMN6TP is engineered for long‑term reliability. Key reliability specifications include: Write Endurance: 1,000,000 (1 million) write/erase cycles per memory cell (minimum). Data Retention: 40 years (minimum). Write Cycle Time: Self‑timed, 5 ms maximum. Operating Temperature: –40°C to +85°C (industrial grade). The device also features built‑in Error Correction Code (ECC) to further enhance data integrity. These specifications make the device suitable for applications that require frequent data updates (e.g., data logging, storing frequently changing configuration parameters) while guaranteeing long‑term data integrity over decades.

A: Thanks to its 2‑Kbit capacity, wide operating voltage (2.5 V to 5.5 V), industrial temperature range (–40°C to +85°C), and small SOIC‑8 package, the M24C02-WMN6TP is well‑suited for a broad range of applications, including: Industrial control systems – Storing configuration parameters, calibration data, and operational logs. Consumer electronics – User settings, device preferences, and calibration constants in smart appliances and portable devices. Medical devices – Device identification, calibration information, and usage logs. Smart meters and IoT devices – Data logging and configuration updates. Automotive electronics – Non‑volatile memory for body control modules and infotainment systems. ⚠️ Important Lifecycle Information: The product lifecycle status for the M24C02-WMN6TP is Active. STMicroelectronics continues to manufacture this device, and multiple major distributors (Mouser, DigiKey, Farnell) list the part as Active with standard lead times. However, the M24C02‑W series (2.5‑5.5V) is an older voltage range. For new designs requiring lower power, ST recommends the M24C02‑F series (1.7V to 5.5V) as a pin‑compatible drop‑in replacement with improved supply range. Engineers should verify current availability with authorised ST distributors, but the M24C02-WMN6TP remains a suitable choice for 5V‑only systems.