STMicroelectronics M24C02-FMC6TG

Overview

M24C02-FMC6TG from STMicroelectronics is a 2-Kbit (256-byte) I²C-compatible serial EEPROM organized as 256 × 8 bits, operating as a slave device on standard and fast-mode I²C buses (up to 400 kHz), with 1.7 V to 5.5 V supply range over –40 °C to +85 °C, 16-byte page size, and hardware write protection via WC pin - used for configuration storage in industrial sensors and embedded microcontroller systems.

For engineers reviewing the M24C02-FMC6TG datasheet, M24C02-FMC6TG pinout, M24C02-FMC6TG application, or M24C02-FMC6TG equivalent, key selection criteria include its 1.7 V minimum VCC operation, DFN5 (UFDFPN5) 5-pin package with no E0–E2 pins, 4 million write cycles, 200-year data retention, and I²C address compatibility with 1010xxx0/1 format under constrained temperature conditions.

Technical Context

The M24C02-FMC6TG implements an I²C slave interface with start/stop detection, ACK/NACK handshaking, and internal address counter auto-increment. Its memory array uses floating-gate EEPROM technology with on-chip charge pump for byte/page writes, and includes a power-on-reset (POR) circuit that prevents spurious writes during power ramp-up.

It supports three read modes - random, current-address, and sequential - with SDA as open-drain I/O requiring external pull-up. The WC pin enables hardware-level full-array write inhibition, while the DFN5 package omits E0–E2 pins, fixing device address bits b3–b1 to 000 per Table 2, limiting bus topology to single-device addressing at 1010000R/W.

Key Specifications

Pinout & Package

Package: UFDFPN5 (ECOPACK2), 1.7 mm × 1.4 mm, 0.5 mm pitch, no exposed pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02FJ-WE2, the M24C02-FMC6TG uniquely combines 5-pin DFN miniaturization, integrated WC pin, and guaranteed 1.7 V operation across –40 °C to +85 °C - making it optimal for space-constrained, safety-critical, low-voltage embedded systems where hardware-level write lock is mandatory.

Availability

M24C02-FMC6TG is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded controller boot parameter retention requiring stable component supply across extended product lifecycles.

Supply support for M24C02-FMC6TG 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 microcontrollers, power ICs, sensors, and memory products for industrial, automotive, and consumer markets.

The M24C02-F series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-voltage, space-constrained embedded applications requiring guaranteed data integrity and long-term reliability in harsh environments.

FAQ

What is the function of the WC pin on M24C02-FMC6TG?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When WC is low or left floating, writes are enabled. This provides deterministic, glitch-immune protection against accidental overwrites during power transients or firmware errors - unlike software-based locks that depend on correct MCU execution.

Why does the DFN5 package omit E0, E1, and E2 pins?

The UFDFPN5 (DFN5) package physically excludes E0–E2 pins to fix the device address to 1010000R/W (binary), eliminating external address configuration. This simplifies PCB layout and ensures deterministic I²C addressing in single-EEPROM systems, but prohibits sharing the same bus with other devices using 1010xxx addresses unless isolated by bus switch.

Can M24C02-FMC6TG operate at 1.6 V across the full temperature range?

No. At 1.6 V, operation is restricted: read is guaranteed from –40 °C to +85 °C, but write is only specified above 0 °C (for M24C02-F grade). Full 1.6–5.5 V operation with write capability requires ambient temperature ≥ 0 °C; for –40 °C write support, minimum VCC is 1.7 V per DS9398 Rev 8 Section 8.

How does the M24C02-FMC6TG handle sequential reads at end-of-memory?

In DFN5-packaged M24C02-FMC6TG, sequential reads do not roll over from address FFh back to 00h after reaching the last byte. Instead, subsequent addresses and data are undefined. To ensure valid data, firmware must explicitly manage address bounds or use random/current-address reads with controlled byte counts - a design constraint specific to this 5-pin variant.