STMicroelectronics M24C64-DFMC6TG

Overview

M24C64-DFMC6TG from STMicroelectronics is a 64-Kbit I²C-compatible EEPROM organized as 8 K × 8 bits, featuring 32-byte page write capability, 1.7 V to 5.5 V single-supply operation over –40 °C to +85 °C, and an additional lockable 32-byte identification page. It serves as nonvolatile configuration storage in microcontroller-based systems requiring robust data retention and I²C bus compatibility up to 1 MHz.

For engineers reviewing the M24C64-DFMC6TG datasheet, M24C64-DFMC6TG pinout, M24C64-DFMC6TG application, or M24C64-DFMC6TG equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C speed mode support (100/400/1000 kHz), write protection via WC pin, identification page lockability, and ECOPACK2-compliant UFDFPN5 (1.7 × 1.4 mm) packaging.

Technical Context

The device implements a standard I²C slave protocol with 7-bit device addressing, supporting START/STOP detection, ACK/NACK handshaking, and byte/page write sequences triggered by STOP condition. Its internal address counter auto-increments after each read or write, enabling sequential access across the full 8 Kbyte array.

It integrates hardware write protection via the WC pin (active-high disable), chip enable inputs (E2–E0) for multi-device bus addressing, and on-chip power-on reset (POR) to prevent spurious writes during power ramp. The M24C64-D variant adds dedicated identification page addressing (device type identifier 1011b) and permanent lock functionality using a specific A10=1 address bit pattern.

Key Specifications

Pinout & Package

Package: UFDFPN5 (1.7 mm × 1.4 mm, ECOPACK2, 0.5 mm pitch), lead-free and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the M24C64-DFMC6TG uniquely combines hardware WC pin control, standardized 1011b ID page addressing, and ECOPACK2 UFDFPN5 packaging-enabling smaller footprint, simpler lock implementation, and higher immunity in safety-critical designs.

Availability

M24C64-DFMC6TG is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer device configuration, medical device serialization, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M24C64-DFMC6TG 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 M24C64 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-voltage I²C data storage in space-constrained and thermally demanding applications-from smart meters to wearable health monitors.

FAQ

What is the function of the WC pin on M24C64-DFMC6TG?

The WC (Write Control) pin is an active-high hardware enable that disables all write operations to the entire memory array when driven high. When left floating or pulled low, writes are permitted. This provides fail-safe protection against unintended writes during power transients or firmware errors, and is independent of I²C command execution.

How does the identification page differ from main memory in M24C64-DFMC6TG?

The identification page is a separate 32-byte memory region accessible only via device select code 1011b (vs. 1010b for main array). It supports standard page write but adds a dedicated lock instruction (A10=1) that permanently disables further writes to this page, making it ideal for storing immutable identifiers like serial numbers or calibration certificates.

Can M24C64-DFMC6TG operate reliably at 1.7 V across its full temperature range?

Yes - the M24C64-DF variant (including -DFMC6TG) is fully specified for 1.7 V to 5.5 V operation over –40 °C to +85 °C. At 1.7 V, all AC timing parameters (e.g., tBUF, tHD:STA) meet datasheet limits, and the internal charge pump generates sufficient voltage for EEPROM cell programming, validated per DS6638 Rev 38.

Which package variant corresponds to the part number suffix MC6TG?

The "MC6TG" suffix denotes the UFDFPN8 (2 mm × 3 mm) package with ECOPACK2 compliance, not UFDFPN5. However, M24C64-DFMC6TG is documented by ST as a UFDFPN5 (1.7 mm × 1.4 mm) variant - the "MC6TG" designation reflects ST's internal package code mapping to DFN8-2×3mm, but electrical and functional specs align with the UFDFPN5 footprint per DS6638 Section 9.