Infineon Technologies FM24C64B-GTR

Overview

FM24C64B-GTR from Infineon Technologies is a 64-kbit ferroelectric RAM (FRAM) IC with I²C interface, 1 MHz maximum clock frequency, 2.7–5.5 V supply voltage, and 1 million write endurance cycles. It serves as non-volatile memory in real-time data logging systems requiring fast write capability without wear leveling.

For engineers reviewing the FM24C64B-GTR datasheet, FM24C64B-GTR pinout, FM24C64B-GTR application, or FM24C64B-GTR equivalent, key selection criteria include I²C timing compliance at 1 MHz, byte/page write latency ≤ 300 ns, zero write delay (no write cycle wait), retention > 10 years at +85°C, and SOIC-8 package compatibility with legacy EEPROM footprints.

Technical Context

This FRAM device uses a ferroelectric capacitor-based memory cell to achieve true non-volatility with SRAM-like write performance. Unlike EEPROM or flash, it requires no internal write-erase cycles or high-voltage programming pulses.

The I²C interface supports standard (100 kHz) and fast-mode (400 kHz) operation, plus fast-mode Plus (1 MHz) with full ACK timing compliance. Addressing uses a 7-bit slave address with A0/A1 pins for hardware selectable device addressing up to four devices on one bus.

Key Specifications

Pinout & Package

FM24C64B-GTR is housed in an 8-pin SOIC package (5.3 mm width, JEDEC MS-012AC), compatible with standard SOIC-8 PCB footprints and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar non-volatile serial memory applications.

Compared with CY14B108L-ZSP25XI, FM24C64B-GTR offers seamless I²C integration and lower system-level complexity; compared with 24LC64-E/P, it delivers 10⁷× higher endurance and eliminates write-time uncertainty - critical for deterministic embedded logging.

Availability

FM24C64B-GTR is available at Aetrix Electronics and suitable for industrial data loggers, smart metering systems, and medical diagnostic devices requiring stable component supply and long-term manufacturability.

Supply support for FM24C64B-GTR 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, security ICs, and memory solutions, with global R&D and manufacturing infrastructure.

The FM24Cxx FRAM family targets high-reliability, low-power embedded systems where rapid, unlimited non-volatile writes replace legacy EEPROM or battery-backed SRAM.

FAQ

Is FM24C64B-GTR pin-compatible with standard 64K-bit I²C EEPROMs like 24LC64?

Yes - FM24C64B-GTR uses the same SOIC-8 package and identical pinout (A0, A1, WP, VSS, SDA, SCL, NC, VCC) as industry-standard 24LC64 EEPROMs, enabling direct PCB-level replacement without layout changes.

Does FM24C64B-GTR require special I²C timing or pull-up resistor values?

No - it complies fully with I²C Fast-mode Plus (1 MHz) timing specifications. Standard 2.2–4.7 kΩ pull-ups used for 400 kHz EEPROMs work reliably; no timing adjustments or bus arbitration changes are needed.

What happens during power loss while writing to FM24C64B-GTR?

Writes are atomic and non-interruptible: if VCC drops below 2.7 V during a write, the transaction aborts cleanly with no data corruption or partial writes - unlike EEPROM, which risks page corruption during brown-out.

Can FM24C64B-GTR operate at 3.3 V and interface with 1.8 V I/O microcontrollers?

It operates from 2.7–5.5 V and tolerates 3.3 V I/O levels, but its SDA/SCL pins are not 1.8 V tolerant. A level shifter is required for direct connection to 1.8 V MCUs; 3.3 V MCUs interface natively.