Infineon Technologies FM24CL64B-DGTR

General Description of FM24CL64B-DGTR

The Infineon Technologies FM24CL64B-DGTR introduces a robust solution for nonvolatile memory applications with its 64-Kbit ferroelectric random access memory (FRAM). Designed for industrial and embedded systems, this device balances high-speed operation, endurance, and low power consumption. Leveraging industry-standard I2C communication, the FM24CL64B-DGTR addresses frequent and rapid write demands where traditional EEPROMs may struggle, making it ideal for scenarios such as data logging and industrial controls.

Important Technical Details of FM24CL64B-DGTR

Product selection engineers and procurement professionals will find the FM24CL64B-DGTR distinguished by the following core specifications:

Memory Technology: FRAM (Ferroelectric RAM)

Memory Size and Organization: 64 Kbit, organized as 8K × 8 bits

Interface: I2C, supporting bus speeds up to 1 MHz

Write Cycle Time: NoDelay™ writes eliminate latency, completing operations as fast as the bus can transfer data

Endurance: Rated for 100 trillion read/write cycles, dramatically surpassing standard EEPROM figures

Data Retention: Up to 151 years, supporting mission-critical long-term data preservation

Supply Voltage: 2.7 V to 3.6 V

Operating Temperature Range: –40°C to +85°C for reliable performance in harsh environments

Power Consumption: 100 μA (typical) active at 100 kHz, 3 μA (typical) standby

Package: 8-DFN (4 × 4.5 mm) with exposed pad for surface mount applications

Compliance: RoHS3 compliant, REACH unaffected, MSL 3 (168 hours)

FM24CL64B-DGTR Pinout and Pin Functions

Pinout details are crucial for hardware integration and multi-device deployment. The FM24CL64B-DGTR's 8-DFN package supports standard I2C address multiplexing with three address inputs (A2-A0), enabling up to eight devices on a shared bus. The pin assignments are as follows:

A2-A0: Device select address pins, supporting multi-device configurations

SDA: I2C serial data/address, bi-directional

SCL: I2C serial clock, input

WP: Write Protect, disables write operations across all addresses when high

Vss: Ground

VDD: Power supply input

EXPOSED PAD: Not connected electrically, should not be soldered to PCB for optimal reliability

Pin functionalities are optimized for flexibility and noise immunity, with Schmitt trigger input buffers and slope-controlled outputs. Engineers should note the write protection capability for mission-critical data, and ensure correct I2C address selection for multi-device systems.

FM24CL64B-DGTR Memory Structure Information

The FM24CL64B-DGTR memory array is organized as 8,192 locations of 8 bits each, supporting individual and sequential access. The device architecture enables address selection via a 13-bit address accessed through the I2C interface. Internally, the device manages address latching and automatic incrementing for sequential operations, with the memory access time dictated exclusively by the I2C bus speed.

Engineering Scenario:

For high-frequency data logging—such as meter readings or control signals—the FM24CL64B-DGTR’s ability to handle rapid, repeated writes without endurance degradation simplifies system design and ensures data integrity.

FM24CL64B-DGTR I2C Protocol and Communication

FM24CL64B-DGTR utilizes the industry-standard 2-wire I2C interface. As a slave device, it supports standard bus protocol elements including START, STOP, data, and acknowledge conditions. The device can be addressed and operated at up to 1 MHz bus speed, with legacy timing support for 100 kHz and 400 kHz.

Key considerations include:

Addressing: The FM24CL64B-DGTR is selected using a device-type code (slave ID) and device-select address bits, accommodating up to eight devices per bus.

Data Transfer: Supports byte-level and multi-byte transfers, with no delay on writes, and immediate readiness for subsequent operations.

Write Protection: The WP pin functionality allows system designers to safeguard the memory against unintended writes, essential in secured system designs.

FM24CL64B-DGTR Memory Access Read and Write Processes

The FM24CL64B-DGTR differs from typical EEPROMs in its handling of read/write cycles. No busy polling is required; data is written instantly at bus speed, and reads are similarly immediate.

Write Operations:

Initiated with slave address and memory address bytes, followed by data bytes.

Supports single and multiple byte writes, with seamless address rollover.

No internal page buffering, eliminating write delay risks.

Read Operations:

Supports both current address and selective (random) reads.

Sequential reads increment internal address latch automatically, supporting block data retrieval.

Operations are halted using no-acknowledge, STOP, or START conditions to avert bus contention.

Application Example:

In logging systems where write frequency and speed are paramount (e.g., event recorders in industrial environments), FM24CL64B-DGTR ensures near-instant data commit, preventing data loss in power-down or system-reset scenarios.

FM24CL64B-DGTR Reliability and Data Storage Capabilities

Engineering teams often grapple with endurance limitations in conventional memory. The FM24CL64B-DGTR alleviates these concerns:

Endurance: 100 trillion read/write cycles per row, supporting years of continuous operation even under high-frequency access (e.g., >3000 operations per second for over a decade).

Data Retention: 151 years, critical for devices requiring secure long-term storage.

Design Note: Spread frequent access across different memory rows to optimize longevity, though FM24CL64B-DGTR’s endurance is practically unlimited in typical use-cases.

FM24CL64B-DGTR Electrical Specs and Environmental Standards

Robust electrical and environmental characteristics underpin FM24CL64B-DGTR’s suitability for industrial deployment:

Supply Voltage: Operates reliably from 2.7 V to 3.6 V

Active/Standby Current: Exceptionally low, supporting battery-powered and energy-efficient designs

Wide Operating Temperature: -40°C to +85°C enables operation in both outdoor and industrial machinery contexts

Compliance: Fully RoHS3 compliant, unaffected by REACH restriction lists, and meets MSL 3 for moisture sensitivity

FM24CL64B-DGTR Package Type and Installation Instructions

The FM24CL64B-DGTR is available in a compact 8-DFN package with exposed pad. For optimal performance:

Exposed Pad: Not electrically connected; should not be soldered to the PCB.

Surface Mount: Facilitates integration with high-density PCBs.

Pinout: Ensures straightforward interface with microcontrollers or processors supporting I2C.

This packaging appeals to designs demanding minimal footprint and reliable assembly in automated production lines.

Alternative and Substitute Options for FM24CL64B-DGTR

For engineers seeking comparables, or facing sourcing constraints, several models share similar functionality:

Infineon Technologies FM24CL64B (other ordering codes or variants within this family)

Serial (I2C) EEPROMs: While pin-compatible, these may suffer from slower write speeds and limited endurance compared to FRAM.

Serial FRAM ICs from other manufacturers: Devices supporting 64-Kbit, I2C interface, similar voltage and temperature ranges

Cross-reference to legacy Cypress FM24CL64B

When selecting a replacement or alternate, pay particular attention to write speed, endurance, and I2C protocol implementation to ensure seamless drop-in substitution.

Conclusion

The Infineon Technologies FM24CL64B-DGTR stands out as a high-performance, reliable, and flexible nonvolatile memory well suited for demanding industrial and embedded applications. Its unparalleled endurance, instant write capability, and robust environmental tolerance make it a preferred solution for systems requiring frequent data updates and long-term integrity. With a detailed understanding of its architecture, interface, and operational features, engineers can confidently integrate the FM24CL64B-DGTR, while procurement teams can assess its advantages over conventional alternatives and equivalents in mission-critical scenarios.