Infineon Technologies FM24CL16B-DGTR

Overview

FM24CL16B-DGTR from Cypress Semiconductor is a 16-Kbit (2K × 8) serial I²C F-RAM nonvolatile memory with NoDelay™ write capability, 10¹⁴ read/write endurance, and 151-year data retention at +85 °C. It operates from 2.7 V to 3.65 V across –40 °C to +85 °C and serves as a hardware drop-in replacement for I²C EEPROM in real-time data logging and industrial control systems.

For engineers reviewing the FM24CL16B-DGTR datasheet, FM24CL16B-DGTR pinout, FM24CL16B-DGTR application, or FM24CL16B-DGTR equivalent, key selection criteria include write-speed-critical nonvolatile storage, elimination of write polling, high-cycle-count field data capture, and compatibility with legacy I²C timing (100 kHz/400 kHz/1 MHz).

Technical Context

The FM24CL16B-DGTR implements a ferroelectric memory array organized as 2,048 × 8 bits, accessed via standard I²C protocol with 7-bit slave address (1010xxxR/W) and 11-bit internal addressing (8-bit word + 3-bit page). It requires no internal charge pump or write delay circuitry, enabling immediate byte-write completion synchronized to I²C bus timing.

Its interface logic supports START/STOP conditions, ACK/NO-ACK handshaking, and sequential/random read/write modes without address retransmission after initial setup. The device lacks power management beyond POR and relies on external pull-ups on SDA/SCL; WP pin enables hardware write protection by tying to VDD.

Key Specifications

Pinout & Package

FM24CL16B-DGTR is supplied in an 8-pin SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) with gull-wing leads and standard JEDEC MO-002AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C16D-SSHM-T and MB85RC16, FM24CL16B-DGTR delivers deterministic sub-microsecond write commit, guaranteed 151-year retention at full temperature range, and seamless 100/400 kHz timing compatibility - making it optimal for high-frequency, mission-critical data capture where EEPROM latency or FRAM address mismatch introduces risk.

Availability

FM24CL16B-DGTR is available at Aetrix Electronics and suitable for smart metering, industrial PLC data logging, medical calibration storage, and automotive event recording requiring stable component supply and long-term lifecycle support.

Supply support for FM24CL16B-DGTR 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability semiconductor solutions for industrial, automotive, and IoT applications, with expertise in nonvolatile memory and programmable systems.

The FM24CL16B belongs to Cypress's F-RAM product line, engineered specifically to replace EEPROM in applications demanding rapid, unlimited, low-power nonvolatile writes without firmware overhead.

FAQ

What is the maximum I²C clock frequency supported by FM24CL16B-DGTR?

The FM24CL16B-DGTR supports I²C clock frequencies up to 1 MHz under standard operating conditions (VDD = 2.7–3.65 V, TA = –40 °C to +85 °C). This is verified in AC switching characteristics (Table 11, Rev. *L datasheet), with tBUF ≥ 5 μs and tLOW/tHIGH ≥ 0.5 μs minimum. Operation at 1 MHz requires proper bus capacitance control (<400 pF) and appropriate pull-up strength.

Does FM24CL16B-DGTR require external high-voltage programming circuitry?

No. FM24CL16B-DGTR performs writes using standard VDD supply only - no internal charge pump or elevated voltage generator is used. This eliminates the need for external boost circuits, reduces EMI, and enables true single-supply operation. Write energy is drawn directly from VDD, resulting in typical active current of 100 µA at 100 kHz.

How does the WP pin function, and what happens if left unconnected?

The WP (Write Protect) pin is an active-high input with internal pull-down. When tied to VDD, it disables writes to the entire memory map; when grounded or floating, writes are enabled. Leaving WP unconnected defaults to write-enabled due to the internal pull-down, but best practice is explicit grounding or VDD tie-off to prevent noise-induced protection glitches.

Can FM24CL16B-DGTR be used in place of an AT24C16 without hardware or firmware changes?

Yes - FM24CL16B-DGTR uses identical 8-pin SOIC packaging, matching pinout (SDA, SCL, WP, VDD, VSS), and same 7-bit I²C slave address (1010xxx) as AT24C16. Firmware requiring EEPROM-style timing must be updated only to remove write-polling loops; all other register maps, addressing, and command sequences remain identical.