Infineon Technologies FM25V02-DG

Overview

FM25V02-DG from Cypress Semiconductor is a 256-Kbit (32 K × 8) serial SPI F-RAM nonvolatile memory with NoDelay™ writes, 10¹⁴ read/write endurance, and 151-year data retention. It operates from 2.0 V to 3.6 V across –40 °C to +85 °C, supports 40-MHz SPI (modes 0 and 3), and replaces serial EEPROM/flash in real-time data logging systems.

For engineers reviewing the FM25V02-DG datasheet, FM25V02-DG pinout, FM25V02-DG application, or FM25V02-DG equivalent, key selection criteria include write latency independence from bus speed, hardware/software write protection granularity (1/4, 1/2, full array), Device ID verification capability, and industrial-temperature SOIC/DFN package compatibility.

Technical Context

The FM25V02-DG implements a ferroelectric memory array accessed via standard SPI protocol with zero-latency writes-data commits immediately after byte transfer without polling. Its internal logic includes a dedicated instruction decoder, address counter, and nonvolatile status register controlling WPEN, BP0/BP1, and WEL bits.

SPI interface compliance covers modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1); clock input (SCK) accepts 0–40 MHz with no minimum duty cycle requirement. The HOLD pin suspends ongoing operations synchronously when asserted low while SCK is low, preserving bus state integrity during host interruptions.

Key Specifications

Pinout & Package

FM25V02-DG is available in an 8-pin SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) with gull-wing leads and RoHS-compliant finish. Pin functions are electrically identical between SOIC and DFN variants; DFN variant includes an isolated exposed pad not connected to die.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB85RS2MT-FPNSE1 and AT25SF041-SSHD-B, FM25V02-DG uniquely delivers deterministic zero-latency writes, industrial-temperature HOLD support, and 10¹⁴ endurance-making it optimal for high-integrity, high-write-frequency embedded logging where reliability outweighs density or raw speed.

Availability

FM25V02-DG is available at Aetrix Electronics and suitable for industrial data loggers, smart metering systems, PLC I/O modules, and medical diagnostic equipment requiring stable component supply, long-lifecycle assurance, and guaranteed RoHS compliance.

Supply support for FM25V02-DG 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 emphasis on low-power, robust memory and microcontroller platforms.

The FM25V02-DG belongs to Cypress's F-RAM product line, engineered specifically to replace serial EEPROM and flash in applications demanding rapid, unlimited, and deterministic nonvolatile writes without complex firmware overhead.

FAQ

What is the maximum SPI clock frequency supported by FM25V02-DG?

The FM25V02-DG supports up to 40 MHz SPI clock frequency in both Mode 0 and Mode 3. This allows sustained data transfer rates of 4 MB/s for read operations and matching write throughput without wait states. The device tolerates clock pauses and variable duty cycles, simplifying interface design with microcontrollers lacking precise SPI timing control.

How does the HOLD pin function during an active memory operation?

When HOLD is pulled LOW while SCK is LOW, the FM25V02-DG immediately suspends the current read or write operation and places SI, SO, and SCK in high-impedance or inactive states. Internal address and status registers retain their values. Operation resumes on the next rising edge of SCK after HOLD returns HIGH, with no data corruption or restart required.

Can FM25V02-DG be used as a direct hardware replacement for standard SPI EEPROMs?

Yes-FM25V02-DG uses identical 8-pin SOIC pinout, SPI command set (WREN, WRDI, RDSR, WRSR, READ, WRITE), and voltage range (2.0–3.6 V) as common serial EEPROMs. No PCB redesign is needed; firmware changes are limited to removing write-polling loops and adjusting timing margins due to eliminated latency.

What write protection mechanisms does FM25V02-DG provide?

FM25V02-DG offers three-tiered write protection: (1) Hardware lock via WP pin disabling Status Register writes when WPEN=1; (2) Software disable using WRDI instruction; (3) Block protection (1/4, 1/2, or full array) controlled by BP0/BP1 bits in the Status Register. All layers can be combined for defense-in-depth security in regulated environments.