Infineon Technologies FM25V05-G

Overview

FM25V05-G from Infineon Technologies (formerly Cypress) is a 512-Kbit serial SPI ferroelectric RAM (F-RAM) organized as 64K × 8, operating at up to 40 MHz with 2.0–3.6 V supply, 10¹⁴ read/write endurance, and 151-year data retention. It serves as a hardware-compatible nonvolatile memory replacement for serial flash and EEPROM in real-time data logging and industrial control systems.

For engineers reviewing the FM25V05-G datasheet, FM25V05-G pinout, FM25V05-G application, or FM25V05-G equivalent, key selection criteria include NoDelay™ write performance, SPI Mode 0/3 compatibility, hardware/software write protection, low active current (300 µA @ 1 MHz), and industrial temperature range (–40 °C to +85 °C).

Technical Context

The FM25V05-G implements a synchronous SPI slave interface with zero-latency writes-data commits immediately upon byte transfer without polling or internal write cycles. Its ferroelectric memory array eliminates erase-before-write overhead and supports full 64K-byte addressing via two-byte address opcodes.

Write protection is implemented through dual-layer control: hardware-level WP pin assertion (active-low) and software-configurable status register bits enabling 1/4, 1/2, or full-array block lock. Device ID includes manufacturer and product identifiers readable via dedicated opcode.

Key Specifications

Pinout & Package

FM25V05-G is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package with gull-wing leads, RoHS-compliant, and rated for industrial temperature operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B108L-SP25XI and AT25SF041-SSHD-B, FM25V05-G uniquely balances 512 Kbit density, 2.0 V operation, 40 MHz speed, and 10¹⁴ endurance-making it optimal for high-cycle industrial logging where voltage margin and deterministic latency are design constraints.

Availability

FM25V05-G is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for FM25V05-G 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and memory solutions for industrial, automotive, and IoT applications.

The FM25V05-G belongs to Infineon's F-RAM product line, engineered specifically for applications demanding ultra-high endurance, instant-write nonvolatility, and seamless SPI drop-in replacement of legacy serial EEPROM and flash.

FAQ

Is FM25V05-G pin-compatible with standard SPI EEPROMs like AT25XXX series?

Yes-FM25V05-G uses identical 8-pin SOIC packaging and SPI command set (including WREN, WRDI, RDSR, WRSR, READ, WRITE), enabling direct hardware replacement without PCB redesign. Pin functions match industry-standard definitions for CS, SCK, SI, SO, WP, and HOLD, though HOLD and WP default to weak pull-up and require explicit tie-off if unused.

Does FM25V05-G require external high-voltage programming or erase pulses?

No-FM25V05-G performs true RAM-like writes at bus speed with no erase cycle, high-voltage pulse, or write latency. All writes complete within one SPI byte transfer window (≤250 ns at 40 MHz), eliminating the need for status polling, timeout handling, or wear-leveling firmware.

How does the HOLD pin function during an active SPI transaction?

When HOLD is asserted LOW during any SPI operation (read, write, or status access), the FM25V05-G immediately suspends communication-ignoring further SCK edges and CS transitions-while retaining internal state. The transaction resumes on the next rising SCK edge after HOLD returns HIGH, provided SCK was LOW during the HOLD assertion.

What is the minimum VDD voltage required for reliable SPI communication at 40 MHz?

FM25V05-G guarantees full 40 MHz SPI operation down to 2.7 V. At 2.0–2.6 V, maximum clock frequency is derated to 20 MHz per datasheet AC specifications; however, all functionality-including NoDelay™ writes and 10¹⁴ endurance-remains fully operational across the entire 2.0–3.6 V range.