Infineon Technologies FM25V01A-G

Overview

FM25V01A-G from Cypress Semiconductor is a 128-Kbit (16K × 8) serial SPI F-RAM nonvolatile memory with NoDelay™ writes, 10¹⁴ read/write endurance, and 151-year data retention. It operates at 2.0–3.6 V over –40 °C to +85 °C in an 8-pin SOIC package and serves as a hardware drop-in replacement for serial EEPROM or flash in high-write-cycle data logging systems.

For engineers reviewing the FM25V01A-G datasheet, FM25V01A-G pinout, FM25V01A-G application, or FM25V01A-G equivalent, key selection criteria include write latency (zero wait states), SPI mode 0/3 compatibility, WP/HOLD pin behavior, and industrial-temperature guaranteed endurance-critical for real-time event capture and power-fail-safe storage.

Technical Context

The FM25V01A-G implements ferroelectric memory array architecture with synchronous SPI slave interface, supporting up to 40 MHz clock frequency and zero-latency byte/page writes without polling. Its internal status register enables software-configurable block protection (1/4, 1/2, or full array) and write-enable latching.

It features dual SPI mode support (Mode 0: CPOL=0, CPHA=0; Mode 3: CPOL=1, CPHA=1), hardware write protection via active-low WP pin, and HOLD pin suspension of ongoing transfers while SCK is low-ensuring deterministic bus arbitration in multi-tasking microcontroller environments.

Key Specifications

Pinout & Package

FM25V01A-G is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package with standard 1.27 mm pitch and gull-wing leads. Pin functions are electrically and mechanically defined per JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF041A-SSHN-B and BR24G128FJ-WE2, FM25V01A-G delivers 100 million× higher endurance, zero-latency writes, and native SPI HOLD/WP support-making it uniquely suited for deterministic, high-frequency, power-interrupt-prone embedded logging.

Availability

FM25V01A-G is available at Aetrix Electronics and suitable for industrial data loggers, smart utility meters, PLC configuration storage, and medical event recorders requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for FM25V01A-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

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

FM25V01A-G belongs to Cypress's F-RAM product line, engineered specifically to replace serial flash and EEPROM in applications demanding rapid, frequent, and deterministic nonvolatile writes without endurance or latency penalties.

FAQ

Does FM25V01A-G require external high-voltage programming or erase pulses?

No. FM25V01A-G uses ferroelectric memory cells that switch polarization states at standard VDD (2.0–3.6 V), eliminating charge pumps, erase cycles, and high-voltage generators. All writes occur synchronously with SPI clock edges using only the core supply voltage-reducing system complexity and EMI.

Can FM25V01A-G be used with microcontrollers lacking hardware SPI peripherals?

Yes. The device supports bit-banged SPI using any GPIO pins, provided timing requirements (tSU, tH, tCYC) are met. The HOLD pin allows safe interruption of transfers, and SI/SO can be wired together for 3-wire operation-enabling use with resource-constrained 8-bit MCUs.

What happens to ongoing memory operations when the HOLD pin is asserted?

When HOLD is pulled LOW while SCK is LOW, the FM25V01A-G immediately suspends the current SPI transaction-whether read, write, or status access-and tri-states SO. SCK and CS are ignored until HOLD returns HIGH, preserving internal state and enabling precise multi-tasking coordination without data corruption.

Is the Device ID accessible during normal operation without disrupting memory access?

Yes. The RDID command (0x9F) reads Manufacturer ID (0x01) and Product ID (0x01) in two bytes via standard SPI, requiring only CS activation and no interference with concurrent memory operations. This enables runtime BOM verification and field firmware validation without halting data logging.