Infineon Technologies FM25V20-DGTR

Overview

FM25V20-DGTR from Infineon Technologies (formerly Cypress) is a 2-Mbit serial SPI F-RAM memory organized as 256 K × 8, operating at up to 40 MHz with 2.0–3.6 V supply, 10¹⁴ 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 FM25V20-DGTR datasheet, FM25V20-DGTR pinout, FM25V20-DGTR application, or FM25V20-DGTR 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 FM25V20-DGTR implements ferroelectric memory technology enabling true RAM-like random-access reads/writes without erase cycles or write latency. Its SPI interface supports dual modes (0 and 3), with data latched on SCK rising edge and output on falling edge - matching standard microcontroller SPI peripherals.

Internal architecture includes an 18-bit address decoder, nonvolatile status register with WPEN bit, Device ID register (manufacturer + product ID), and dedicated hardware write protection via the WP pin. All operations are initiated by opcode-driven transactions following CS activation.

Key Specifications

Pinout & Package

FM25V20-DGTR is supplied in an 8-pin TDFN package (3 mm × 2 mm, 0.5 mm pitch) with exposed pad (NC). Pin functions are electrically identical to the SOIC variant; the TDFN version offers improved thermal dissipation and board space savings.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B102QN-PSOC, FM25V20-DGTR offers simpler SPI-4-wire integration and lower power; compared with AT25SF041-SSHD-B, it delivers 10⁹× greater endurance and eliminates write latency - critical for deterministic real-time systems.

Availability

FM25V20-DGTR is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, PLC I/O modules, and medical diagnostic devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for FM25V20-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

Infineon Technologies is a German semiconductor leader specializing in power management, sensing, and connectivity solutions for industrial, automotive, and IoT applications.

The FM25V20-DGTR belongs to Infineon's F-RAM portfolio, designed specifically to replace legacy serial EEPROM and flash in applications demanding ultra-high endurance, zero-write-latency, and guaranteed data retention without backup power.

FAQ

Is FM25V20-DGTR pin-compatible with standard SPI EEPROMs like AT25DF041?

Yes - FM25V20-DGTR uses identical 8-pin SOIC/TDFN footprints and SPI command set (WREN, WRDI, RDSR, WRSR, READ, WRITE) as common serial EEPROMs. No PCB redesign is needed; only firmware timing adjustments are eliminated due to absence of write polling.

Does FM25V20-DGTR require external high-voltage programming circuitry?

No - unlike flash or EEPROM, FM25V20-DGTR performs all writes at standard VDD (2.0–3.6 V) with no charge pump or high-voltage generator. This simplifies power design, reduces EMI, and improves reliability in noise-sensitive environments.

How does the HOLD pin behave during an active write operation?

When HOLD is asserted LOW during a write, the FM25V20-DGTR suspends the transaction immediately after the current byte is written, holds SCK and data lines idle, and resumes from the exact byte position upon HOLD deassertion - preserving data integrity without corruption or restart overhead.

Can FM25V20-DGTR be used in SPI multi-drop configurations?

Yes - FM25V20-DGTR supports standard SPI multi-slave operation using individual CS lines. Its SO pin enters high-impedance state when CS is HIGH, allowing multiple devices to share SI, SCK, and SO lines without contention or external bus buffers.