Infineon Technologies FM25V20-DG

Overview

FM25V20-DG from Infineon Technologies (formerly Cypress) is a 2-Mbit serial SPI F-RAM memory organized as 256 K × 8, operating at 2.0–3.6 V over –40 °C to +85 °C, with 40 MHz SPI interface, 10¹⁴ read/write endurance, and 151-year data retention. It serves as a hardware-compatible nonvolatile memory replacement for serial flash/EEPROM in real-time data logging and industrial control systems.

For engineers reviewing the FM25V20-DG datasheet, FM25V20-DG pinout, FM25V20-DG application, or FM25V20-DG equivalent, key selection considerations include NoDelay™ write performance, SPI mode 0/3 compatibility, hardware/software write protection, low active current (300 µA @ 1 MHz), and dual-package availability (SOIC-8/TDFN-8).

Technical Context

The FM25V20-DG implements ferroelectric memory array architecture with zero-latency writes-data commits immediately upon byte transfer without polling or erase cycles. Its SPI slave interface supports full-duplex communication at up to 40 MHz with strict timing alignment on SCK rising/falling edges.

Write protection is implemented via three independent mechanisms: hardware WP pin control, software WREN/WRDI instructions, and programmable block protection (1/4, 1/2, or full array). The device includes a read-only Device ID register returning manufacturer and product identifiers.

Key Specifications

Pinout & Package

FM25V20-DG is available in two RoHS-compliant packages: 8-pin SOIC (3.9 mm × 4.9 mm) and 8-pin TDFN (2 mm × 3 mm) with exposed pad (unconnected). Both packages support identical pin functions and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B102QN-SP and AT25SF041-SSHD-B, FM25V20-DG uniquely delivers 2-Mbit capacity with true zero-delay writes, 10¹⁴ endurance, and 2.0 V operation-making it the sole choice for high-frequency, low-voltage, long-life data logging.

Availability

FM25V20-DG is available at Aetrix Electronics and suitable for industrial data loggers, smart metering systems, PLC I/O modules, and medical diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for FM25V20-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

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 markets.

FM25V20-DG belongs to Infineon's F-RAM portfolio-designed specifically for applications demanding extreme write endurance, deterministic latency, and long-term data integrity without complex firmware overhead.

FAQ

Is FM25V20-DG pin-compatible with standard SPI EEPROMs or flash devices?

Yes-FM25V20-DG uses industry-standard SPI pinout (CS, SCK, SI, SO, WP, HOLD, VDD, VSS) and supports SPI modes 0 and 3. It replaces serial EEPROMs (e.g., AT25XXX) and flash (e.g., SST25F) without PCB redesign, though WP/HOLD must be pulled high if unused per datasheet guidance.

Does FM25V20-DG require special initialization or configuration before first use?

No-FM25V20-DG operates immediately after power-up with default settings: write protection disabled, status register unblocked, and SPI ready. Only the WREN instruction is needed before any write; no erase, configuration registers, or calibration sequences are required.

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

When HOLD is pulled LOW during any SPI operation (read, write, or status access), the FM25V20-DG suspends communication immediately-ignoring further SCK edges and CS transitions-while retaining internal state. Operation resumes on HOLD HIGH, provided SCK was LOW during the transition, ensuring deterministic bus arbitration.

Can FM25V20-DG be used in battery-powered devices with strict sleep current budgets?

Yes-FM25V20-DG draws only 3 µA in sleep mode (CS HIGH, VDD ≥ 2.0 V), making it suitable for coin-cell or energy-harvesting applications. Combined with NoDelay™ writes, it minimizes active time, reducing total energy per write to <1 µJ at 3.3 V-over 100× more efficient than comparable EEPROMs.