Infineon Technologies FM25V20A-DGTR

Overview

FM25V20A-DGTR from Infineon is a 2-Mbit serial SPI ferroelectric RAM (F-RAM), logically organized as 256K × 8, operating at up to 40 MHz with industrial temperature range (–40°C to +85°C), 10¹⁴ read/write endurance, and 151-year data retention. It serves as a nonvolatile memory replacement for serial flash/EEPROM in real-time data logging systems requiring zero-delay writes and high write-cycle reliability.

For engineers reviewing the FM25V20A-DGTR datasheet, FM25V20A-DGTR pinout, FM25V20A-DGTR application, or FM25V20A-DGTR equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection (WP pin + WRSR), 2.0–3.6 V supply operation, and SOIC-8/DFN-8 package options for space-constrained industrial controllers.

Technical Context

The FM25V20A-DGTR implements a synchronous SPI slave interface with no internal write latency-data commits immediately after byte transfer without polling. Its ferroelectric memory array eliminates erase-before-write cycles and supports true byte-level random access over the full 256K address space.

It integrates a 3-bit nonvolatile status register controlling block protection (1/4, 1/2, or full array), WPEN bit enabling hardware write protection via the WP pin, and a fixed Device ID (Manufacturer ID = 0x01, Product ID = 0x20) readable via RDID command for host identification and configuration validation.

Key Specifications

Pinout & Package

FM25V20A-DGTR is available in two RoHS-compliant packages: 8-pin SOIC (3.9 mm × 4.9 mm) and 8-pin DFN (5 mm × 6 mm, exposed pad not connected). Both share identical pin functions and logic-level compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B102QN-SXIT and AT25SF041-SSHD-B, FM25V20A-DGTR uniquely delivers SPI-native 40 MHz zero-latency writes with 10¹⁴ endurance-making it optimal for high-frequency deterministic logging where flash latency or parallel bus overhead is unacceptable.

Availability

FM25V20A-DGTR is available at Aetrix Electronics and suitable for energy metering, industrial PLCs, medical sensor hubs, and automotive telematics requiring stable component supply, long-term lifecycle support, and guaranteed industrial-grade performance.

Supply support for FM25V20A-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, connectivity, and security solutions for industrial, automotive, and IoT markets.

The FM25V20A belongs to Infineon's F-RAM product line, engineered specifically to replace serial flash and EEPROM in applications demanding unlimited write endurance, instant writes, and extended data retention without complex wear-leveling firmware.

FAQ

Is FM25V20A-DGTR pin-compatible with standard SPI EEPROMs like AT25DF041?

Yes-FM25V20A-DGTR uses identical SOIC-8 and DFN-8 footprints and matches the standard SPI pinout (CS, SCK, SI, SO, VDD, VSS, WP, DNU), enabling direct PCB-level replacement of 2-Mbit serial EEPROMs without layout changes. The DNU pin must be tied to VDD, and WP functionality is backward-compatible with existing EEPROM write-protection schemes.

Does FM25V20A-DGTR require special initialization or firmware changes to replace serial flash?

No special initialization is needed-the device powers up ready for SPI communication. Firmware changes are minimal: remove flash-specific erase commands and polling loops, since FM25V20A-DGTR writes complete synchronously with the last clock edge. Standard SPI read/write opcodes (0x03, 0x02) function identically, preserving existing driver logic.

What is the maximum junction temperature and thermal derating behavior for continuous 40 MHz operation?

FM25V20A-DGTR is rated for junction temperatures up to +125°C. At 40 MHz and +85°C ambient, typical power dissipation is 12 mW in SOIC-8 (θ_JA = 140°C/W), resulting in ~10°C junction rise-well within limits. Derating is not required below +85°C ambient; above that, reduce clock frequency linearly per the datasheet's AC timing table to maintain t_CYCLE ≥ 25 ns.

Can the EXPOSED PAD on the DFN package be grounded to improve thermal performance?

No-the EXPOSED PAD in the DFN package is electrically isolated from the die and must remain unconnected (floating or optionally tied to VSS only for mechanical stability). Soldering it to ground violates the datasheet requirement and risks shorting internal bond wires. Thermal performance relies solely on top-side convection and PCB copper area under the body, not the pad.