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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies FM25V20A-DG

Name: FM25V20A-DG
Brand: Infineon Technologies
SKU: FM25V20A-DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FM25V20A-DG

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 8-WDFN Exposed Pad

Datasheet:: FM25V20A-DG.pdf

Description:: IC FRAM 2MBIT SPI 40MHZ 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:2,879

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Product details

Overview

FM25V20A-DG from Infineon is a 2-Mbit serial SPI F-RAM organized as 256K × 8, operating at up to 40 MHz with 2.0–3.6 V supply, industrial temperature range (–40°C to +85°C), and 10¹⁴ read/write endurance. It serves as nonvolatile memory in real-time data logging systems where rapid, delay-free writes prevent data loss during power interruption.

For engineers reviewing the FM25V20A-DG datasheet, FM25V20A-DG pinout, FM25V20A-DG application, or FM25V20A-DG equivalent, key selection criteria include NoDelay™ write performance, hardware/software write protection flexibility, SPI Mode 0/3 compatibility, and 151-year data retention without refresh.

Technical Context

The FM25V20A-DG implements a ferroelectric memory array with zero-write-latency operation: each byte written is committed immediately upon successful SPI transfer, eliminating polling and enabling deterministic timing-critical writes. Its status register supports configurable block protection (1/4, 1/2, or full array) and WP pin-driven hardware lock.

It operates as an SPI slave with dual-mode support (Mode 0 and Mode 3), uses MSB-first transmission, and integrates a read-only Device ID register returning manufacturer ID (0x01) and product ID (0x20). The logic block includes dedicated instruction decoder, clock generator, and nonvolatile status register with 3-bit configuration.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory density	2 Mbit (256K × 8), directly addressable via 18-bit SPI address field
Max SPI frequency	40 MHz - enables sub-μs per-byte write commit time without wait states
Write endurance	10¹⁴ cycles - supports >27,000 writes/sec continuously for 10+ years in high-frequency logging
Data retention	151 years at +85°C - no refresh required, validated per JEDEC JESD22-A117
Supply voltage	2.0 V to 3.6 V - compatible with 2.5 V and 3.3 V microcontroller I/O domains
Operating temperature	–40°C to +85°C - qualified for industrial control, metering, and automotive body electronics
Active current	800 µA at 1 MHz - enables low-power sensor node memory buffering

Pinout & Package

FM25V20A-DG is available in 8-pin SOIC (3.9 mm × 4.9 mm) and 8-pin DFN (5 mm × 6 mm) packages. Both variants share identical pin functions and electrical behavior; DFN includes an unconnected exposed pad not to be soldered.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select input	Active-low enable: drives device into standby when HIGH; initiates SPI transaction on falling edge
SCK	Serial clock input	Synchronizes all I/O; rising edge latches SI, falling edge drives SO; supports 0–40 MHz with interruptible clock
SI	Serial input	Receives opcodes, addresses, and write data; must be driven to valid logic level to meet IDD spec
SO	Serial output	Drives read data and status bits; tristated except during read/SO-read commands; transitions on SCK falling edge
WP	Write protect input	Hardware lock: prevents Status Register writes when WPEN=1 and WP=LOW; must tie to VDD if unused
VDD	Power supply	2.0–3.6 V core and I/O supply; decoupling capacitor required near pin
VSS	Ground	Reference return path for all internal circuits and I/O drivers
DNU	Do Not Use	No internal connection; must be tied to VDD per design rule to avoid floating node

Key Features

Feature	Design Value
NoDelay™ write architecture	Zero-latency commit: data written to nonvolatile array immediately after SPI byte transfer completes - no polling or timeout handling required
Dual SPI mode support	Native compatibility with Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) - interoperable with most MCU SPI peripherals without firmware modification
Configurable write protection	Three-layer scheme: hardware (WP pin), software disable (WRDI), and software block lock (1/4, 1/2, or full array) - enables secure firmware parameter storage
Ferroelectric process reliability	10¹⁴ endurance + 151-year retention at +85°C - eliminates wear leveling, garbage collection, and ECC overhead required by flash/EEPROM
Low-power sleep mode	3 µA typical quiescent current - extends battery life in portable data loggers and IoT edge nodes between wake events

Applications

Industrial Data Logger

Smart Energy Meter

Use Scenario: Continuous timestamped sensor sampling (e.g., temperature, voltage, current) at 100 Hz with power-fail-safe storage.

IC Role / Device Role / Timing Role: Nonvolatile buffer storing last 10 seconds of raw data before shutdown; acts as deterministic write sink with no latency penalty.

Use Value: Guarantees zero data loss during brownout due to immediate write commit and 10¹⁴ endurance supporting >27 years of daily 100-Hz logging.

Use Scenario: Storing tamper-evident billing registers, tariff tables, and calibration coefficients in ANSI C12.22-compliant meters.

IC Role / Device Role / Timing Role: Secure, long-retention configuration memory with hardware WP pin permanently enabled to prevent accidental overwrite.

Use Value: Eliminates EEPROM wear-out risk and flash programming delays during firmware updates while maintaining 151-year data integrity at meter operating temperature.

PLC I/O Module

Automotive Body Control Unit

Use Scenario: Logging diagnostic fault codes and operational history in DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: High-reliability event recorder interfacing directly to ARM Cortex-M7 SPI peripheral at 33 MHz.

Use Value: Enables deterministic 100-ns worst-case write response - critical for meeting IEC 61131-3 cycle-time constraints without CPU intervention.

Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in 12 V automotive body domain controllers.

IC Role / Device Role / Timing Role: Low-voltage (2.7 V min) nonvolatile storage accessible during cold-crank conditions with guaranteed operation down to –40°C.

Use Value: Maintains user preferences across battery disconnects and supports 2.0–3.6 V supply range matching automotive LDO outputs without level-shifting.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY14V104N-SP25XI	4-Mbit density, same 40 MHz SPI, but requires 3.0–3.6 V only; no DFN option	Lacks 2.0 V operation and industrial-grade DFN package; higher density may increase cost unnecessarily	Select only if 4-Mbit capacity is required and 3.3 V supply is fixed
AT25DF041A-SHN-T	4-Mbit serial NOR flash; 100k write cycles; 20 ms page program time; requires polling	Cannot support high-frequency writes; unsuitable for real-time logging; needs firmware polling logic	Avoid where write latency or endurance is critical; acceptable only for infrequent firmware storage

Compared with CY14V104N-SP25XI and AT25DF041A-SHN-T, FM25V20A-DG uniquely delivers 2.0 V operation, 10¹⁴ endurance, and true zero-latency writes - making it the only viable choice for deterministic, high-cycle, low-voltage nonvolatile buffering.

Availability

FM25V20A-DG 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 across extended product lifecycles.

Supply support for FM25V20A-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 German semiconductor manufacturer specializing in power management, sensing, and memory solutions for industrial, automotive, and IoT applications.

The FM25V20A belongs to Infineon's F-RAM product line, engineered specifically for applications demanding ultra-high endurance, deterministic write timing, and long-term data retention without refresh or wear leveling.

FAQ

Is FM25V20A-DG pin-compatible with standard SPI EEPROMs or flash devices?

Yes - FM25V20A-DG uses industry-standard 8-pin SOIC and DFN footprints with identical CS, SCK, SI, SO, WP, VDD, and VSS pin assignments. Its command set is designed as a hardware drop-in replacement for serial EEPROM and flash, supporting the same opcodes for read, write, and status access.

Does FM25V20A-DG require special initialization or configuration before first use?

No - FM25V20A-DG powers up ready for immediate SPI communication. The write enable latch defaults to disabled; users must issue WREN before any write operation. No factory calibration, trimming, or register setup is needed beyond standard SPI protocol adherence.

How does the DNU pin affect PCB layout and reliability?

The DNU pin has no internal connection and must be tied to VDD per Infineon's design guidelines. Leaving it floating risks ESD susceptibility and violates DC specifications. Tying to VDD ensures stable bias and meets IDD test conditions defined in the datasheet.

Can FM25V20A-DG operate reliably during power ramp-up or brownout conditions?

Yes - FM25V20A-DG includes built-in power-on reset (POR) and voltage monitor circuitry. Writes are inhibited until VDD reaches 1.8 V, and ongoing operations abort safely below 1.7 V. This prevents partial writes and ensures data integrity during unstable supply conditions.

FM25V20A-DG Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: F-RAM™

Package/Case:: 8-WDFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FRAM

Technology:: FRAM (Ferroelectric RAM)

Memory Size:: 2Mbit

Memory Organization:: 256K x 8

Memory Interface:: SPI

Clock Frequency:: 40 MHz

Write Cycle Time - Word, Page:: -

Access Time:: -

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN (5x6)

FM25V20A-DG FAQ

1.How can I place an order for FM25V20A-DG through Aetrix?

Please submit a Request for Quotation (RFQ) for FM25V20A-DG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FM25V20A-DG reliable?

The price and inventory of FM25V20A-DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FM25V20A-DG is usually 5 days.

3.What payment methods are accepted for FM25V20A-DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FM25V20A-DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FM25V20A-DG?

FM25V20A-DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FM25V20A-DG order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FM25V20A-DG?

For technical support, including FM25V20A-DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FM25V20A-DG requirements.

6.How does Aetrix verify that FM25V20A-DG is sourced from the original manufacturer or authorized distributors?

All FM25V20A-DG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FM25V20A-DG meets industry standards.

7.What is the process for return or replacement of FM25V20A-DG?

All FM25V20A-DG units undergo pre-shipment inspection (PSI). If there is an issue with FM25V20A-DG, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FM25V20A-DG part is unused and in its original packaging.

Return procedure for FM25V20A-DG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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