Infineon Technologies FM25V02A-DGQTR

Overview

FM25V02A-DGQTR from Cypress Semiconductor is a 256-Kbit (32K × 8) serial SPI ferroelectric RAM (F-RAM) with no write delay, 10¹⁴ read/write endurance, and guaranteed operation from –40 °C to +105 °C. It replaces serial EEPROM/flash in data-logging, industrial control, and metering systems where rapid nonvolatile writes are critical.

For engineers reviewing the FM25V02A-DGQTR datasheet, FM25V02A-DGQTR pinout, FM25V02A-DGQTR application, or FM25V02A-DGQTR equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection, 33-MHz max clock rate, low-power sleep mode (12 µA), and RoHS-compliant 8-pin DFN packaging.

Technical Context

The FM25V02A-DGQTR implements a synchronous SPI slave interface supporting modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), with data latched on SCK rising edge and output on falling edge. Its internal F-RAM array enables true byte-write at bus speed-no polling or erase cycles required.

Write protection is implemented via dual-layer control: hardware-level WP pin (active-low, disables Status Register writes when WPEN=1) and software-level WRSR/RDSR commands with block-protection bits for 1/4, 1/2, or full array. Device ID provides manufacturer ID (0x01) and product ID (0x22) for host identification.

Key Specifications

Pinout & Package

FM25V02A-DGQTR is housed in an 8-pin dual flat no-leads (DFN) package (5 mm × 6 mm, 0.5 mm pitch) with exposed thermal pad not connected internally. Pin functions are validated per Cypress Document 001-90844 Rev. *G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB85RS2MT-FPN-GE1 and AT25SF041-MAHB-T, FM25V02A-DGQTR uniquely delivers extended temperature support, hardware HOLD interrupt, Device ID verification, and 10¹⁴ endurance - making it optimal for mission-critical industrial and automotive logging where reliability and deterministic timing outweigh density or raw speed.

Availability

FM25V02A-DGQTR is available at Aetrix Electronics and suitable for industrial data loggers, smart electricity meters, automotive telematics units, and PLC I/O modules requiring stable component supply across extended temperature and high-reliability write cycles.

Supply support for FM25V02A-DGQTR 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 nonvolatile memory and programmable system-on-chip solutions for industrial, automotive, and IoT applications.

The FM25V02A belongs to Cypress's F-RAM product line, engineered specifically to replace serial EEPROM and flash in applications demanding infinite endurance, instant writes, and extended temperature operation without complex wear-leveling firmware.

FAQ

Is FM25V02A-DGQTR pin-compatible with standard SPI EEPROMs like AT25DF041?

Yes - FM25V02A-DGQTR uses identical 8-pin DFN pinout (SCK, CS, SI, SO, WP, HOLD, VSS, VDD) and supports standard SPI opcodes (0x03 Read, 0x02 Write, 0x05 RDSR, 0x01 WREN). No PCB redesign is needed for drop-in replacement, though HOLD and WP pins must be properly terminated per application requirements.

Does FM25V02A-DGQTR require external high-voltage programming circuitry?

No - FM25V02A-DGQTR performs all writes at standard VDD (2.7–3.6 V) with no charge pump or high-voltage generator. Unlike EEPROM or flash, it writes data directly using ferroelectric polarization switching, eliminating need for external VPP supplies or complex timing sequences.

How does the HOLD pin function during active SPI transactions?

When HOLD is pulled LOW while SCK is LOW, the FM25V02A suspends the current SPI operation (read/write/status access) and tri-states SO. SCK and CS are ignored until HOLD returns HIGH; then the suspended transaction resumes from the exact bit position, preserving bus integrity without restart overhead.

What is the significance of the 'DGQTR' suffix in the part number?

'DGQTR' denotes Cypress's tape-and-reel packaging variant: DFN package (D), green/RoHS-compliant (G), industrial temperature grade (Q), tape-and-reel (TR). It specifies 3,000-unit reel quantity, Pb-free terminations, and full –40 °C to +105 °C qualification per JEDEC JESD22-A108.