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Infineon Technologies FM31L278-GTR
- Part No.:
- FM31L278-GTR
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized ICs
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Description:
- IC PROCESSOR COMPANION 14SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
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- Shipping:
Product Details
FM31L278-GTR — 256-Kbit F-RAM Processor Companion
FM31L278-GTR is an Infineon integrated processor companion combining 256 Kbit (32K × 8) nonvolatile F-RAM with a real-time clock, watchdog timer, low-voltage reset, counters, comparator and a 64-bit serial number. The device communicates over a two-wire I²C-compatible interface and operates from 2.7 V to 3.6 V.
Infineon marks the exact FM31L278-GTR orderable model end of life. Confirm lifecycle and authorized sourcing before selecting it for a new design.
Overview
The FM31L278 family integrates fast-write ferroelectric memory and supervisory functions used around a host microcontroller. Unlike EEPROM, F-RAM writes occur at bus speed without a long internal programming cycle. The FM31L278 density is 256 Kbit, organized as 32K × 8. A battery-backup input supports the real-time clock domain according to the manufacturer's circuit requirements.
Key Advantages
Nonvolatile working memory
256-Kbit F-RAM supports frequent updates without an EEPROM-style write delay.
Integrated timekeeping
Real-time clock and backup supply input keep timekeeping functions close to the host.
Processor supervision
Low-voltage reset and programmable watchdog help detect supply and firmware faults.
Board consolidation
Counters, comparator and factory serial number reduce the need for separate support devices.
Feature Summary
F-RAM endurance
The family datasheet specifies 100 trillion read/write cycles and 151-year data retention at 65 °C under its stated conditions.
Serial interface
Two-wire I²C-compatible communication supports bus speeds up to 1 MHz.
Supervisory blocks
Includes a watchdog timer, reset circuitry, two event counters and a power-fail comparator.
Identity
On-chip 64-bit serial number can provide a stable device identifier.
Package & Footprint
Infineon identifies the model as a 14-pin SOIC, package PG-DSO-14, with tape-and-reel ordering. The LCDChip product record says 14-SOIC (0.154", 3.90mm Width); its registered package name is 14-SOIC. Verify the manufacturer's package outline, pin-1 mark, land pattern and dimensions before PCB release.
- Match the manufacturer's PG-DSO-14 outline and pin-1 orientation.
- Route the I²C bus and crystal pins per the reference design.
- Review decoupling and backup-supply requirements in the datasheet.
The expected catalog JPG is missing both locally and on the production site. It is retained here only as a review placeholder, not as a verified footprint drawing.
Pin Functions
The following signal groups are described in Infineon's pin-definition table. Use its package drawing for exact numbered pin placement.
Main supply, ground and RTC backup-supply connections.
Two-wire serial data and clock with device-address inputs.
32.768-kHz crystal connections for the real-time clock.
Processor reset signal from the supervisory circuit.
Inputs to the two event counters.
Power-fail comparator input and multifunction comparator or calibration output.
Key Specifications
| Orderable model | FM31L278-GTR |
|---|---|
| Manufacturer | Infineon Technologies |
| Memory type | Nonvolatile ferroelectric RAM (F-RAM) |
| Density | 256 Kbit (32K × 8) |
| Operating supply | 2.7 V to 3.6 V |
| Operating temperature | −40 °C to +85 °C |
| Serial interface | Two-wire I²C-compatible, up to 1 MHz |
| Memory endurance | 100 trillion read/write cycles, per family datasheet |
| Data retention | 151 years at 65 °C, per family datasheet conditions |
| Integrated functions | RTC, watchdog, low-voltage reset, two counters, comparator, 64-bit serial number |
| Package | 14-pin SOIC / Infineon PG-DSO-14 |
| Ordering format | Tape and reel |
| Lifecycle | End of life on Infineon's exact-model product page |
Electrical values and retention claims have conditions and limits in the official datasheet. Verify the current revision for the final design.
Replacement Considerations
This exact orderable part is end of life. Any replacement requires a comparison of memory density and map, RTC backup behavior, watchdog timing, reset threshold, comparator and counter functions, I²C address, pinout, package outline and qualification. Similar family names do not establish pin or functional compatibility.
No internal alternative-product link is asserted without an exact LCDChip catalog match and engineering verification.
Manufacturer Information
Infineon Technologies lists FM31L278-GTR as the 256-Kbit F-RAM member of the FM31L276/FM31L278 integrated processor-companion family. The manufacturer's exact-model page identifies it as end of life. Technical characteristics above follow Infineon's FM31L276/FM31L278 family datasheet, revision *D.
Applications
Industrial controllers
Event logging and reset supervision around a microcontroller.
Embedded data recorders
Frequent nonvolatile updates with RTC timestamps.
Metering systems
Low-voltage processor support and persistent counts.
Legacy equipment maintenance
Exact-part replacement where lifecycle and sourcing constraints are accepted.
Quality & Authenticity
Check exact suffix, package marking, traceability and manufacturer documentation for this end-of-life device. Confirm storage and solderability requirements for the procurement lot. The unavailable catalog JPG cannot serve as evidence of device authenticity or mechanical fit.
FAQ
How much memory does this model provide?
256 Kbit, organized as 32K × 8.
Does it include an RTC and watchdog?
Yes; both are integrated alongside F-RAM and additional processor-support functions.
Is the exact model still active?
No. Infineon's exact-model page marks FM31L278-GTR end of life.
Is another FM31L family device a drop-in replacement?
Do not assume so; check density, pinout, functions, package and lifecycle against the full datasheets.
Engineering Notice
Verify the backup-power path, crystal network, I²C bus pull-ups, reset behavior and power-fail thresholds in the complete circuit. Resolve the missing production package JPG before publication. This end-of-life model needs lifecycle and sourcing review; no replacement is approved by this description alone.
FM31L278-GTR Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Processor Companion
- Applications:
- Processor-Based Systems
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
- Grade:
- -
- Qualification:
- -
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