Cypress F-RAM™ series, FM25040B-GTR, 4Kbit FRAM, SPI interface, 20 MHz clock, 4.5V–5.5V supply, 8-SOIC package, -40°C to 85°C operating temperature.
| Parameter | Value |
|---|---|
| Series | F-RAM™ |
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Clock frequency | 20 MHz |
| Memory interface | SPI |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Technology | FRAM (Ferroelectric RAM) |
| Memory size | 4Kbit |
| Memory format | FRAM |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Memory organization | 512 x 8 |
The Cypress FM25040B-GTR is a 4Kbit ferroelectric RAM from the F-RAM series — a non-volatile memory that writes at bus speed without the write-cycle delays of serial EEPROM. It talks SPI at up to 20 MHz, stores 512 x 8 bits, and holds data without a backup battery. If you are replacing an EEPROM that bottlenecks your write throughput, this is the swap that eliminates the wait states.
The 8-SOIC package is a standard footprint.
No. The supply range is 4.5V to 5.5V — it is a 5V-only part. For a 3.3V rail, use the FM25L04B-GTR which is pin-compatible and runs at 2.7V to 3.6V.
The tube-packaged FM25040B-G is the same die in a tube format. For a low-voltage alternative, the FM25L04B-GTR is pin-compatible but operates at 2.7V to 3.6V.