Cypress F-RAM™ series, FM24C04B-G, 4Kbit FRAM, I²C interface, 1 MHz clock, 550 ns access, 4.5-5.5 V supply, 8-SOIC, -40 to 85 °C.
| Parameter | Value |
|---|---|
| Series | F-RAM™ |
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Clock frequency | 1 MHz |
| Memory interface | I²C |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tube |
| Technology | FRAM (Ferroelectric RAM) |
| Access time | 550 ns |
| Memory size | 4Kbit |
| Memory format | FRAM |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Memory organization | 512 x 8 |
The 550 ns access time is the time from address match to first data bit available on SDA. At 1 MHz I²C, each bit takes 1 µs, so the access is inside one clock cycle — no wait-state insertion needed on the master side. The limiting factor for throughput is the bus speed, not the memory array.
Active product status, ROHS3 compliant.
Yes, in most cases. The FM24C04B-G is pin-compatible with a 24C04 and uses the same I²C protocol. The key difference: FRAM writes at bus speed with no write-cycle delay, so no polling or page-write wait is needed. The 1 MHz clock rate is also faster than the 400 kHz typical of most 24C04s. Verify the supply voltage — this part runs on 4.5 V to 5.5 V, not 2.7 V to 5.5 V like some low-voltage 24C04 variants.
FM24C04 is the base product number for the 4Kbit FRAM family. The FM24C04B-G is a specific variant: it operates at 4.5 V to 5.5 V supply and comes in an 8-SOIC package. Other variants like FM24CL04B-G run at 2.7 V to 3.6 V. The 'B' suffix typically indicates a specific revision or temperature range.