STMicroelectronics M24C04 series EEPROM, M24C04-FMB5TG, 4Kbit I2C, 512x8 organization, 400kHz clock, 1.7-5.5V supply, -20°C to 85°C, 8-UFDFPN (2x3) exposed-pad package, 5ms write cycle.
| Parameter | Value |
|---|---|
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 1.7V ~ 5.5V |
| Clock frequency | 400 kHz |
| Memory interface | I²C |
| Operating temperature | -20°C ~ 85°C (TA) |
| Package | Tape & Reel (TR) |
| Technology | EEPROM |
| Access time | 900 ns |
| Memory size | 4Kbit |
| Memory format | EEPROM |
| Case | 8-UFDFN Exposed Pad |
| Memory organization | 512 x 8 |
| Write cycle time - word, page | 5ms |
The M24C04-FMB5TG: No official replacement part number has been published by STMicroelectronics for this specific package variant; any functional substitute requires verifying the package footprint (8-UFDFPN 2x3 mm) and I2C address compatibility.
The bus runs at up to 400 kHz. The 5ms write cycle per page is the figure that matters — a blocking write holds the bus for that duration, so a firmware loop that polls the ack bit without yielding will stall for the full page write time. Restructure as interrupt-driven or split writes into shorter operations if the main loop has cycle hard limits.
1.7 V to 5.5 V operating range means 3.3 V is well within the window. Under load transients the rail stays safely above the lower limit; the UFDFPN package does not create a thermal issue at EEPROM access currents on a 3.3 V rail.