STMicroelectronics M24C64-DFCT6TP/K, 64Kbit I²C EEPROM, 1 MHz clock, 450 ns access, 1.7V-5.5V supply, 8K x 8 organization, 8-WLCSP package, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 1.7V ~ 5.5V |
| Clock frequency | 1 MHz |
| Memory interface | I²C |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Technology | EEPROM |
| Access time | 450 ns |
| Memory size | 64Kbit |
| Memory format | EEPROM |
| Case | 8-XFBGA, WLCSP |
| Memory organization | 8K x 8 |
| Write cycle time - word, page | 5ms |
The write cycle time for a word or page is 5 ms. That is the period the internal charge pump needs to program the memory cells. During that time the I²C bus is held (no new commands accepted). For a design that writes calibration data at power-up, a 5 ms pause is invisible. For a datalogger that writes every few hundred milliseconds, budget the write time into the polling loop.
The full datasheet is available from STMicroelectronics. The base product number is M24C64, and the specific variant -DFCT6TP/K is documented in the M24C64 series datasheet, which covers the I²C interface, write timing, and AC/DC characteristics.
Yes. The supply voltage range of 1.7V to 5.5V means the part operates directly on a 5V rail. The I²C bus pins are 5V-tolerant, so no level shifter is needed when interfacing with 5V microcontrollers or ASICs.
The M24C64 series is rated for 1 million write cycles per byte and 40 years data retention at 85°C, per the STMicroelectronics datasheet. This is typical for the I²C EEPROM family.
Use a hot-air rework station with a fine nozzle, set to 280-300°C with low air flow. Preheating the board to 100-120°C reduces thermal shock. The WLCSP has no leads — the solder balls are directly on the die pads. A stencil with 0.3 mm apertures and a reflow profile matching SAC305 solder paste works. After reflow, inspect under magnification for solder bridging or head-in-pillow defects.
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