Microchip 11LC040T-E/TT, 4Kbit Serial EEPROM, Single Wire Interface, 512 x 8 Organization, 100 kHz Clock, 2.5V to 5.5V Supply, -40°C to +125°C, SOT-23-3 Package, Tape & Reel.
| Parameter | Value |
|---|---|
| Memory type | Non-Volatile |
| Mounting | Surface Mount |
| Supply voltage | 2.5V ~ 5.5V |
| Clock frequency | 100 kHz |
| Memory interface | Single Wire |
| Operating temperature | -40°C ~ 125°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Technology | EEPROM |
| Memory size | 4Kbit |
| Memory format | EEPROM |
| Case | TO-236-3, SC-59, SOT-23-3 |
| Memory organization | 512 x 8 |
| Write cycle time - word, page | 5ms |
The Microchip 11LC040T-E/TT is a 4Kbit serial EEPROM that communicates over a single-wire interface, packing 512 x 8 bits of non-volatile storage into a SOT-23-3 package. That third pin is the data line — the other two are supply and ground — which frees up GPIO on a microcontroller compared to a two-wire I²C or SPI part.
The device is organized as 512 x 8 bits, giving a total of 4Kbit of non-volatile EEPROM storage.
Yes — the supply voltage range is 2.5V to 5.5V, so it operates directly from a 3.3V rail without a level shifter.
The 24LC04 is a 4Kbit I²C EEPROM, while the 11LC040T uses a single-wire interface. The 11LC040T saves one GPIO pin and board space with its SOT-23-3 package, but the 24LC04's I²C bus allows multiple devices on the same two wires. The 11LC040T's 100 kHz single-wire clock is slower than the 24LC04's 400 kHz I²C, but for infrequent parameter writes the throughput difference rarely matters.