24LC01BT-I/LT

24LC01BT-I/LT is a 1 Kbit I2C serial EEPROM (128 × 8) used for small, non-volatile data storage in embedded systems.
Key points
- Interface: I2C two-wire, with A0–A2 pins to set the I2C device address (up to 8 devices on the same bus).
- Memory: 128 bytes; supports random and sequential reads; 8-byte page write.
- Performance: typical write cycle about 5 ms; endurance around 1,000,000 write cycles.
- Supply and temp: typically operates from 2.5–5.5 V. Temperature range varies by variant (industrial or extended) per datasheet.
- Packaging: 8-pin packages (DIP/SOIC); “T/LT” suffixes indicate packaging/lead-free or temperature grade variants.
- Applications: small configuration data, calibration constants, event counters, data logging.
Note: exact electrical specs, timing, and temperature range depend on the specific package and lot; consult the datasheet for your variant.

Equivalents (1Kbit I2C EEPROMs): AT24C01/AT24C01A (Atmel/Microchip); CAT24C01/CAT24C01B (ON Semiconductor); M24C01-W (ST); PCA24C01 (NXP); FM24C01 (Fudan Microelectronics). These share the 2‑wire I2C interface, ~128x8 organization, and similar timing—verify addressing/page size for true drop-in compatibility.

Here are the key features of 24LC01BT-I/LT:
- 1 Kbit (128 x 8) I2C serial EEPROM
- I2C two-wire interface (device address: 1010 + A2–A0) with up to 8 devices on a bus
- 8-byte page write; random and sequential read supported
- Single-byte memory addressing (0–127)
- Write cycle time ~5 ms (internal self-timed write)
- Hardware write-protect (WP) input
- Operating voltage: 2.5 V to 5.5 V
- I2C speeds: standard and fast (up to 400 kHz)
- Industrial temp variant: -40°C to +85°C
- Low power: standby currents in the µA range; active currents higher during reads/writes
- Endurance and data retention typical of EEPROMs (robust non-volatile storage)
- 8-pin package with lead-free option (LT indicates lead-free)

- Pin count: 8 pins (DIP-8/SOIC-8). Pinout includes A0, A1, A2, GND, SDA, SCL, WP, Vcc.
- Function: 1-Kbit I2C serial EEPROM (128 x 8) with I2C interface, hardware address pins (A0–A2) and write-protect (WP).

- Manufacturer: Microchip Technology Inc.
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells embedded-control solutions such as microcontrollers, non-volatile memory (EEPROM), analog and interface ICs, and related software/tools.

24LC01BT-I/LT is a 1-kbit I2C EEPROM. Typical application areas:
- Microcontroller systems for non-volatile data: calibration constants, device IDs, configuration flags
- Small data logging: sensor readings, event logs
- Consumer electronics: user menus/settings, operational parameters
- IoT, industrial, and automotive electronics: parameter storage, diagnostics, device identity
- Environments requiring industrial temperature range (-40 to 125°C) and reliable non-volatile memory.

8-pin SOIC (Small Outline) package, 8‑pin SOIC‑8, RoHS lead‑free (LT).