Microchip Technology 24LC01BT-I/MC

Overview

24LC01BT-I/MC from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page write buffer, and operation down to 2.5V. It supports 400 kHz clock frequency, delivers ≤1 mA active current and ≤1 µA standby current (I-temp), and is rated for -40°C to +85°C industrial temperature range. It is used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.

For engineers reviewing the 24LC01BT-I/MC datasheet, 24LC01BT-I/MC pinout, 24LC01BT-I/MC application, or 24LC01BT-I/MC equivalent, key selection criteria include VCC min (2.5V), I²C speed grade (400 kHz), package type (8-lead DFN), write-protection implementation (dedicated WP pin), and endurance (1 million cycles).

Technical Context

The 24LC01BT-I/MC implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-byte page latch, address pointer, and self-timed erase/write cycle logic that eliminates external timing dependencies.

It uses a fixed 4-bit device code (1010) with three "don't care" address bits and R/W bit - enabling single-device addressing on shared buses without A0–A2 pin dependency. The WP pin provides hardware-level block write protection across the full 00h–7Fh address space.

Key Specifications

Pinout & Package

24LC01BT-I/MC is supplied in an 8-lead DFN (2 mm × 3 mm) package with wettable flank leads. Pin 1 is A0 (no internal connection); pins A0–A2 are NC and may be left floating or tied to VSS/VCC without functional impact.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24LC01BT-I/MC, the 24AA01T-I/MC extends voltage compatibility downward but shares identical timing and endurance; the AT24C01D-SSHM-T trades hardware WP simplicity for software configurability, increasing firmware complexity but enabling dynamic protection control.

Availability

24LC01BT-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration backup, and power-fail-safe event logging requiring stable component supply across extended production lifecycles.

Supply support for 24LC01BT-I/MC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.

The 24LC01B family is designed for cost-sensitive, space-constrained embedded systems requiring robust, low-power, I²C-compatible EEPROM with hardware write protection and guaranteed 1 million endurance cycles.

FAQ

What is the minimum operating voltage for 24LC01BT-I/MC?

The 24LC01BT-I/MC requires a minimum VCC of 2.5V, as specified in its electrical characteristics table. Operation below this threshold is not guaranteed and may result in failed writes or corrupted reads. This distinguishes it from the 24AA01 series (1.7V min) and aligns it with legacy 5V-tolerant I²C systems. Always verify regulator stability under load before powering the 24LC01BT-I/MC.

Does 24LC01BT-I/MC support 1 MHz I²C communication?

No, the 24LC01BT-I/MC supports up to 400 kHz I²C clock frequency, per its AC characteristics table. It is not compatible with fast-mode plus (1 MHz) - attempting higher speeds will cause timing violations and communication failures. For 1 MHz operation, consider the 24FC01 variant instead, which is explicitly rated for 1 MHz across its full voltage range.

How does the WP pin function on 24LC01BT-I/MC?

The WP pin on 24LC01BT-I/MC is a hardware write-protection input: when tied to VCC, all write operations (byte and page) to the entire 00h–7Fh memory array are inhibited; read operations remain fully functional. When tied to VSS, full read/write access is enabled. No internal pull-up or pull-down is present - external connection is mandatory for deterministic behavior.

Can multiple 24LC01BT-I/MC devices share the same I²C bus?

No - the 24LC01BT-I/MC has a fixed I²C address (1010xxxR/W) with no configurable A0–A2 pins (all NC). Therefore, only one 24LC01BT-I/MC can reside on a given I²C bus segment. To expand capacity, use higher-density variants (e.g., 24LC02, 24LC04) or alternate part numbers with address pins enabled, such as the 24LC014.

What is the maximum page write size for 24LC01BT-I/MC?

The 24LC01BT-I/MC supports an 8-byte page write buffer, meaning up to eight consecutive bytes can be written in a single transaction - provided they fall within the same physical page boundary (e.g., addresses 00h–07h, 08h–0Fh). Crossing a page boundary causes wraparound, overwriting earlier bytes in the page. Host firmware must enforce page-aligned writes to avoid data corruption.