Microchip Technology 24LC01BT-I/MS

Overview

24LC01BT-I/MS 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 buffer, and industrial temperature range (–40°C to +85°C). It operates from 2.5V to 5.5V, supports up to 400 kHz clock frequency, and delivers ≤1 µA standby current - ideal for low-power embedded systems requiring nonvolatile parameter storage in space-constrained designs.

For engineers reviewing the 24LC01BT-I/MS datasheet, 24LC01BT-I/MS pinout, 24LC01BT-I/MS application, or 24LC01BT-I/MS equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), I²C timing compliance at 400 kHz, MSOP-8 package footprint, WP pin functionality for hardware-level memory protection, and endurance of 1 million erase/write cycles with >200-year data retention.

Technical Context

The 24LC01BT-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes, while the 8-byte page write buffer allows burst writes within a single physical page boundary (00–7F hex).

Write protection is enforced via the dedicated WP pin: tied to VSS for full read/write access, or to VCC to disable all write operations across the entire 128-byte array. The device uses self-timed erase/write cycles with maximum 5 ms duration and supports acknowledge polling to detect write completion without fixed delays.

Key Specifications

Pinout & Package

24LC01BT-I/MS is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (per Microchip drawing C04-061-MS Rev E). Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01BT-I/MS, the 24AA01T-I/MS extends low-voltage operation but shares identical packaging and feature set, while the AT24C01D-MAHM-T increases clock speed at the cost of reduced minimum VCC margin - both require explicit validation of write-protection implementation and timing compliance in target systems.

Availability

24LC01BT-I/MS is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensors, and automotive body control modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for 24LC01BT-I/MS 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 leading provider of microcontrollers, analog components, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The 24LC01B series was designed specifically for cost-sensitive, low-power embedded systems needing compact, I²C-compatible nonvolatile memory with hardware write protection and extended temperature operation.

FAQ

What is the maximum I²C clock frequency supported by the 24LC01BT-I/MS?

The 24LC01BT-I/MS supports a maximum I²C clock frequency of 400 kHz when operated within its specified VCC range of 2.5V to 5.5V. This complies with the Fast-mode I²C specification and ensures reliable communication with standard I²C masters without timing violations.

Does the 24LC01BT-I/MS require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC01BT-I/MS requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. A typical value is 2 kΩ for 400 kHz operation at 3.3V or 5V, ensuring proper rise times and noise immunity per I²C bus specifications.

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

The WP (Write-Protect) pin on the 24LC01BT-I/MS provides hardware-level memory protection: when tied to VCC, it disables all write operations to the entire 128-byte memory array (00–7F hex), while read operations remain fully functional - a critical safeguard against accidental or malicious data corruption.

What is the endurance rating of the 24LC01BT-I/MS, and how is it measured?

The 24LC01BT-I/MS is rated for 1,000,000 erase/write cycles at 25°C and 5.5V, measured using page-mode writes. This endurance specification ensures reliable operation in applications requiring frequent parameter updates, such as calibration storage in test equipment or configuration logging in industrial controllers.

Is the 24LC01BT-I/MS pin-compatible with other members of the 24XX01 family?

Yes, the 24LC01BT-I/MS is pin-compatible with other 24XX01 variants in the same MSOP-8 package (e.g., 24AA01T-I/MS, 24FC01T-I/MS), sharing identical pin assignments for VCC, VSS, SDA, SCL, WP, and unused A0–A2 terminals - enabling drop-in substitution where voltage and speed requirements align.