Microchip Technology 24LC01BT-E/OT16KVAO

Overview

24LC01BT-E/OT16KVAO 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 operation down to 2.5V. It supports 400 kHz clock frequency, features Schmitt-trigger inputs and slope-controlled outputs for noise immunity, and is rated for extended temperature range (–40°C to +125°C). It is commonly used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the 24LC01BT-E/OT16KVAO datasheet, 24LC01BT-E/OT16KVAO pinout, 24LC01BT-E/OT16KVAO application, or 24LC01BT-E/OT16KVAO equivalent, key selection criteria include VCC min (2.5V), max clock (400 kHz), WP pin functionality, page write capability (8 bytes), and extended-temperature qualification per AEC-Q100.

Technical Context

The 24LC01BT-E/OT16KVAO implements a 2-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an EEPROM array, page latches, X/Y decoders, sense amplifiers, and HV generator for programming - enabling self-timed erase/write cycles without external high-voltage supply.

It uses open-drain SDA/SCL with internal Schmitt triggers and input filtering (50 ns spike suppression), ensuring robust operation on noisy buses. Write protection is implemented via dedicated WP pin tied to VCC to inhibit all writes while permitting reads across the full 00h–7Fh address space.

Key Specifications

Pinout & Package

24LC01BT-E/OT16KVAO is supplied in 5-lead SC-70 (LT) package - compact surface-mount outline measuring 2.00 mm × 1.25 mm × 0.80 mm (L×W×H), with gull-wing leads and exposed thermal pad (optional connection to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA01T-I/OT, the 24LC01BT-E/OT16KVAO trades lower-voltage operation for extended temperature and automotive qualification; compared with 24FC01T-E/OT, it sacrifices 1 MHz speed and 1.7V operation for tighter cost control and proven stability in legacy 400 kHz designs.

Availability

24LC01BT-E/OT16KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration storage, automotive body control module configuration, medical device parameter backup, and smart energy meter firmware patch storage requiring stable component supply across extended temperature ranges.

Supply support for 24LC01BT-E/OT16KVAO 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC01B family was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage in space-constrained packages - targeting industrial, automotive, and medical applications demanding extended temperature operation and AEC-Q100 compliance.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC01BT-E/OT16KVAO?

The 24LC01BT-E/OT16KVAO requires a minimum VCC of 2.5V for guaranteed operation across its full extended temperature range (–40°C to +125°C). Unlike the 24AA01 or 24FC01 variants, it is not specified for operation below 2.5V - attempting to power the 24LC01BT-E/OT16KVAO at 1.8V will result in undefined behavior or failure to respond on the I²C bus.

Does the 24LC01BT-E/OT16KVAO support 1 MHz I²C communication?

No, the 24LC01BT-E/OT16KVAO supports a maximum clock frequency of 400 kHz at VCC ≥2.5V. It does not meet the timing specifications for 1 MHz (fast-mode plus) I²C operation. For 1 MHz capability, consider the functionally compatible 24FC01T-E/OT, which shares the same SC-70 package and pinout but is rated for 1 MHz operation across the full voltage and temperature range.

How does the Write-Protect (WP) pin function on the 24LC01BT-E/OT16KVAO?

On the 24LC01BT-E/OT16KVAO, the WP pin is a logic-level input: when tied to VCC, the entire memory array (addresses 00h–7Fh) becomes write-protected - all write attempts (byte or page) are ignored, though reads remain fully functional. When tied to VSS or left floating (not recommended), normal read/write operation is enabled. This hardware-level protection operates independently of I²C commands and requires no software configuration.

What is the page size and maximum number of bytes that can be written in a single page write cycle for the 24LC01BT-E/OT16KVAO?

The 24LC01BT-E/OT16KVAO has an 8-byte page buffer and enforces strict page boundaries: valid page addresses are 00h–07h, 08h–0Fh, ..., F8h–FFh. A single page write command can transmit up to 8 bytes, but if the starting address + byte count crosses a page boundary (e.g., writing 8 bytes starting at address 07h), data wraps to the beginning of the same page instead of advancing to the next - potentially overwriting earlier bytes. The 24LC01BT-E/OT16KVAO does not auto-increment across pages.

Is the 24LC01BT-E/OT16KVAO qualified for automotive applications?

Yes, the 24LC01BT-E/OT16KVAO is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), making it suitable for non-safety-critical automotive applications such as body control modules, infotainment configuration storage, and sensor calibration data retention. Its qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirming reliability in vehicle environments per industry-standard automotive semiconductor requirements.