Microchip Technology 24LC08BT-E/MNY

Overview

24LC08BT-E/MNY from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin. It supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in an 8-lead SOIC package and is used for configuration storage in embedded controllers and power management systems.

For engineers reviewing the 24LC08BT-E/MNY datasheet, 24LC08BT-E/MNY pinout, 24LC08BT-E/MNY application, or 24LC08BT-E/MNY equivalent, key selection criteria include VCC range (2.5–5.5V), I²C timing compliance at 400 kHz, WP-enabled hardware protection, 16-byte page buffer capability, and extended temperature qualification up to +125°C.

Technical Context

The 24LC08BT-E/MNY 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 a 16-byte page write buffer, address pointer logic, and HV generator for EEPROM programming - enabling self-timed erase/write cycles without external timing components.

It uses a fixed 4-bit control code (1010) plus 2-bit block select (B1/B0) to access four independent 256-word memory blocks. Write protection is implemented via dedicated WP pin tied to VCC, disabling all write operations while preserving read functionality across the full 000h–3FFh address space.

Key Specifications

Pinout & Package

24LC08BT-E/MNY is packaged in an 8-lead SOIC (SN) with 150-mil body width, JEDEC MS-012AC compliant, and marked "24LC08BT-E/MNY" per Microchip's standard marking scheme (T = temperature grade E, /MNY = package code for SOIC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC08BT-E/MNY, the 24AA08T-I/MNY offers lower-voltage operation but sacrifices extended temperature support, while the AT24C08D-SSHM-T delivers higher clock speed and no hardware write-protect - making each suitable only after validating voltage, timing, and protection requirements against the target design.

Availability

24LC08BT-E/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive powertrain control, and smart energy metering requiring stable component supply across extended temperature and long-life deployments.

Supply support for 24LC08BT-E/MNY 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 manufacturing and support infrastructure.

The 24LC08B family was designed for reliable, low-power nonvolatile storage in cost-sensitive embedded systems requiring I²C interface simplicity, hardware write protection, and extended temperature resilience.

FAQ

What is the maximum clock frequency supported by the 24LC08BT-E/MNY?

The 24LC08BT-E/MNY supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V. It is not rated for 1 MHz operation - that capability is exclusive to the 24FC08 variant. This 400 kHz limit ensures timing margin compliance across the full –40°C to +125°C temperature range and guarantees reliable acknowledge polling and page write completion detection.

Does the 24LC08BT-E/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC08BT-E/MNY 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 5V, scaling inversely with bus capacitance and speed. The device's Schmitt-trigger inputs and slope control ensure clean signal integrity even with these discrete pull-ups, eliminating need for active termination.

How does hardware write-protection work on the 24LC08BT-E/MNY?

Hardware write-protection on the 24LC08BT-E/MNY is controlled by the WP pin: when tied to VCC, all write operations (byte and page) to the entire 000h–3FFh memory array are inhibited, while read operations remain fully functional. This protection is active immediately and requires no command sequence - making it ideal for safeguarding calibrated parameters or firmware configuration data against accidental or malicious overwrite.

What is the page write buffer size of the 24LC08BT-E/MNY?

The 24LC08BT-E/MNY features a 16-byte page write buffer, allowing up to 16 contiguous bytes to be loaded into the buffer and written to memory in a single internal cycle. This reduces I²C transaction overhead significantly compared to byte-write mode. However, page boundaries are fixed at 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh), and crossing a boundary causes wraparound - requiring firmware to manage alignment.

Is the 24LC08BT-E/MNY qualified for automotive applications?

Yes, the 24LC08BT-E/MNY is AEC-Q100 qualified and rated for extended temperature operation from –40°C to +125°C, meeting automotive Grade 1 requirements. Its construction, testing, and packaging (SOIC-8 /MNY) comply with automotive reliability standards, making it suitable for powertrain, body control, and ADAS subsystems where data integrity under thermal stress is critical.