Microchip Technology 24LC08BT-I/MS

Overview

24LC08BT-I/MS 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 industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin, 16-byte page buffer, and Schmitt-trigger inputs for noise immunity - deployed in embedded system configuration storage and sensor calibration data retention.

For engineers reviewing the 24LC08BT-I/MS datasheet, 24LC08BT-I/MS pinout, 24LC08BT-I/MS application, or 24LC08BT-I/MS equivalent, key selection criteria include VCC min (2.5V), I²C speed grade (400 kHz), MSOP-8 package footprint, WP-enabled hardware protection, and 1 million write-cycle endurance - all critical for low-power, space-constrained industrial control and automotive subsystems.

Technical Context

The 24LC08BT-I/MS implements a two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups, internal address pointer for sequential reads, and block-select addressing using B1/B0 bits in the control byte. Its architecture includes on-chip page latches, HV generator for EEPROM programming, and dedicated write-protection logic tied to the WP pin state.

It supports three read modes (current address, random, sequential) and two write modes (byte and page), with automatic self-timed erase/write cycles and ACK polling for bus efficiency. The device uses Schmitt-trigger inputs and output slope control to suppress ground bounce and tolerate bus noise up to 50 ns spikes.

Key Specifications

Pinout & Package

24LC08BT-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 (optional VSS connection). Pin 1 is marked with a dot or bevel; pin numbering follows standard MSOP convention (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC08BT-I/MS, the 24AA08T-I/MS offers lower-voltage flexibility at the cost of reduced speed below 2.5V, while the AT24C08D-MAHM-T provides automotive qualification in a physically larger TSSOP package - both require layout or voltage-margin verification before substitution.

Availability

24LC08BT-I/MS is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive sensor calibration, medical device safety logs, and smart meter firmware parameters requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for 24LC08BT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC08B family was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage - emphasizing robust I²C interoperability, extended endurance, and industrial temperature resilience.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24LC08BT-I/MS?

The 24LC08BT-I/MS requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Below 2.5V, functionality is not specified - unlike the 24AA08 variant, which supports down to 1.7V. This 2.5V threshold ensures stable internal charge pump operation for EEPROM writes and reliable I²C timing compliance at 400 kHz.

Does the 24LC08BT-I/MS support page write operations, and what is the maximum page size?

Yes, the 24LC08BT-I/MS supports page write operations with a maximum buffer size of 16 bytes. Writes crossing physical page boundaries (every 16-byte aligned address) wrap within the current page instead of advancing - requiring firmware to align multi-byte writes or split them at page boundaries. This behavior is inherent to the device's internal address pointer logic and applies identically across all 24LC08B variants.

How does the WP pin function on the 24LC08BT-I/MS, and what happens when it is left unconnected?

On the 24LC08BT-I/MS, the WP pin must be actively driven to VSS (write enabled) or VCC (full memory write-protected). Leaving it floating is not recommended: internal leakage may cause indeterminate protection state, risking unintended writes or read-only lockout. The MSOP-8 package fully supports WP functionality - unlike CSP variants where WP is omitted.

What is the endurance rating of the 24LC08BT-I/MS, and under what conditions is it specified?

The 24LC08BT-I/MS is rated for 1,000,000 erase/write cycles at 25°C and 5.5V, measured in page mode. This endurance applies to the entire 8-Kbit array and is validated per JEDEC standards. Real-world endurance may vary with temperature, voltage, and write pattern - but the specification guarantees minimum cycle count under controlled lab conditions, ensuring longevity in infrequently updated configuration storage.

Is the 24LC08BT-I/MS AEC-Q100 qualified, and what automotive temperature grades does it support?

No, the 24LC08BT-I/MS is not AEC-Q100 qualified. It is rated for industrial temperature range only (–40°C to +85°C). For automotive applications, Microchip offers the 24LC08B-E/MS variant (extended temp: –40°C to +125°C), but AEC-Q100 qualification is reserved for specific part numbers like 24LC08B-E/MNY - not the 24LC08BT-I/MS. Always verify qualification status in the official Microchip part numbering matrix.