Microchip Technology 24LC08BH-I/MS

Overview

24LC08BH-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 industrial temperature range (–40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for memory addresses 200h–3FFh. It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs.

For engineers reviewing the 24LC08BH-I/MS datasheet, 24LC08BH-I/MS pinout, 24LC08BH-I/MS application, or 24LC08BH-I/MS equivalent, key selection criteria include VCC min (2.5V), page write buffer size (16 bytes), endurance (1 million cycles), data retention (>200 years), and MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The 24LC08BH-I/MS implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes within physical page boundaries (000h–0FFh, 100h–1FFh, etc.).

Write protection is controlled solely by the WP pin: tied to VCC, it disables writes to the upper half-array (200h–3FFh); tied to VSS, full array access is enabled. The device uses self-timed erase/write cycles (typ. 3 ms) and includes VCC threshold detection to inhibit programming below 1.5V.

Key Specifications

Pinout & Package

24LC08BH-I/MS is supplied in an 8-pin MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for compact PCB layouts and automated assembly. Pin 1 is A0 (no internal connection); pins A1 and A2 are similarly unconnected and may be left floating or tied to VSS/VCC without effect.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC08BH-I/MS, the 24AA08H-I/MS enables lower-voltage operation but lacks automotive qualification, while the AT24C08D-MAHM-T delivers faster clock support and stronger ESD protection at the cost of package compatibility and increased bill-of-materials complexity.

Availability

24LC08BH-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded power sequencer settings requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for 24LC08BH-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 microcontroller, analog, and Flash-IP solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.

The 24LC08BH belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in space- and cost-constrained embedded systems.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC08BH-I/MS?

The 24LC08BH-I/MS requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Below this voltage, write operations are disabled by the internal VCC threshold detector, and read functionality may become unreliable. This distinguishes it from the 24AA08H variant, which supports down to 1.7V.

Does the 24LC08BH-I/MS support page writes across memory boundaries?

No, the 24LC08BH-I/MS does not support page writes across physical page boundaries. Each page is 16 bytes (e.g., 000h–00Fh, 010h–01Fh). Attempting a page write that crosses a boundary causes wraparound within the current page, overwriting earlier bytes. Application firmware must enforce alignment to prevent unintended data loss.

How is hardware write-protection implemented on the 24LC08BH-I/MS?

Hardware write-protection on the 24LC08BH-I/MS is controlled exclusively by the WP pin: when tied to VCC, writes to memory addresses 200h–3FFh are inhibited while reads remain fully functional; when tied to VSS, the entire 8 Kbit array (000h–3FFh) is writable. No internal registers or software commands affect this behavior.

What package type does the 24LC08BH-I/MS use, and are the A0–A2 pins functional?

The 24LC08BH-I/MS uses an 8-pin MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch). Pins A0, A1, and A2 are not internally connected - they serve no function in the 24LC08BH family and may be left floating or tied to VSS/VCC without affecting device operation or I²C addressing.

Can the 24LC08BH-I/MS be used in automotive applications?

The 24LC08BH-I/MS is qualified for industrial temperature range (–40°C to +85°C) only. For automotive applications requiring –40°C to +125°C operation, Microchip offers the 24LC08BH-E/MS variant. Using the -I/MS version in under-hood environments risks parametric failure and is not supported by Microchip's automotive qualification testing.