Microchip Technology 24LC04BHT-I/MNY

Overview

24LC04BHT-I/MNY from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C). It features hardware write-protection for the upper half-array (100h–1FFh), 16-byte page write buffer, and 5 ms max page write time. Used in embedded systems for parameter storage, calibration data retention, and configuration backup.

For engineers reviewing the 24LC04BHT-I/MNY datasheet, 24LC04BHT-I/MNY pinout, 24LC04BHT-I/MNY application, or 24LC04BHT-I/MNY equivalent, this page delivers verified electrical specs, package mapping to MSOP-8, I²C timing compliance at 400 kHz, and real-world design implications of half-array write-protection and ACK polling support.

Technical Context

The 24LC04BHT-I/MNY implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient multi-byte writes within physical page boundaries (00h–0Fh, 10h–1Fh, etc.).

Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 100h–1FFh while allowing full read access; tied to VSS, full read/write operation is enabled. The device uses self-timed erase/write cycles and supports ACK polling to detect write completion without fixed delay timing.

Key Specifications

Pinout & Package

24LC04BHT-I/MNY is packaged in an 8-lead MSOP (MNY) with exposed pad, measuring 3.0 mm × 3.0 mm × 0.95 mm. Pin 1 is marked by a dot or beveled edge; A0–A2 are no-connects and may be left floating or tied to VSS/VCC without functional impact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC04BHT-I/MNY, the 24AA04HT-I/MNY extends low-voltage operation at identical packaging and timing, while the AT24C04-SSHM-T trades hardware write-protection for broader vendor ecosystem support-making each viable only where their specific voltage, protection, or sourcing advantages align with system constraints.

Availability

24LC04BHT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-qualified nonvolatile memory.

Supply support for 24LC04BHT-I/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC04BH family is part of Microchip's serial EEPROM product line, engineered for reliable, low-power, I²C-based configuration and calibration data storage in industrial, automotive, and medical applications demanding high endurance and long data retention.

FAQ

What is the function of the A0, A1, and A2 pins on the 24LC04BHT-I/MNY?

The A0, A1, and A2 pins on the 24LC04BHT-I/MNY are not internally connected and serve no functional purpose. They may be left floating, tied to VSS, or tied to VCC without affecting device operation, addressing, or I²C communication. This simplifies PCB layout and eliminates the need for external pull-up/down resistors on these pins.

Can the 24LC04BHT-I/MNY operate at 1.8V?

No, the 24LC04BHT-I/MNY has a minimum V_CC specification of 2.5V and is not rated for operation at 1.8V. Attempting to power it below 2.5V may result in unreliable reads/writes or failure to acknowledge I²C transactions. For 1.7V–5.5V operation, consider the pin-compatible 24AA04HT-I/MNY instead.

How does the WP pin affect memory access in the 24LC04BHT-I/MNY?

When the WP pin of the 24LC04BHT-I/MNY is tied to VCC, write operations to memory addresses 100h–1FFh (upper 256 bytes) are inhibited; reads remain fully functional. When WP is tied to VSS, full read/write access to the entire 000h–1FFh address space is enabled. No software configuration is required-protection is purely hardware-enabled.

What is the maximum number of bytes that can be written in a single page write cycle for the 24LC04BHT-I/MNY?

The 24LC04BHT-I/MNY supports a maximum of 16 bytes per page write cycle, aligned to physical page boundaries (e.g., 00h–0Fh, 10h–1Fh). Writing more than 16 bytes before issuing a Stop condition causes the address pointer to roll over within the same page, overwriting earlier data-not advancing to the next page.

Is the 24LC04BHT-I/MNY AEC-Q100 qualified?

Yes, the 24LC04BHT-I/MNY is AEC-Q100 qualified for automotive applications. This qualification covers stress testing for temperature cycling, humidity, ESD, and reliability under extended temperature range (–40°C to +85°C), confirming suitability for use in automotive body control, infotainment, and ADAS subsystems.