Microchip Technology 24LC04BT-E/MNY

Overview

24LC04BT-E/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 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin - used for nonvolatile parameter storage in industrial control modules.

For engineers reviewing the 24LC04BT-E/MNY datasheet, 24LC04BT-E/MNY pinout, 24LC04BT-E/MNY application, or 24LC04BT-E/MNY equivalent, this page delivers verified electrical specs, package mapping to 8-lead UDFN (MNY), I²C timing compliance, endurance (1M cycles), and real-world use context for embedded system design.

Technical Context

The 24LC04BT-E/MNY implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. It supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C protocols with ACK polling and page-write buffering up to 16 bytes per cycle.

Its memory architecture uses an internal Address Pointer that auto-increments during sequential reads and wraps within 256-word blocks. Write protection is implemented via a dedicated WP pin tied to VCC, disabling all write operations while preserving read functionality across temperature ranges.

Key Specifications

Pinout & Package

24LC04BT-E/MNY is packaged in an 8-lead UDFN (Wettable Flanks) with 2 mm × 3 mm footprint and exposed pad - optimized for automated optical inspection and thermal performance in space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC04BT-E/MNY, the 24AA04T-I/MNY offers wider voltage range but lacks extended temperature capability, while the AT24C04-SSHM-T provides SOIC-8 compatibility at the expense of automotive qualification and thermal robustness.

Availability

24LC04BT-E/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware parameters requiring stable component supply across extended temperature ranges.

Supply support for 24LC04BT-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.

The 24LC04B product line delivers low-voltage, high-reliability serial EEPROMs designed for nonvolatile data storage in automotive, industrial, and medical systems requiring AEC-Q100 qualification and extended temperature operation.

FAQ

What is the maximum I²C clock frequency supported by the 24LC04BT-E/MNY?

The 24LC04BT-E/MNY supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At lower voltages, it defaults to 100 kHz mode per I²C specification. This dual-speed capability ensures compatibility with both legacy and modern microcontroller I²C peripherals without external clock dividers. The 24LC04BT-E/MNY does not support 1 MHz operation - that feature is exclusive to the 24FC04 variant.

Does the 24LC04BT-E/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC04BT-E/MNY requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz. The 24LC04BT-E/MNY itself contains no internal pull-ups, so omission will result in bus failure. Pull-up voltage must match the host controller's logic level (e.g., 3.3V or 5V).

How does the WP pin function on the 24LC04BT-E/MNY?

The WP (Write-Protect) pin on the 24LC04BT-E/MNY disables all write operations - including byte and page writes - when held high (tied to VCC). Reads remain fully functional. This hardware-level protection prevents accidental or malicious overwrites of critical data such as calibration constants or security keys. The 24LC04BT-E/MNY does not support partial block protection; the entire 4-Kbit array is locked/unlocked globally.

What package type does the 24LC04BT-E/MNY use, and what are its key mechanical features?

The 24LC04BT-E/MNY uses an 8-lead UDFN (Ultra Thin Dual Flat No-lead) package with wettable flanks, designated "MNY" in Microchip's packaging nomenclature. Its 2 mm × 3 mm footprint and 0.5 mm pitch enable high-density PCB layouts. The exposed thermal pad improves heat dissipation and supports automated optical inspection (AOI) during SMT assembly.

Is the 24LC04BT-E/MNY AEC-Q100 qualified, and for which stress grades?

Yes, the 24LC04BT-E/MNY is AEC-Q100 qualified for Grade 1 (−40°C to +125°C), meeting automotive reliability requirements for powertrain, chassis, and body electronics. This qualification covers accelerated stress tests including HTOL, TCT, and ESD. The "E" suffix in the part number explicitly denotes Extended temperature grade, distinguishing it from industrial-grade variants like 24LC04BT-I/MNY.