Microchip Technology 24LC04BT-I/MNY

Overview

24LC04BT-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 400 kHz max clock frequency, 1 µA standby current, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity in embedded control and sensor calibration applications.

For engineers reviewing the 24LC04BT-I/MNY datasheet, 24LC04BT-I/MNY pinout, 24LC04BT-I/MNY application, or 24LC04BT-I/MNY equivalent, key selection criteria include VCC compatibility (2.5–5.5V), I²C timing compliance at 400 kHz, WP-enabled memory protection, endurance (1M cycles), and MNY package footprint validation for space-constrained PCB layouts.

Technical Context

The 24LC04BT-I/MNY implements a two-wire I²C interface with open-drain SDA/SCL pins, internal address pointer for sequential reads, and block-select addressing using the B0 bit in the control byte. Its EEPROM array supports byte and page writes with self-timed erase/write cycles and automatic address incrementing during sequential operations.

It uses Schmitt-trigger inputs and output slope control to suppress ground bounce and bus noise, enabling reliable operation in electrically noisy environments. The device does not use A0–A2 pins-these are unconnected and may be left floating or tied to VSS/VCC without functional impact.

Key Specifications

Pinout & Package

The 24LC04BT-I/MNY is supplied in an 8-lead UDFN (Wettable Flanks) package, designated "MNY" per Microchip's packaging nomenclature. This leadless, surface-mount package measures 2 mm × 3 mm with exposed thermal pad, optimized for compact PCB layouts and automated optical inspection (AOI) via wettable flanks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC04BT-I/MNY, the 24AA04T-I/MNY extends voltage range downward at the cost of reduced clock speed below 2.5V, while the AT24C04-PU offers faster I²C but omits automotive qualification and uses a larger SOIC package - making the 24LC04BT-I/MNY optimal for space-constrained, industrial-grade 2.5V+ systems requiring guaranteed reliability.

Availability

24LC04BT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration storage, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 24LC04BT-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 devices, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The 24LC04B series belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile data storage in space- and power-constrained embedded systems.

FAQ

What is the operating voltage range for the 24LC04BT-I/MNY?

The 24LC04BT-I/MNY operates from 2.5V to 5.5V. Unlike the 24AA04 variant, it does not support voltages below 2.5V. This makes it suitable for standard 3.3V and 5V logic systems but incompatible with sub-2.5V energy-harvesting or single-cell battery applications. Operation outside this range may cause functional failure or permanent damage.

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

Yes, the 24LC04BT-I/MNY requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. For 400 kHz operation, a 2 kΩ resistor is recommended; for 100 kHz, 10 kΩ is typical. Incorrect pull-up values can cause timing violations, bus contention, or unreliable ACK detection during I²C transactions.

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

The WP (Write-Protect) pin on the 24LC04BT-I/MNY is active-high: when tied to VCC, it disables all write operations (including byte and page writes) across the entire 4-Kbit memory array, while read operations remain fully functional. When tied to VSS, full read/write access is enabled. This provides hardware-level security against accidental or malicious firmware corruption.

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

The 24LC04BT-I/MNY supports a maximum I²C clock frequency of 400 kHz under standard conditions (VCC ≥ 2.5V). It is not rated for 1 MHz operation like the 24FC04 variant. Attempting 1 MHz communication will violate AC timing parameters such as THIGH (min 600 ns) and TLOW (min 1300 ns), resulting in bus errors or failed ACK responses.

Is the 24LC04BT-I/MNY AEC-Q100 qualified?

Yes, the 24LC04BT-I/MNY is AEC-Q100 qualified for automotive applications. It meets Grade 2 temperature requirements (–40°C to +105°C ambient), though its specified industrial range is –40°C to +85°C. This qualification validates its reliability for use in body control modules, infotainment interfaces, and other automotive subsystems subject to stringent stress testing.