Microchip Technology 24LC014H-E/MS

Overview

24LC014H-E/MS from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 2.5V to 5.5V with 1 MHz clock support and automotive-grade temperature range (–40°C to +125°C). It features hardware write-protection for half-array (40h–7Fh), 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity - deployed in vehicle infotainment configuration storage and engine control module parameter retention.

For engineers reviewing the 24LC014H-E/MS datasheet, 24LC014H-E/MS pinout, 24LC014H-E/MS application, or 24LC014H-E/MS equivalent, key selection considerations include VCC min/max compatibility, WP pin behavior under automotive thermal stress, I²C timing compliance at 1 MHz, and MSOP-8 package footprint constraints in space-constrained ECU designs.

Technical Context

The 24LC014H-E/MS implements a standard I²C slave interface with fixed 7-bit address prefix '1010' and three user-configurable chip select bits (A0–A2), enabling up to eight devices on one bus. Its internal architecture includes an auto-incrementing address pointer, on-chip page buffer, and HV generator for EEPROM erase/write cycles.

Write protection is implemented via dedicated WP pin logic: tied to VCC, it disables writes to addresses 40h–7Fh; tied to VSS, full array access is permitted. The device uses Schmitt-trigger inputs and output slope control to suppress ground bounce and tolerate >4 kV ESD - critical for automotive CAN-domain peripheral interfacing.

Key Specifications

Pinout & Package

24LC014H-E/MS is supplied in an 8-pin MSOP package (3.0 mm × 3.0 mm × 1.0 mm body, 0.65 mm pitch), optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01C-SSHM-T and BR24G01NUX-3GE2, the 24LC014H-E/MS provides deterministic, pin-level hardware write protection for half the array - eliminating firmware dependency and timing uncertainty in safety-critical automotive EEPROM use cases.

Availability

24LC014H-E/MS is available at Aetrix Electronics and suitable for automotive ECU design, ADAS calibration storage, and infotainment system configuration management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24LC014H-E/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC014H-E/MS belongs to Microchip's automotive-qualified serial EEPROM product line, engineered specifically for robust, low-power nonvolatile data storage in harsh-temperature vehicle subsystems.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24LC014H-E/MS?

The 24LC014H-E/MS requires a minimum VCC of 2.5V for guaranteed operation across its full automotive temperature range (–40°C to +125°C). Below 2.5V, functionality is not assured - unlike the 24AA014H variant, which supports down to 1.7V. This 2.5V floor ensures stable internal voltage regulation and write-cycle completion under transient battery conditions in vehicle systems.

How does the WP pin function on the 24LC014H-E/MS, and what memory region does it protect?

On the 24LC014H-E/MS, the WP pin is a hardware write-protect input: when tied to VCC, it permanently disables writes to memory addresses 40h through 7Fh (64 bytes, upper half of the 128-byte array); when tied to VSS, full array access is enabled. This physical protection mechanism operates independently of I²C commands and remains active even during power transitions - a key safety feature for calibration data integrity.

Can the 24LC014H-E/MS operate at 1 MHz across its entire temperature range?

Yes, the 24LC014H-E/MS supports 1 MHz I²C clock frequency across its full automotive temperature range (–40°C to +125°C) and VCC range (2.5V to 5.5V). This is explicitly specified in Table 1-2 of the DS22077B datasheet, distinguishing it from the 24AA014H, which is limited to 400 kHz above 1.8V. The 1 MHz capability enables faster configuration loads in time-sensitive ECU boot sequences.

What package type does the 24LC014H-E/MS use, and what are its key mechanical dimensions?

The 24LC014H-E/MS uses an 8-pin MSOP package (Micro Small Outline Package) with 0.65 mm lead pitch, 3.0 mm × 3.0 mm body size, and 1.0 mm maximum height. Its compact footprint and exposed pad-free construction make it suitable for high-density automotive PCBs where thermal dissipation is managed via copper pour rather than package-level heatsinking.

How many devices can share the same I²C bus with the 24LC014H-E/MS, and how is addressing managed?

Up to eight 24LC014H-E/MS devices can share a single I²C bus using the three hardware address pins A0, A1, and A2. These pins form the three least-significant bits of the 7-bit slave address (prefix '1010'), yielding addresses 1010000 to 1010111. Each device must have a unique A0–A2 combination - typically hardwired to VSS or VCC - enabling contiguous 8 Kbit memory expansion without software address translation.