Microchip Technology 24LC014HT-E/MS

Overview

24LC014HT-E/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with half-array hardware write-protection, rated for automotive temperature range (−40°C to +125°C), 2.5V–5.5V supply, and 1 MHz clock support. It features Schmitt-trigger inputs, slope-controlled outputs, 16-byte page write buffer, and 1 million erase/write cycles - deployed in automotive body control modules for storing calibration data and configuration settings.

For engineers reviewing the 24LC014HT-E/MS datasheet, 24LC014HT-E/MS pinout, 24LC014HT-E/MS application, or 24LC014HT-E/MS equivalent, key selection criteria include its automotive-grade reliability, hardware WP pin enabling selective protection of addresses 0x40–0x7F, 1 μA standby current at VCC = 5.5V, and compatibility with standard I²C master controllers without level-shifting.

Technical Context

The 24LC014HT-E/MS implements a true two-wire I²C slave interface with fixed 7-bit address prefix '1010', three user-configurable chip-select bits (A0–A2), and R/W bit control. Its internal architecture includes an address pointer, page buffer, HV generator for EEPROM programming, and write-protect circuitry tied to the WP pin state.

It supports byte and page writes with self-timed internal erase/write cycles (max 5 ms), acknowledges only after successful address/data reception (not during active write), and uses Schmitt-trigger inputs with 50 ns spike suppression and hysteresis ≥ 0.05×VCC to ensure noise immunity on shared buses.

Key Specifications

Pinout & Package

24LC014HT-E/MS is housed in an 8-pin MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained automotive PCB layouts and reflow-compatible with lead-free assembly.

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-5TR, the 24LC014HT-E/MS delivers deterministic, zero-software-overhead protection of a defined memory region via a dedicated WP pin - critical for automotive functional safety where failure modes must be mitigated at the hardware level.

Availability

24LC014HT-E/MS is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and medical device manufacturing requiring stable component supply, long lifecycle support, and AEC-Q100-compliant traceability.

Supply support for 24LC014HT-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 family is designed specifically for automotive and industrial applications demanding extended temperature operation, high reliability, and robust I²C interface performance in electrically noisy environments.

FAQ

What is the operating temperature range of the 24LC014HT-E/MS?

The 24LC014HT-E/MS is qualified for the automotive temperature range of −40°C to +125°C, as indicated by the 'E' suffix in the part number and confirmed in the Device Selection Table. This rating applies across its full 2.5V–5.5V supply range and supports deployment in engine bay, transmission control, and other under-hood applications where thermal stability is critical. The 'T' in the part number denotes tape-and-reel packaging.

Does the 24LC014HT-E/MS support 1 MHz I²C communication?

Yes, the 24LC014HT-E/MS supports 1 MHz I²C clock frequency, as specified for the 24LC014H variant in the Device Selection Table and verified in Table 1-2 AC Characteristics. This capability requires VCC ≥ 2.5V and enables faster configuration writes compared to 400 kHz-only EEPROMs, reducing system initialization time in time-sensitive applications.

How does the hardware write-protection work on the 24LC014HT-E/MS?

The 24LC014HT-E/MS uses the WP pin to enable hardware write-protection of memory addresses 0x40–0x7F (upper half). When WP is tied to VCC, writes to this 64-byte region are blocked; writes to 0x00–0x3F remain permitted. When WP is tied to VSS, full-array writes are allowed. This protection is active regardless of I²C command sequence and cannot be overridden in software.

What package type is used for the 24LC014HT-E/MS?

The 24LC014HT-E/MS is packaged in an 8-pin MSOP (Mini Small Outline Package) with 3.0 mm × 3.0 mm body and 0.65 mm lead pitch. This compact, surface-mount package is documented in the Packaging Information section and supports automated placement and reflow soldering in high-density automotive PCB assemblies.

Can multiple 24LC014HT-E/MS devices share the same I²C bus?

Yes, up to eight 24LC014HT-E/MS devices can operate on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit chip-select codes. Each device responds only to its assigned 7-bit slave address (1010xxxR/W), enabling scalable memory expansion up to 8 Kbits without additional address decoding logic.