Microchip Technology 24LC024H-E/MS

Overview

24LC024H-E/MS from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with 1 MHz clock support in industrial and automotive temperature ranges (–40°C to +125°C). It features hardware write protection for the upper half-array (80h–FFh), 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity-used for secure parameter storage in automotive body control modules.

For engineers reviewing the 24LC024H-E/MS datasheet, 24LC024H-E/MS pinout, 24LC024H-E/MS application, or 24LC024H-E/MS equivalent, key selection criteria include VCC range compatibility (2.5V–5.5V), 1 MHz I²C timing compliance, MSOP-8 package footprint, and hardware-based half-array write protection for firmware-critical configuration data.

Technical Context

The 24LC024H-E/MS implements a standard two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three programmable chip-select bits (A0–A2), enabling up to eight devices on one bus. Its internal address pointer auto-increments during sequential reads and wraps from FFh to 00h.

Write operations use an on-chip 16-byte page buffer with self-timed erase/write cycles (max 5 ms), while hardware write protection is controlled solely by the WP pin state-tied to VCC to lock addresses 80h–FFh, independent of software commands.

Key Specifications

Pinout & Package

24LC024H-E/MS is housed in an 8-pin MSOP package (3.0 mm × 3.0 mm × 1.0 mm body, 0.65 mm pitch), optimized for high-density PCB layouts in automotive and industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC024H-E/MS, the 24LC024H-I/MS trades automotive qualification and 1 MHz speed for lower cost in benign environments, while AT24C02D-MAHM-T replaces hardware WP with software-controlled locking-increasing firmware complexity but offering finer-grained protection granularity.

Availability

24LC024H-E/MS is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor calibration, medical infusion pump configuration, and smart energy meter firmware parameter storage requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for 24LC024H-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC024H-E/MS belongs to Microchip's serial EEPROM product line, engineered specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and hardware-enforced data integrity.

FAQ

What is the maximum I²C clock frequency supported by the 24LC024H-E/MS?

The 24LC024H-E/MS supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. This is specified in the AC Characteristics table (Param. No. 1, FCLK) of the DS22102A datasheet and distinguishes it from the 24AA024H variant, which is limited to 400 kHz above 1.8V. The 24LC024H-E/MS achieves this higher speed while maintaining full compatibility with standard I²C protocol timing requirements.

How does hardware write protection work on the 24LC024H-E/MS?

Hardware write protection on the 24LC024H-E/MS is controlled exclusively by the WP pin: when tied to VCC, writes to memory addresses 80h–FFh (upper 128 bytes) are blocked regardless of software commands. The 24LC024H-E/MS will acknowledge the write attempt but discard the data-no software override or register setting can disable this function. This behavior is confirmed in Section 2.4 and Figure 6-2 of the DS22102A datasheet.

What package type is used for the 24LC024H-E/MS?

The 24LC024H-E/MS uses an 8-pin MSOP package (Micro Small Outline Package), with dimensions 3.0 mm × 3.0 mm × 1.0 mm and 0.65 mm lead pitch. This is explicitly listed in the Device Selection Table and Package Types section of DS22102A, and confirmed by the "MS" suffix in the part number and the MSOP-specific pin diagram on page 2 of the datasheet.

Does the 24LC024H-E/MS support multi-device addressing on a single I²C bus?

Yes, the 24LC024H-E/MS supports up to eight devices on one I²C bus using its three hardware address pins (A0, A1, A2). Each pin must be hard-wired to VSS or VCC to set a unique 3-bit chip select code, forming the three most significant bits of the 7-bit slave address (prefix '1010' + A2A1A0). This capability is documented in Section 2.3 and Figure 5-1 of the DS22102A datasheet.

What is the guaranteed data retention period for the 24LC024H-E/MS?

The 24LC024H-E/MS guarantees data retention exceeding 200 years at 25°C, as stated in the Features list and Electrical Characteristics summary on page 1 of DS22102A. This specification applies to data written under rated conditions (VCC = 5.5V, TA = 25°C) and is derived from accelerated life testing-not extrapolated or estimated. Endurance is separately rated at 1 million write cycles.