Microchip Technology 24LC024H-I/MS

Overview

24LC024H-I/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 and industrial temperature range (–40°C to +85°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 - deployed in embedded systems for configuration storage, calibration data retention, and firmware parameter backup.

For engineers reviewing the 24LC024H-I/MS datasheet, 24LC024H-I/MS pinout, 24LC024H-I/MS application, or 24LC024H-I/MS equivalent, key selection criteria include VCC range compatibility (2.5V–5.5V), 1 MHz I²C timing compliance, MSOP-8 package footprint, half-array hardware write protection, and endurance of 1 million erase/write cycles at 25°C.

Technical Context

The 24LC024H-I/MS implements a 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 architecture includes a 16-byte page write buffer, auto-erase logic, and voltage-threshold detection that disables write operations below 1.5V.

Schmitt-trigger inputs on SDA and SCL pins provide 0.05×VCC hysteresis and 50 ns spike suppression, while output slope control minimizes ground bounce. The device supports byte and page writes with self-timed 5 ms write cycles and acknowledges only after completion - requiring ACK polling for write-cycle status detection.

Key Specifications

Pinout & Package

24LC024H-I/MS is supplied in an 8-pin MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch) with exposed pad option not specified. Pin functions are electrically identical across SOIC, TSSOP, and MSOP variants per Microchip DS22102A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC024H-I/MS, AT24C02D-MAHM-T offers wider voltage flexibility but removes hardware-level write protection, while BR24G02FJ-WE2 adds ECC and quadruples endurance at the cost of higher unit price and SOP-J8 footprint - making 24LC024H-I/MS optimal for cost-sensitive industrial designs needing deterministic half-array locking.

Availability

24LC024H-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, automotive body control modules, smart energy meters, and embedded configuration management requiring stable component supply across extended temperature ranges.

Supply support for 24LC024H-I/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC024H belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile data storage in space-constrained embedded systems requiring I²C interface simplicity and industrial-grade robustness.

FAQ

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

The 24LC024H-I/MS supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. This fast-mode plus capability enables high-throughput configuration reads and writes in time-sensitive applications such as real-time sensor calibration. At lower voltages outside its specified range, timing margins degrade - so operation strictly within 2.5V–5.5V is required to guarantee 1 MHz compliance per DS22102A.

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

The 24LC024H-I/MS uses the WP pin to enable hardware write protection for memory addresses 80h–FFh (upper 128 bytes). When WP is tied to VCC, writes to this half-array are blocked; tying WP to VSS disables protection entirely. Unlike software locks, this is a physical gate - no firmware intervention or command sequence can override it, ensuring fail-safe retention of critical calibration or security data.

What package type does the 24LC024H-I/MS use, and what are its dimensions?

The 24LC024H-I/MS uses an 8-pin MSOP package measuring 3.0 mm × 3.0 mm with 0.65 mm lead pitch. Per Microchip DS22102A, this variant shares identical pinout and electrical behavior with SOIC and TSSOP versions - enabling drop-in replacement in space-constrained layouts where MSOP's smaller footprint reduces PCB area by ~40% versus standard SOIC.

Can the 24LC024H-I/MS operate from a 3.3V supply, and what are the implications?

Yes, the 24LC024H-I/MS operates fully within specification at 3.3V (within its 2.5V–5.5V VCC range). At 3.3V, it maintains 1 MHz I²C timing, 1 μA standby current, and full 16-byte page write functionality. Logic thresholds scale with VCC (VIH = 0.7×VCC ≈ 2.31V), ensuring clean interfacing with 3.3V microcontrollers without level shifters - simplifying design in mixed-voltage systems.

What is the endurance rating of the 24LC024H-I/MS, and how is it validated?

The 24LC024H-I/MS is rated for 1 million erase/write cycles at 25°C, as confirmed by Microchip characterization testing per DS22102A. This value is not 100% tested per unit but ensured through accelerated life testing and statistical modeling. For applications exceeding this limit, Microchip's Total Endurance™ Model provides application-specific projections based on voltage, temperature, and usage patterns.