Microchip Technology 24LC024H-I/SN

Overview

24LC024H-I/SN 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, 1 μA standby current, and hardware write protection for the upper half-array (80h–FFh). It serves as nonvolatile configuration storage in industrial microcontroller systems requiring low-power, noise-immune bus interfacing.

For engineers reviewing the 24LC024H-I/SN datasheet, 24LC024H-I/SN pinout, 24LC024H-I/SN application, or 24LC024H-I/SN equivalent, key selection criteria include VCC range (2.5–5.5V), 1 MHz I²C timing compliance, 8-pin SOIC package footprint, half-array hardware write protection, and automotive-grade temperature operation (–40°C to +125°C).

Technical Context

The 24LC024H-I/SN implements a two-wire I²C interface with Schmitt-trigger inputs and output slope control to suppress ground bounce and noise spikes. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes without host-side buffering.

Hardware write protection is controlled solely by the WP pin state-tied to VCC to lock addresses 80h–FFh, or to VSS to enable full-array writes. The device uses an internal high-voltage generator and auto-erase logic to complete self-timed byte/page write cycles within 5 ms, independent of host timing.

Key Specifications

Pinout & Package

24LC024H-I/SN is supplied in an 8-pin SOIC (150 mil) package, pin-compatible with PDIP, TSSOP, MSOP, and TDFN variants. All packages share identical pin functions and electrical behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T, 24LC024H-I/SN delivers higher speed and automotive qualification; compared with BR24G02FJ-WE2, it offers identical performance but with Microchip's long-term supply assurance and established qualification history in industrial control.

Availability

24LC024H-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware parameters requiring stable component supply across multi-year production cycles.

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

The 24LC024H belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile storage in automotive, industrial, and medical applications demanding extended temperature operation and long data retention.

FAQ

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

The 24LC024H-I/SN supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. This is explicitly specified in the Device Selection Table and confirmed in AC Characteristics Table 1-2. At lower voltages (<2.5V), the device is not rated for 1 MHz operation - only the 24AA024H variant supports 400 kHz down to 1.7V. The 24LC024H-I/SN's 1 MHz capability enables faster configuration loading in time-sensitive embedded systems.

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

Hardware write protection on the 24LC024H-I/SN is controlled exclusively by the WP pin: when tied to VCC, writes to memory addresses 80h–FFh (upper 128 bytes) are blocked, while addresses 00h–7Fh remain writable; when WP is tied to VSS, full-array writes are permitted. This protection is implemented in silicon and cannot be overridden by software commands. The 24LC024H-I/SN does not support software write protection - only this single-pin hardware mechanism.

What package type is used for the 24LC024H-I/SN part number suffix "/SN"?

Per Microchip's packaging nomenclature in DS22102A-page 14, the "/SN" suffix denotes the 8-pin SOIC (Small Outline Integrated Circuit) package with 150 mil body width. This matches the mechanical drawings on pages 15–19 and is electrically and functionally identical to the PDIP, TSSOP, MSOP, and TDFN variants - differing only in physical form factor and thermal characteristics. The /SN variant is optimized for automated PCB assembly and space-constrained industrial layouts.

Does the 24LC024H-I/SN support page write operations, and what is the buffer size?

Yes, the 24LC024H-I/SN supports page write operations with a 16-byte page buffer, as stated in the Features list and detailed in Section 6.2. A single I²C transaction can load up to 16 bytes into the buffer before initiating the internal write cycle. Page boundaries align to 16-byte intervals (e.g., 00h–0Fh, 10h–1Fh), and crossing a boundary causes wraparound within the same page - requiring firmware to manage alignment. This reduces I²C bus overhead versus byte-by-byte writes.

What is the guaranteed data retention period for the 24LC024H-I/SN at operating temperature?

The 24LC024H-I/SN guarantees >200 years of data retention at 25°C ambient, as specified in the Features section and confirmed in the Product Summary. This value is derived from accelerated life testing and applies across the full rated temperature range (–40°C to +125°C), though retention decreases logarithmically at elevated temperatures. Microchip's Total Endurance™ Model provides application-specific estimates, but the 200-year figure represents the minimum retention under nominal conditions - critical for infrastructure and medical equipment with long service lifetimes.