Microchip Technology 24LC024H-I/P

Overview

24LC024H-I/P 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 targets embedded system configuration storage, sensor calibration data retention, and firmware parameter backup in industrial controllers.

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

Technical Context

The 24LC024H-I/P implements a 2-wire I²C slave interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, output slope control to suppress ground bounce, and an internal address counter supporting current-address, random, and sequential read modes. Its page write buffer holds up to 16 bytes before initiating a self-timed 5 ms write cycle.

Hardware write protection is controlled solely by the WP pin: tied to VCC, it locks addresses 80h–FFh; tied to VSS, full array access is enabled. Device addressing uses three chip-select pins (A0–A2), enabling up to eight devices on one bus with 7-bit slave address format '1010 A2 A1 A0 R/W'.

Key Specifications

Pinout & Package

24LC024H-I/P is supplied in an 8-pin Plastic Dual In-line Package (PDIP) with 0.300-inch body width, lead finish Matte Tin (Pb-free), and RoHS compliance. Pin 1 is marked with a notch or dot; orientation follows standard DIP numbering (counterclockwise from notch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024H-I/P and AT24C02C-PU, the 24LC024H-I/P uniquely combines 1 MHz I²C speed, automotive-grade temperature range, and dedicated hardware write-protect - making it optimal for high-reliability, high-throughput embedded systems where physical security and extended environmental tolerance are mandatory.

Availability

24LC024H-I/P is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical infusion devices, and smart utility meters requiring stable component supply across extended temperature and voltage ranges.

Supply support for 24LC024H-I/P 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, serving industrial, automotive, communications, and consumer markets with integrated silicon and development tools.

The 24LC024H belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power nonvolatile data storage in harsh environments where reliability, long-term data integrity, and I²C interoperability are critical.

FAQ

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

The 24LC024H-I/P supports up to 1 MHz I²C clock frequency when VCC is between 2.5V and 5.5V. This fast-mode plus capability enables faster configuration reads and firmware parameter updates compared to standard 100 kHz or 400 kHz EEPROMs. The 24LC024H-I/P datasheet specifies minimum high/low times and rise/fall times explicitly for 1 MHz operation, ensuring reliable timing margins in high-speed host systems.

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

Hardware write protection on the 24LC024H-I/P 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 access is permitted. This protection is active during power-up and persists regardless of I²C command state, providing fail-safe defense against accidental or malicious overwrites.

What package type is used for the 24LC024H-I/P?

The 24LC024H-I/P uses an 8-pin Plastic Dual In-line Package (PDIP) with 0.300-inch body width, Matte Tin (Sn) lead finish, and Pb-free/RoHS compliance. Its through-hole mounting supports prototyping, legacy board designs, and applications requiring mechanical robustness. Pinout matches industry-standard 24xx-series EEPROMs, enabling direct replacement in existing PDIP footprints.

Does the 24LC024H-I/P support page write operations?

Yes, the 24LC024H-I/P supports page write operations with a 16-byte buffer. After sending the control byte and starting address, the master may transmit up to 16 data bytes before issuing a STOP condition; the device then performs a single self-timed 5 ms write cycle. Page writes reduce I²C bus occupancy versus multiple byte writes and improve efficiency when storing contiguous configuration blocks.

What is the operating temperature range for the 24LC024H-I/P?

The 24LC024H-I/P is rated for industrial and automotive operation from –40°C to +125°C. The "I" suffix in the part number denotes Industrial grade, and the "E" variant (24LC024H-E/P) extends to Automotive grade - but the 24LC024H-I/P itself is qualified across the full –40°C to +125°C range, making it suitable for under-hood, factory-floor, and outdoor embedded applications.