Microchip Technology 24AA024H-I/P

Overview

24AA024H-I/P from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 1.7V to 5.5V with 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. It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.

For engineers reviewing the 24AA024H-I/P datasheet, 24AA024H-I/P pinout, 24AA024H-I/P application, or 24AA024H-I/P equivalent, this page delivers verified electrical specs, I²C timing compliance (100/400 kHz), endurance (1 million cycles), data retention (>200 years), and package-specific pin mapping for PDIP-8.

Technical Context

The 24AA024H-I/P 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 supports current-address, random, and sequential read modes.

Write operations include byte-write and page-write (up to 16 bytes per cycle), with self-timed internal erase/write and acknowledge polling support. Hardware write protection is controlled solely by the WP pin state-tied to VCC to lock addresses 80h–FFh, or to VSS to disable protection.

Key Specifications

Pinout & Package

24AA024H-I/P is supplied in 8-pin PDIP (Plastic Dual In-line Package) with 300-mil body width. Pin 1 is A0; pin 4 is VSS; pin 5 is SDA; pin 6 is SCL; pin 7 is WP; pin 8 is VCC. All packages share identical pin numbering and function mapping per Microchip DS22102A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024H-I/P, the 24LC024H-I/P offers higher speed at the cost of minimum voltage headroom, while the AT24C02-PU sacrifices robustness (no WP, lower noise immunity) for broad second-source availability - making 24AA024H-I/P optimal for low-voltage, safety-critical, or noise-prone deployments.

Availability

24AA024H-I/P is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration backup, and medical device serial number registry requiring stable component supply across extended product lifecycles.

Supply support for 24AA024H-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.

The 24AA024H belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in space-constrained industrial, medical, and automotive applications.

FAQ

What is the minimum operating voltage for the 24AA024H-I/P?

The 24AA024H-I/P operates down to 1.7V, enabling direct integration with 1.8V microcontrollers and ultra-low-power systems. Below 1.7V, the internal voltage detector disables write operations to prevent corruption, and the device enters a safe standby state with leakage current under 1 μA.

How does hardware write protection work on the 24AA024H-I/P?

On the 24AA024H-I/P, tying the WP pin to VCC enables hardware write protection for memory addresses 80h–FFh (upper 128 bytes), while leaving the lower 128 bytes (00h–7Fh) writable. When WP is tied to VSS, full array access is permitted. This protection is active regardless of I²C command - no software override exists.

Can multiple 24AA024H-I/P devices share the same I²C bus?

Yes - the 24AA024H-I/P supports up to eight devices on one I²C bus using its three hardware address pins (A0, A1, A2). Each device is assigned a unique 3-bit chip select code, resulting in distinct 7-bit slave addresses (1010xxx). No external address decoding logic is required.

What is the maximum I²C clock frequency supported by the 24AA024H-I/P?

The 24AA024H-I/P supports up to 400 kHz I²C clock frequency when VCC is 1.8V or higher. At VCC < 1.8V, maximum clock rate drops to 100 kHz to ensure timing margin. This dual-speed capability allows flexible deployment across both legacy and modern low-voltage platforms.

Does the 24AA024H-I/P require external pull-up resistors on SDA and SCL lines?

Yes - the 24AA024H-I/P uses open-drain SDA and SCL outputs, mandating external pull-up resistors. Recommended values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, connected to the same VCC rail powering the device. Incorrect pull-up strength causes timing violations or bus lockup.