Microchip Technology 24AA024-I/P

Overview

24AA024-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 hardware write-protection (WP pin), 400 kHz max clock speed, and industrial temperature range (–40°C to +85°C). It supports up to eight devices on one bus via A0–A2 address pins and delivers 1 μA standby current and 1 mA typical read current for low-power embedded systems.

For engineers reviewing the 24AA024-I/P datasheet, 24AA024-I/P pinout, 24AA024-I/P application, or 24AA024-I/P equivalent, this page provides verified electrical parameters, package-specific pin mapping, noise-suppressing Schmitt-trigger inputs, 16-byte page write buffer behavior, and validated alternative parts for design-in and supply continuity planning.

Technical Context

The 24AA024-I/P implements a two-wire I²C interface with open-drain SDA/SCL requiring external pull-ups, internal address pointer auto-increment for sequential reads, and cascaded addressing across up to eight devices using A0–A2. Its write-protect logic is hardware-controlled via the dedicated WP pin tied to VCC or VSS.

It features Schmitt-trigger inputs and input filtering (50 ns spike suppression) for robust operation in electrically noisy environments, plus voltage threshold detection disabling erase/write below 1.5V. Page write operations are limited to 16-byte boundaries with wraparound behavior if crossed - requiring firmware-level boundary checks.

Key Specifications

Pinout & Package

24AA024-I/P is supplied in an 8-lead PDIP (Plastic Dual In-line Package) with 0.300-inch body width, lead pitch of 0.100 inch, and through-hole mounting. Pin 1 is marked by laser dot or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024-I/P, the 24LC024-I/P offers identical packaging and interface but lacks low-voltage operation below 2.5V, while AT24C02C-PU provides voltage compatibility but removes hardware write protection - making 24AA024-I/P the only option combining 1.7V operation, WP pin, and PDIP-8 form factor.

Availability

24AA024-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24AA024-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 24AA024-I/P belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with hardware security and wide supply voltage tolerance.

FAQ

What is the maximum I²C clock frequency supported by the 24AA024-I/P?

The 24AA024-I/P supports up to 400 kHz I²C clock frequency when VCC is 1.8V or higher. At VCC between 1.7V and 1.8V, the maximum clock rate is limited to 100 kHz per AC specifications in DS21210N. This dual-speed capability ensures interoperability across both legacy and high-speed I²C systems while maintaining data integrity under low-voltage conditions.

Does the 24AA024-I/P have hardware write protection, and how is it implemented?

Yes, the 24AA024-I/P includes a dedicated hardware write-protection pin (WP). When WP is tied to VCC, the entire memory array is locked against write operations; when tied to VSS, full write access is enabled. This pin-based protection operates independently of firmware state or power sequencing, providing deterministic safeguarding against accidental or malicious overwrites - a feature absent in the 24AA025 and 24LC025 variants.

Can multiple 24AA024-I/P devices share the same I²C bus, and how many?

Yes, up to eight 24AA024-I/P devices can operate on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit slave addresses (0x50–0x57). Each device must have a distinct combination of A0–A2 logic levels (VSS or VCC), enabling contiguous 16 Kbit memory expansion without additional address decoding logic or bus arbitration overhead.

What is the page write buffer size of the 24AA024-I/P, and what happens if more than that is written?

The 24AA024-I/P has a 16-byte page write buffer. If more than 16 bytes are transmitted before the Stop condition, the address counter wraps around within the same physical page, overwriting previously loaded data in FIFO order. This behavior requires firmware to enforce page boundaries - for example, splitting a 20-byte write into one 16-byte and one 4-byte transaction - to avoid unintended data loss.

Is the 24AA024-I/P compatible with standard I²C protocol, including ACK polling?

Yes, the 24AA024-I/P fully complies with standard I²C protocol, including Start/Stop conditions, 7-bit slave addressing, and acknowledge (ACK) signaling. During internal write cycles, it suspends ACK responses - enabling reliable ACK polling by the master to detect completion without fixed delay timing, thereby optimizing bus utilization in time-critical embedded applications.