Microchip Technology 24AA025-I/P

Overview

24AA025-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), 400 kHz max clock frequency, and 16-byte page write buffer. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring low-power, noise-immune bus interfacing.

For engineers reviewing the 24AA025-I/P datasheet, 24AA025-I/P pinout, 24AA025-I/P application, or 24AA025-I/P equivalent, key selection criteria include its 1.7V minimum VCC, absence of hardware write-protect (WP pin unconnected), SOT-23-6 package footprint, and compatibility with I²C master controllers in space-constrained industrial sensors and IoT edge nodes.

Technical Context

The 24AA025-I/P implements a standard two-wire I²C slave interface with Schmitt-trigger inputs and output slope control for robustness on noisy PCBs. Its internal address pointer auto-increments during sequential reads and supports current-address, random, and sequential read modes.

It uses a self-timed erase/write cycle with 5 ms maximum page write time and features an on-chip 16-byte write buffer. The device lacks internal WP connection-unlike 24AA024-making all memory locations writable without external pin control.

Key Specifications

Pinout & Package

24AA025-I/P is supplied in a 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and no exposed pad. Pin 1 is laser-marked; A2 is not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC025-I/P, the 24AA025-I/P enables lower-voltage operation critical for modern ultra-low-power MCUs, while versus AT24C02D-SSHM-T, it delivers identical electrical behavior in a space-saving SOT-23-6 package ideal for compact modules.

Availability

24AA025-I/P is available at Aetrix Electronics and suitable for industrial sensor nodes, IoT edge devices, medical diagnostic modules, and automotive body control units requiring stable component supply across extended production lifecycles.

Supply support for 24AA025-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, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 24AA025-I/P belongs to Microchip's 24XX025 family of I²C EEPROMs, designed specifically for low-voltage, low-power embedded systems needing reliable nonvolatile storage in minimal PCB area.

FAQ

What is the function of the WP pin on the 24AA025-I/P?

The WP (Write-Protect) pin is not internally connected on the 24AA025-I/P. Unlike the 24AA024, this device has no hardware write protection - all 256 bytes are always writable via I²C commands. No external pull-up or pull-down is required, simplifying schematic design and reducing BOM count.

Does the 24AA025-I/P support 100 kHz and 400 kHz I²C speeds simultaneously?

Yes, the 24AA025-I/P supports both speeds: up to 400 kHz when VCC ≥1.8V, and up to 100 kHz when VCC is between 1.7V and 1.8V. The device automatically adapts to the clock frequency set by the master; no configuration register or mode setting is needed.

Can multiple 24AA025-I/P devices share the same I²C bus?

Yes - up to four 24AA025-I/P devices can operate on one I²C bus using address pins A0 and A1. Since A2 is unconnected in the SOT-23 package, only two bits are used for device addressing (1010A1A00), yielding four unique 7-bit slave addresses (0xA0, 0xA2, 0xA4, 0xA6).

What is the maximum write time for a full 16-byte page on the 24AA025-I/P?

The maximum write time for any page (1–16 bytes) on the 24AA025-I/P is 5 ms, as specified in the datasheet. This self-timed cycle begins after the master issues a STOP condition and cannot be interrupted - software must poll the ACK bit or wait the full duration before initiating the next command.

Is the 24AA025-I/P RoHS compliant and lead-free?

Yes, the 24AA025-I/P is Pb-free and RoHS compliant per Microchip's DS21210N documentation. The SOT-23 package uses matte tin (Sn) plating per JEDEC standards, and marking includes "Pb-free" designation on reel labels when space constraints prevent direct package marking.