Microchip Technology 24AA025T-I/MC

Overview

24AA025T-I/MC 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 24AA025T-I/MC datasheet, 24AA025T-I/MC pinout, 24AA025T-I/MC application, or 24AA025T-I/MC equivalent, key selection considerations include its SOT-23-6 package, absence of hardware write-protect (WP), Schmitt-triggered I²C inputs, 1 μA standby current, and support for up to four devices on a single bus via A0/A1 address pins.

Technical Context

The 24AA025T-I/MC implements a standard two-wire I²C slave interface with open-drain SDA/SCL, internal address pointer auto-increment, and self-timed erase/write cycles. Its memory array is accessed via 7-bit slave address (1010xxx0/1) with A0 and A1 pins selecting among four possible device addresses - A2 is unconnected in the SOT-23 package.

It features Schmitt-trigger inputs and input filtering (50 ns spike suppression) for robust operation on noisy PCBs, plus slope-controlled outputs to minimize ground bounce. The device lacks internal WP functionality (pin not connected), distinguishing it from 24AA024 variants, and supports both byte and page write modes with ≤5 ms write cycle time.

Key Specifications

Pinout & Package

24AA025T-I/MC is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm). Pin 1 is marked by laser dot; pin numbering follows standard SOT-23 orientation (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA025-I/MC, the 24AA025T-I/MC saves 60% board area in SOT-23 while maintaining identical memory architecture and endurance; versus AT24C02D-SSHM-T, it trades higher speed and software protection for proven Microchip compatibility and simpler initialization sequence.

Availability

24AA025T-I/MC is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, smart home gateways, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for 24AA025T-I/MC 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 design and manufacturing operations.

The 24AA025T-I/MC belongs to Microchip's 24XX025 family of low-voltage serial EEPROMs, designed specifically for space- and power-constrained embedded systems needing reliable, noise-immune nonvolatile storage.

FAQ

What is the maximum I²C clock frequency supported by the 24AA025T-I/MC?

The 24AA025T-I/MC supports up to 400 kHz I²C clock frequency when VCC ≥ 1.8V. At VCC < 1.8V, maximum clock rate drops to 100 kHz per Microchip DS21210N specification. This dual-speed capability ensures interoperability across diverse voltage domains while maintaining timing compliance.

Does the 24AA025T-I/MC have a hardware write-protect (WP) pin?

No, the 24AA025T-I/MC does not include a hardware write-protect pin. The WP terminal is not internally connected in this variant, unlike the 24AA024 series. Write protection must be implemented at the system level via software control or external logic, as confirmed in the DS21210N datasheet Section 2.4.

How many 24AA025T-I/MC devices can be connected on the same I²C bus?

Up to four 24AA025T-I/MC devices can share one I²C bus, using combinations of A0 and A1 address pins (A2 is unconnected in SOT-23). Each device responds to a unique 7-bit slave address derived from '1010' + A1 + A0 + R/W bit, enabling scalable configuration storage without bus contention.

What is the page write buffer size of the 24AA025T-I/MC?

The 24AA025T-I/MC has a 16-byte page write buffer. When performing a page write, the host MCU can transmit up to 16 sequential bytes after the word address before issuing a STOP condition; the device then writes all buffered data in a single self-timed cycle of ≤5 ms.

Is the 24AA025T-I/MC compatible with 1.8V microcontrollers?

Yes, the 24AA025T-I/MC operates down to 1.7V and is fully compatible with 1.8V I/O systems. Its Schmitt-trigger inputs and 0.3×VCC/0.7×VCC logic thresholds ensure reliable signal recognition, and its 1 μA standby current aligns with ultra-low-power MCU sleep modes.