Microchip Technology 24AA025T-I/MS

Overview

24AA025T-I/MS 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, and 16-byte page write buffer. It supports up to eight devices on one bus via A0–A2 address pins and is used for storing calibration data, configuration settings, and device identifiers in embedded control systems.

For engineers reviewing the 24AA025T-I/MS datasheet, 24AA025T-I/MS pinout, 24AA025T-I/MS application, or 24AA025T-I/MS equivalent, key selection criteria include its 1.7V low-voltage operation, hardware write-protection absence (distinguishing it from 24AA024), SOT-23-compatible MSOP-8 package, Schmitt-trigger noise immunity, and 1 million endurance cycles with >200-year data retention.

Technical Context

The 24AA025T-I/MS implements a standard two-wire I²C interface with open-drain SDA/SCL requiring external pull-ups, and uses internal address pointer auto-increment for sequential reads. Its memory array is accessed via 7-bit slave address (1010xxx) with three chip-select bits (A2/A1/A0), enabling multi-device bus topology without arbitration logic.

It features Schmitt-trigger inputs and input filter spike suppression (50 ns), eliminating external noise filtering components. Write operations are self-timed with 5 ms maximum cycle time, and acknowledge polling is supported to detect write completion-no busy flag register is required.

Key Specifications

Pinout & Package

24AA025T-I/MS is housed in an 8-pin MSOP (Mini Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option per Microchip drawing 4L24I. Pin 1 is laser-marked; package is Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024T-I/MS, the 24AA025T-I/MS removes WP functionality to simplify routing and eliminate external pull-up/down components; compared with AT24C02D-SSHM-T, it offers identical electrical specs but in a smaller MSOP-8 package with Microchip's extended industrial qualification and support ecosystem.

Availability

24AA025T-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter configuration, and PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for 24AA025T-I/MS 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, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24AA025T-I/MS belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained industrial and automotive applications.

FAQ

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

The 24AA025T-I/MS supports up to 400 kHz I²C clock frequency when VCC ≥ 1.8V. At VCC < 1.8V, maximum clock rate drops to 100 kHz per DS21210N specification. This dual-speed capability ensures interoperability across 1.8V, 3.3V, and 5V host systems without protocol modification. The 24AA025T-I/MS does not require external clock dividers or speed negotiation logic.

Does the 24AA025T-I/MS have hardware write protection?

No, the 24AA025T-I/MS does not implement hardware write protection. The WP pin is not internally connected - unlike the 24AA024T-I/MS, which uses WP to disable writes when pulled high. All 256 bytes of memory in the 24AA025T-I/MS are fully writable at all times, simplifying system design where dynamic configuration updates are routine.

What package type is used for the 24AA025T-I/MS?

The 24AA025T-I/MS is supplied in an 8-pin MSOP (Mini Small Outline Package) with 0.65 mm lead pitch, 3.0 mm × 3.0 mm body, and thermal pad option. This package is distinct from the 6-pin SOT-23 variant (24AA025T-I/OT) and offers higher pin count for full A0–A2 addressing while maintaining compact footprint for dense PCB layouts.

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

Up to eight 24AA025T-I/MS devices can be connected on a single I²C bus using unique combinations of A0, A1, and A2 address pins. Each device responds only to its assigned 7-bit slave address (1010xxx), enabling contiguous 16 Kbit expansion without additional address decoding logic. The 24AA025T-I/MS does not require external address multiplexers or software arbitration.

What is the write endurance and data retention specification for the 24AA025T-I/MS?

The 24AA025T-I/MS guarantees 1 million erase/write cycles and greater than 200 years of data retention at +25°C, as characterized per Microchip DS21210N. These values are validated under nominal conditions (VCC = 5.5V, TA = 25°C) and remain applicable across the full industrial temperature range (–40°C to +85°C) with derating per JEDEC standards. The 24AA025T-I/MS meets long-life deployment requirements for industrial and medical equipment.