Microchip Technology 24LC025-I/MS

Overview

24LC025-I/MS from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C). It features 16-byte page write buffer, 400 kHz max clock speed, and 1 μA typical standby current. Used for storing configuration data in embedded controllers, sensor calibration tables, and power-management settings.

For engineers reviewing the 24LC025-I/MS datasheet, 24LC025-I/MS pinout, 24LC025-I/MS application, or 24LC025-I/MS equivalent, key selection criteria include voltage compatibility (2.5V–5.5V), absence of hardware write-protect (WP pin not connected), SOT-23-6 package footprint, and support for cascaded multi-device I²C bus configurations up to eight units.

Technical Context

The 24LC025-I/MS implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and internal slope control to suppress ground bounce. Its address decoding uses A0 and A1 pins (A2 unconnected in SOT-23), enabling up to four devices on one bus.

It supports byte and page write operations with self-timed erase/write cycles (≤5 ms), automatic address pointer incrementing, and acknowledge polling for write-cycle completion detection. No internal WP circuitry exists - write protection must be implemented externally via software or system-level access control.

Key Specifications

Pinout & Package

24LC025-I/MS is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (1.6 mm × 2.8 mm × 1.1 mm body height). Pin 1 is marked by laser indentation; 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 24LC025-I/MS, the 24AA025-I/MS extends low-voltage operation down to 1.7V while retaining identical packaging and interface behavior, whereas the AT24C02C offers cross-manufacturer redundancy with minor address configuration differences requiring firmware review.

Availability

24LC025-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and smart energy metering applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for 24LC025-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC025 belongs to Microchip's legacy 24XX02X serial EEPROM family, designed specifically for reliable, low-power nonvolatile data storage in cost-sensitive embedded systems across industrial, medical, and automotive markets.

FAQ

What is the maximum I²C clock frequency supported by the 24LC025-I/MS?

The 24LC025-I/MS supports up to 400 kHz I²C clock frequency when VCC ≥ 2.5V. At lower voltages (not applicable here, as minimum VCC is 2.5V), it defaults to 100 kHz. This allows high-speed parameter loading in time-critical boot sequences while maintaining signal integrity on standard PCB traces.

Does the 24LC025-I/MS have a hardware write-protect pin?

No, the 24LC025-I/MS does not include a functional WP pin - it is not internally connected. Write protection must be implemented in firmware or via external logic. This differs from the 24LC024-I/MS, which has an active WP pin tied to VCC/VSS for hardware-level locking of the entire memory array.

How many 24LC025-I/MS devices can be connected on a single I²C bus?

Up to four 24LC025-I/MS 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 (1010xx0), enabling compact multi-parameter storage without bus expansion.

What is the page write size and maximum write time for the 24LC025-I/MS?

The 24LC025-I/MS has a 16-byte page write buffer and guarantees ≤5 ms self-timed write cycle duration for both byte and page operations. This enables efficient firmware routines that batch configuration updates while ensuring predictable worst-case latency before next bus access.

Is the 24LC025-I/MS suitable for automotive applications?

The 24LC025-I/MS is rated for industrial temperature (–40°C to +85°C), not automotive grade (–40°C to +125°C). For automotive use, Microchip specifies the 24LC025-E/MS variant - identical functionality but qualified to AEC-Q100 Grade 3. Always verify temperature grade suffix before deployment in vehicle systems.