Microchip Technology 24LC025T-E/MS

Overview

24LC025T-E/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 and automotive temperature support (–40°C to +125°C), 400 kHz max clock, 16-byte page write buffer, and no internal WP pin connection. It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs.

For engineers reviewing the 24LC025T-E/MS datasheet, 24LC025T-E/MS pinout, 24LC025T-E/MS application, or 24LC025T-E/MS equivalent, key selection criteria include its SOT-23-6 package, absence of hardware write-protection, automotive-grade reliability, and compatibility with standard I²C bus timing at 400 kHz under VCC ≥ 2.5V.

Technical Context

The 24LC025T-E/MS implements a two-wire I²C slave interface with Schmitt-trigger inputs and noise-filtered SDA/SCL pins, supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation depending on VCC level. Its address decoding uses A0 and A1 pins only - A2 is unconnected in the SOT-23 package - enabling up to four devices per bus.

Internally, it features a self-timed erase/write cycle with 5 ms maximum page write time, 16-byte page buffer, and automatic address pointer increment during sequential reads. The device includes VCC threshold detection that disables write logic below 1.5V and supports acknowledge polling to monitor write completion without fixed delay timing.

Key Specifications

Pinout & Package

24LC025T-E/MS 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 3 is SDA, pin 1 is SCL, and pin 2 is VSS - critical for compact PCB layout in wearables and automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC025-I/MS, the 24LC025T-E/MS adds automotive qualification and identical SOT-23-6 packaging, while AT24C02-SSHM-T trades compactness for broader VCC support and write-protection flexibility - making 24LC025T-E/MS optimal for space-constrained, high-reliability automotive edge nodes.

Availability

24LC025T-E/MS is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLCs, and medical diagnostics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24LC025T-E/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 24LC025T-E/MS belongs to Microchip's legacy 24LCxx serial EEPROM family, designed specifically for robust, low-power nonvolatile storage in automotive, industrial, and medical applications where reliability and small form factor are critical.

FAQ

What is the maximum I²C clock frequency supported by the 24LC025T-E/MS?

The 24LC025T-E/MS supports up to 400 kHz I²C clock frequency when VCC is ≥1.8V. At VCC < 1.8V, operation is limited to 100 kHz. This dual-speed capability ensures compatibility with both legacy 100 kHz buses and modern high-throughput systems - and the 24LC025T-E/MS datasheet specifies timing parameters for both modes under industrial and automotive temperature conditions.

Does the 24LC025T-E/MS have a hardware write-protect (WP) pin?

No, the 24LC025T-E/MS does not include a WP pin - it is internally unconnected, as confirmed in the Microchip DS21210N datasheet Section 2.4. Unlike the 24LC024 variant, this part relies solely on software-level write enable/disable commands, simplifying PCB layout and eliminating external pull-up/pull-down components. All memory locations remain writable in the 24LC025T-E/MS.

What package type is used for the 24LC025T-E/MS?

The 24LC025T-E/MS uses a 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), as specified in the Microchip DS21210N datasheet Section 9.1 and Package Drawing #C04-037. This compact, surface-mount package supports automated assembly and is ideal for space-constrained applications such as automotive body controllers and portable medical devices - and the 24LC025T-E/MS marking includes "HMNN" suffix denoting automotive temperature grade in SOT-23 format.

How many devices can be connected on the same I²C bus using the 24LC025T-E/MS?

Up to four 24LC025T-E/MS devices can share a single I²C bus, because the SOT-23 package lacks the A2 address pin - only A0 and A1 are functional. These two pins configure the two least-significant bits of the 7-bit slave address (1010A1A0), yielding four unique addresses: 101000, 101001, 101010, and 101011. This limitation is explicitly documented in DS21210N Section 5.1 for SOT-23 variants - and applies strictly to the 24LC025T-E/MS.

What is the write endurance and data retention specification for the 24LC025T-E/MS?

The 24LC025T-E/MS is rated for more than 1 million erase/write cycles and greater than 200 years of data retention at 25°C, as stated in the DS21210N datasheet Features section and verified through characterization testing. These values hold across its full automotive temperature range (–40°C to +125°C), with retention degrading predictably at elevated temperatures per Microchip's Total Endurance™ Model - and the 24LC025T-E/MS meets AEC-Q100 reliability requirements for automotive EEPROM applications.