Microchip Technology 24LC025T-I/MC

Overview

24LC025T-I/MC 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), 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 features Schmitt-trigger inputs for noise immunity in embedded control and sensor calibration applications.

For engineers reviewing the 24LC025T-I/MC datasheet, 24LC025T-I/MC pinout, 24LC025T-I/MC application, or 24LC025T-I/MC equivalent, key selection criteria include voltage compatibility (2.5–5.5 V), I²C timing compliance (100/400 kHz), SOT-23 package footprint, absence of hardware write-protect (WP not connected), and endurance (>1 million cycles).

Technical Context

The 24LC025T-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. It uses Schmitt-trigger inputs and input filtering (50 ns spike suppression) to ensure robust operation on noisy buses.

Its 6-pin SOT-23 package omits the A2 and WP pins-only A0 and A1 are functional for device addressing, limiting cascading to four devices per bus. The device lacks internal write protection logic, as WP is unconnected per datasheet Note and Pin Function Table.

Key Specifications

Pinout & Package

24LC025T-I/MC is housed in a RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.1 mm), optimized for space-constrained PCB layouts. Pin 1 is marked by laser indentation; pin 3 is SDA, pin 1 is SCL, and pins 4–6 are VSS, A0, A1 respectively. A2 and WP are not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA025T-I/MC and AT24C02D-SSHM-T, the 24LC025T-I/MC provides optimal cost and footprint for 2.5–5.5 V systems requiring industrial-grade reliability and proven field longevity, without needing sub-2.5 V support or SOIC packaging.

Availability

24LC025T-I/MC is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and consumer appliance designs requiring stable component supply, long-term data retention, and compact SOT-23 packaging.

Supply support for 24LC025T-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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24LC025T-I/MC belongs to Microchip's legacy 24XX02X serial EEPROM family, designed specifically for reliable, low-power nonvolatile storage in space- and power-constrained embedded systems across industrial, automotive, and consumer markets.

FAQ

What is the supply voltage range for the 24LC025T-I/MC?

The 24LC025T-I/MC operates from 2.5 V to 5.5 V DC. It is not rated for voltages below 2.5 V - attempting to power it below this threshold may result in undefined behavior or failure to acknowledge I²C commands. This distinguishes it from the 24AA025T-I/MC, which supports 1.7 V minimum.

Does the 24LC025T-I/MC have hardware write protection?

No, the 24LC025T-I/MC does not include hardware write protection. As confirmed in the datasheet Pin Descriptions section (2.4) and Device Selection Table, the WP pin is not internally connected on any 24XX025 variant. All memory locations are software-writable via standard I²C commands.

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

Up to four 24LC025T-I/MC devices can share one I²C bus. Because the SOT-23 package lacks the A2 pin, only A0 and A1 are available for chip addressing - yielding 2² = 4 unique slave addresses (1010 00 R/W through 1010 11 R/W).

What is the maximum I²C clock frequency supported by 24LC025T-I/MC?

The 24LC025T-I/MC supports up to 400 kHz I²C clock frequency when VCC is ≥2.5 V. At this rate, it meets Fast-mode I²C timing requirements including THIGH ≥600 ns and TLOW ≥1300 ns, enabling efficient page writes and reduced bus occupation time.

Is the 24LC025T-I/MC RoHS compliant and lead-free?

Yes, the 24LC025T-I/MC is Pb-free and RoHS compliant per Microchip's documentation (Features section, DS21210N-page 1). The "T" in the part number denotes tape-and-reel packaging, and the "MC" suffix indicates the SOT-23 package with matte tin (Sn) finish per JEDEC standards.