Microchip Technology 24LC025T-I/MNY

Overview

24LC025T-I/MNY 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 calibration data, configuration settings, and device identifiers in embedded control modules.

For engineers reviewing the 24LC025T-I/MNY datasheet, 24LC025T-I/MNY pinout, 24LC025T-I/MNY application, or 24LC025T-I/MNY equivalent, key selection considerations include voltage compatibility (2.5–5.5 V), SOT-23 package constraints (no WP pin, A2 not connected), and page-write timing (≤5 ms) in space-constrained industrial sensor nodes and portable electronics.

Technical Context

The 24LC025T-I/MNY implements a standard two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups. Its internal address pointer auto-increments during sequential reads and supports random, current-address, and sequential read modes. Schmitt-trigger inputs and input filtering suppress noise on noisy industrial buses.

It uses low-power CMOS technology with self-timed erase/write cycles and built-in VCC threshold detection (disables writes below ~1.5 V). Unlike 24LC024, it lacks hardware write-protection (WP pin unconnected), and unlike SOIC/TSSOP variants, its SOT-23 package omits A2 and WP pins-limiting cascading to four devices per bus.

Key Specifications

Pinout & Package

24LC025T-I/MNY 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 laser-marked; 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 24LC025T-I/MNY, the SOIC-8 24LC025-I/SN offers pin-compatible expandability but larger size, while the AT24C02D-SSHM-T adds software write protection at the cost of higher standby current and non-drop-in firmware changes.

Availability

24LC025T-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and consumer electronics ID storage requiring stable component supply across extended production lifecycles.

Supply support for 24LC025T-I/MNY 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.

The 24LCxx family delivers cost-optimized, low-power serial EEPROMs targeting space- and power-constrained embedded systems where reliability and long-term data integrity are essential.

FAQ

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

The 24LC025T-I/MNY supports up to 400 kHz I²C clock frequency when VCC is ≥1.8 V. At VCC < 1.8 V, maximum clock rate drops to 100 kHz. This dual-speed capability ensures interoperability with both legacy and high-speed I²C masters while maintaining robustness at lower voltages. The 24LC025T-I/MNY does not require external clock conditioning - its internal timing meets I²C specification hold/setup margins across the full operating range.

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

No, the 24LC025T-I/MNY does not implement hardware write protection. The WP pin is not internally connected, as confirmed in the Microchip DS21210N datasheet Section 2.4. Unlike the 24LC024 variant, this device relies solely on software-level access control or system-level locking mechanisms. All 256 bytes of memory remain writable at all times when VCC is within specification, making the 24LC025T-I/MNY appropriate for applications requiring frequent reconfiguration.

How many 24LC025T-I/MNY devices can be connected on a single I²C bus?

Up to four 24LC025T-I/MNY devices can share one I²C bus. This limitation arises because the SOT-23 package lacks the A2 address pin - only A0 and A1 are functional, yielding 2² = 4 unique slave addresses (1010000, 1010001, 1010010, 1010011). Attempting to connect more than four will cause address collisions. For eight-device support, use the SOIC-8 variant (e.g., 24LC025-I/SN) which includes A2.

What is the page write capability of the 24LC025T-I/MNY?

The 24LC025T-I/MNY features a 16-byte page write buffer, allowing up to 16 contiguous bytes to be written in a single I²C transaction. Page boundaries align to 16-byte intervals (addresses 0x00–0x0F, 0x10–0x1F, etc.). Writing across a boundary causes wraparound within the same page - software must enforce alignment. This capability reduces bus traffic by up to 94% compared to individual byte writes, directly improving system responsiveness in configuration-heavy applications using the 24LC025T-I/MNY.

Is the 24LC025T-I/MNY suitable for automotive applications?

The 24LC025T-I/MNY is rated for industrial temperature range (−40°C to +85°C), not the extended automotive grade (−40°C to +125°C). While it may function in some cabin-mounted modules, Microchip specifies the 24LC025-E/MNY variant for under-hood or high-temperature automotive use. Using the 24LC025T-I/MNY in automotive contexts requires thorough thermal validation and carries no manufacturer warranty for E-grade operation. For certified automotive deployment, select the E-temp qualified version instead of the 24LC025T-I/MNY.