Microchip Technology 24LC014-I/ST

Overview

24LC014-I/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with hardware write protection, organized as a single memory block and operating from 2.5V to 5.5V. It supports 400 kHz clock rate at V_CC ≥ 2.5V, delivers 1 mA typical active current and 1 µA typical standby current, and features a 16-byte page write buffer. It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.

For engineers reviewing the 24LC014-I/ST datasheet, 24LC014-I/ST pinout, 24LC014-I/ST application, or 24LC014-I/ST equivalent, this page provides verified electrical parameters, package-specific pin mapping (SOIC-8), endurance (1 million cycles), data retention (>200 years), and validated alternative parts for industrial temperature-grade I²C EEPROM replacement.

Technical Context

The 24LC014-I/ST implements a standard two-wire I²C interface with slave addressing via A0–A2 pins, supporting up to eight devices on one bus. Its internal architecture includes an address pointer, page buffer, HV generator for EEPROM programming, and Schmitt-trigger inputs on SDA/SCL for noise immunity.

Write operations are self-timed with ≤5 ms max cycle time; hardware write protection is enabled by tying WP high. The device uses auto-erase during writes and supports byte and page write modes - with page boundaries aligned to 16-byte intervals - requiring software-level boundary management.

Key Specifications

Pinout & Package

24LC014-I/ST is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm wide, with industry-standard pin spacing (1.27 mm pitch) and RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C EEPROM applications.

Compared with 24LC014-I/ST, AT24C01D-SSHM-T offers higher temperature tolerance but removes hardware write protection, while BR24G01NUX-5TR reduces board area and adds flexible software-controlled protection - both require validation of timing margins and interrupt behavior during write cycles.

Availability

24LC014-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across multi-year production cycles.

Supply support for 24LC014-I/ST 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 24LCxx family of I²C EEPROMs was designed specifically for reliable, low-power nonvolatile storage in resource-constrained embedded systems - emphasizing simplicity, long-term data integrity, and drop-in compatibility across voltage and temperature grades.

FAQ

What is the maximum I²C clock frequency supported by the 24LC014-I/ST?

The 24LC014-I/ST supports up to 400 kHz I²C clock frequency when V_CC is 2.5V or higher. At V_CC below 2.5V, the maximum clock rate drops to 100 kHz. This dual-speed capability ensures interoperability with both legacy and high-performance I²C masters while maintaining timing compliance across its full operating voltage range. The 24LC014-I/ST datasheet specifies exact setup/hold times for each condition.

Does the 24LC014-I/ST have hardware write protection, and how is it implemented?

Yes, the 24LC014-I/ST includes hardware write protection via the WP (Write-Protect) pin. When WP is tied to VCC, all write operations to the memory array are inhibited - reads remain fully functional. This feature prevents accidental or malicious overwrites during power transitions or firmware errors. The 24LC014-I/ST requires no internal register writes to enable protection, making it simpler and more robust than software-locked alternatives.

What is the memory organization and page size of the 24LC014-I/ST?

The 24LC014-I/ST is organized as a single block of 128 bytes (128 × 8 bits), with a fixed page size of 16 bytes. Page writes allow up to 16 sequential bytes to be loaded into the internal buffer and committed in one self-timed cycle. Crossing a 16-byte boundary during a page write causes wraparound within the current page - software must enforce alignment to avoid unintended data overwrite.

What temperature range is specified for the 24LC014-I/ST?

The 24LC014-I/ST is rated for the industrial temperature range of -40°C to +85°C, as indicated by the "I" suffix in its part number. This qualification covers operation under continuous thermal stress in environments such as factory floors, outdoor enclosures, and commercial HVAC systems. The device meets Microchip's industrial-grade reliability testing including HTOL and temperature cycling.

How many devices can share the same I²C bus using the 24LC014-I/ST?

Up to eight 24LC014-I/ST devices can operate on the same I²C bus, using unique combinations of the A0, A1, and A2 address pins to generate distinct 7-bit slave addresses (0x50–0x57). Each device must have a hard-wired address; dynamic control of these pins by a microcontroller is unsupported. This enables scalable memory expansion - e.g., aggregating 8 Kbits across eight units - without additional bus arbitration logic.