Microchip Technology 24LC014-I/SN

Overview

24LC014-I/SN 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 speed at V_CC ≥ 2.5V, delivers 1 mA typical active current and 1 µA standby current, and features a 16-byte page write buffer for efficient data storage in industrial temperature range (–40°C to +85°C). It is widely used for configuration storage in microcontroller-based embedded systems.

For engineers reviewing the 24LC014-I/SN datasheet, 24LC014-I/SN pinout, 24LC014-I/SN application, or 24LC014-I/SN equivalent, key selection criteria include its I²C interface compatibility, 2.5V minimum supply voltage, industrial-grade temperature rating, hardware WP pin control, and SOIC-8 package footprint - all critical for reliable nonvolatile memory integration in space-constrained, low-power designs.

Technical Context

The 24LC014-I/SN implements a standard two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups, and uses Schmitt-trigger inputs on SDA, SCL, and WP for noise immunity. Its internal address pointer auto-increments during sequential reads and wraps from 0x7F to 0x00, enabling full-array streaming without readdressing.

Write operations are self-timed with ≤5 ms max cycle time, supporting both byte and page writes (up to 16 bytes per page), while hardware write protection via the WP pin disables all writes when pulled high - independent of software commands. The device supports up to eight devices on one bus using A0–A2 address inputs, with SOIC-8 pinout matching industry-standard 150-mil SOIC footprints.

Key Specifications

Pinout & Package

24LC014-I/SN is packaged in an 8-lead SOIC (150 mil) with standard pin spacing and JEDEC-compliant dimensions. The package is Pb-free and RoHS compliant, suitable for surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014-I/SN, 24AA014-I/SN extends voltage range downward for 1.8V operation, while AT24C01D-SSHM-T trades hardware WP for software-managed protection - making 24LC014-I/SN optimal for industrial designs requiring guaranteed hardware write disable at all times.

Availability

24LC014-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power meter firmware parameter storage requiring stable component supply across extended production lifecycles.

Supply support for 24LC014-I/SN 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 24LC014-I/SN belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile data storage in industrial, automotive, and consumer applications demanding high reliability and long-term data integrity.

FAQ

What is the minimum supply voltage required for reliable operation of the 24LC014-I/SN?

The 24LC014-I/SN requires a minimum supply voltage of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Below 2.5V, the device is not specified - unlike the 24AA014 variant, which supports down to 1.7V. Operating the 24LC014-I/SN at voltages lower than 2.5V may result in undefined behavior or failure to respond on the I²C bus.

Does the 24LC014-I/SN support 400 kHz I²C communication at all supply voltages?

No. The 24LC014-I/SN supports 400 kHz I²C clock frequency only when V_CC is 2.5V or higher. At V_CC < 2.5V, the maximum clock frequency is limited to 100 kHz. This is explicitly defined in the Device Selection Table and AC Characteristics section of the DS21809G datasheet for the 24LC014-I/SN.

How does the Write-Protect (WP) pin function on the 24LC014-I/SN?

On the 24LC014-I/SN, the WP pin provides hardware-level write inhibition: when tied to V_CC, all write operations (byte and page) are blocked while read operations remain fully functional. When tied to V_SS, full read/write access is enabled. This physical control prevents accidental overwrites even during firmware faults or power transients.

What is the maximum number of 24LC014-I/SN devices that can share the same I²C bus?

Up to eight 24LC014-I/SN devices can share a single I²C bus, enabled by the three hardware address inputs (A0, A1, A2). Each device is assigned a unique 3-bit chip address, resulting in eight distinct I²C slave addresses (0x50–0x57). This allows up to 8 Kbits of contiguous EEPROM capacity when addressed in software across multiple devices.

Is the 24LC014-I/SN pin-compatible with other Microchip 1 Kbit I²C EEPROMs like the 24AA014-I/SN?

Yes - the 24LC014-I/SN and 24AA014-I/SN share identical SOIC-8 pinout, pin functions, and I²C protocol implementation. They differ only in minimum supply voltage (2.5V vs. 1.7V) and default qualification voltage range. No PCB layout changes are needed when substituting between these two parts, provided the system operates at ≥2.5V.