Microchip Technology 24LC014T-I/ST

Overview

24LC014T-I/ST from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz max clock frequency and industrial temperature range (–40°C to +85°C). It features hardware write protection via WP pin, 16-byte page write buffer, and 1,000,000 erase/write cycles - deployed in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.

For engineers reviewing the 24LC014T-I/ST datasheet, 24LC014T-I/ST pinout, 24LC014T-I/ST application, or 24LC014T-I/ST equivalent, key selection criteria include VCC min (2.5V), I²C clock compatibility (100/400 kHz), WP-enabled hardware protection, TSSOP-8 package footprint, and guaranteed 200-year data retention at 85°C.

Technical Context

The 24LC014T-I/ST implements a standard two-wire I²C interface with slave address format '1010' followed by three chip-select bits (A2–A0) and R/W bit, supporting up to eight devices on one bus. Its internal architecture includes an address pointer, page write buffer, HV generator for EEPROM programming, and Schmitt-trigger inputs on SDA/SCL for noise immunity.

Write operations are self-timed with ≤5 ms cycle time; read modes include current-address, random, and sequential reads with automatic address roll-over. Hardware write protection is active when WP = VCC, disabling all writes while preserving read functionality - a critical feature for firmware-critical configuration registers.

Key Specifications

Pinout & Package

24LC014T-I/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, RoHS-compliant matte tin finish, and thermal pad option (not electrically connected). Pin 1 is marked by laser indentation per JEDEC MO-153.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014-I/P and AT24C01D-SSHM-T, the 24LC014T-I/ST offers optimal balance of industrial-grade reliability, TSSOP-8 space efficiency, and strict 2.5–5.5V compatibility - making it ideal for cost-sensitive, surface-mount production designs where voltage rails are stable at 3.3V or 5V.

Availability

24LC014T-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power-fail safe logging requiring stable component supply and long-term lifecycle support.

Supply support for 24LC014T-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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.

The 24LC014T-I/ST belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in space-constrained industrial and automotive applications.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24LC014T-I/ST?

The 24LC014T-I/ST requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Unlike the 24AA014 variant, it does not support operation down to 1.7V. Below 2.5V, the device may fail to acknowledge I²C commands or exhibit incomplete write cycles. Always verify VCC stability under load using the 24LC014T-I/ST's specified 2.5V–5.5V window.

Does the 24LC014T-I/ST support 400 kHz I²C communication at all VCC levels?

Yes, the 24LC014T-I/ST supports 400 kHz I²C clock frequency at VCC ≥ 2.5V, which aligns with its rated operating range. The datasheet explicitly states that 100 kHz is only required for VCC < 2.5V - a condition outside the 24LC014T-I/ST's specification. Therefore, at its valid 2.5–5.5V supply, full fast-mode (400 kHz) operation is assured without timing derating.

How does hardware write protection work on the 24LC014T-I/ST?

Hardware write protection on the 24LC014T-I/ST is controlled by the WP pin: when WP is tied to VCC, all write operations (byte and page) are inhibited, though read operations remain fully functional. This is a physical gate-level disable - no software command can override it. The 24LC014T-I/ST will still acknowledge write attempts, but no data is committed to memory, making it ideal for safeguarding boot-critical parameters.

What is the maximum number of 24LC014T-I/ST devices that can share one I²C bus?

Up to eight 24LC014T-I/ST devices can operate on a single I²C bus using unique combinations of A0, A1, and A2 address pins. Each device responds only when its three address bits match the corresponding bits in the master's transmitted slave address (1010 A2 A1 A0 R/W). This enables scalable memory expansion up to 8 Kbits without additional address decoding logic.

Is the 24LC014T-I/ST pin-compatible with other Microchip 1 Kbit I²C EEPROMs in TSSOP-8?

Yes, the 24LC014T-I/ST is pin-compatible with the 24AA014T-I/ST and 24FC01T-I/ST in the TSSOP-8 package - all share identical pinout (A0–A2, VSS, SDA, SCL, WP, VCC). However, electrical differences exist: 24AA014 supports 1.7V operation, while 24FC01 supports 1 MHz clock. Direct substitution requires verification of VCC and timing requirements for the target application.