Microchip Technology 24LC014T-I/MS

Overview

24LC014T-I/MS 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 down to 1.7V. It supports 400 kHz clock speed at V_CC ≥ 1.8V, delivers ≤5 ms max write cycle time, and guarantees 1,000,000 erase/write cycles with >200 years data retention. It is used for nonvolatile parameter storage in industrial sensor nodes, power supply configuration, and embedded system calibration.

For engineers reviewing the 24LC014T-I/MS datasheet, 24LC014T-I/MS pinout, 24LC014T-I/MS application, or 24LC014T-I/MS equivalent, key selection considerations include its MSOP-8 package, 1.7–5.5V supply range, I²C address flexibility via A0–A2 pins, and hardware WP pin for full-array write protection - all critical for space-constrained, low-power, and field-upgradeable designs.

Technical Context

The 24LC014T-I/MS implements a standard two-wire I²C interface with slave-only operation, supporting both byte and page write modes (up to 16 bytes per page). Its internal address pointer auto-increments during sequential reads and wraps from 0x7F to 0x00, enabling continuous memory access without external address management.

It uses Schmitt-trigger inputs on SDA/SCL for noise immunity, features programmable device addressing via three hardware-selectable bits (A0–A2), and incorporates an on-chip high-voltage generator for self-timed write/erase cycles - eliminating need for external timing control or erase commands.

Key Specifications

Pinout & Package

24LC014T-I/MS is housed in an 8-pin MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for high-density PCB layouts. Pin 1 is marked by laser indentation; the package is Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014T-I/MS, the 24AA014T-I/MS offers marginally lower standby current at sub-2.5V operation but identical pinout and timing, while the AT24C01D-SSHM-T trades hardware write protection for broader vendor availability and lower unit cost in non-safety contexts.

Availability

24LC014T-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply configuration, and embedded bootloader settings requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24LC014T-I/MS 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 24LC014T-I/MS belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, and pin-efficient nonvolatile storage in space-constrained industrial and automotive applications.

FAQ

What is the maximum I²C clock frequency supported by the 24LC014T-I/MS?

The 24LC014T-I/MS supports up to 400 kHz I²C clock frequency when V_CC is ≥1.8V. At 1.7V ≤ V_CC < 1.8V, the maximum clock rate drops to 100 kHz. This dual-speed capability ensures compatibility with both high-throughput and ultra-low-voltage systems without redesign. The 24LC014T-I/MS datasheet specifies timing parameters including THIGH, TLOW, and rise/fall times for both conditions.

Does the 24LC014T-I/MS require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC014T-I/MS requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz. These resistors ensure proper signal levels and bus timing margins. The 24LC014T-I/MS itself does not integrate pull-ups, so omitting them will prevent reliable communication.

How does the Write-Protect (WP) pin function on the 24LC014T-I/MS?

On the 24LC014T-I/MS, the WP pin provides hardware-level write protection: when tied to VCC, all write operations (byte and page) to the entire 128-byte memory array are inhibited, while read operations remain fully functional. When tied to VSS, full read/write access is enabled. This feature prevents accidental overwrites during power transitions or firmware faults - a critical safeguard in the 24LC014T-I/MS's target applications.

What is the endurance rating of the 24LC014T-I/MS, and how is it validated?

The 24LC014T-I/MS is rated for 1,000,000 erase/write cycles at 25°C and V_CC = 5.5V, based on characterization testing per Microchip's Total Endurance™ Model. This rating is not 100% tested per unit but ensured through accelerated stress profiling and statistical process control. Real-world endurance in the 24LC014T-I/MS remains robust even at elevated temperatures and lower voltages, supporting multi-decade deployments.

Can multiple 24LC014T-I/MS devices share the same I²C bus, and how is addressing managed?

Yes, up to eight 24LC014T-I/MS devices can share one I²C bus using hardware-configurable slave addresses. The A0, A1, and A2 pins set the three LSBs of the 7-bit address (base 0x50), allowing unique addressing without software overhead. Each device must have a distinct A0–A2 combination; floating these pins is not permitted. This capability enables scalable memory expansion - for example, eight 24LC014T-I/MS units provide 8 Kbits of contiguous EEPROM space.