Microchip Technology 24LC014HT-I/ST

Overview

24LC014HT-I/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with hardware write-protection for the upper half-array (addresses 40h–7Fh), operating from 2.5V to 5.5V, supporting up to 1 MHz clock frequency at industrial temperature (−40°C to +85°C), and packaged in an 8-pin TSSOP. It delivers ultra-low standby current (≤1 μA) and active current (≤400 μA), enabling use in battery-backed real-time clocks and low-power sensor nodes.

For engineers reviewing the 24LC014HT-I/ST datasheet, 24LC014HT-I/ST pinout, 24LC014HT-I/ST application, or 24LC014HT-I/ST equivalent, key selection criteria include its 1 MHz I²C speed rating, half-array hardware write-protect (WP pin), 16-byte page write buffer, 1 million endurance cycles, and TSSOP-8 package compatibility with space-constrained embedded control boards.

Technical Context

The 24LC014HT-I/ST implements a standard two-wire I²C slave interface with Schmitt-trigger inputs and output slope control to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes within physical page boundaries (00h–0Fh, 10h–1Fh, etc.).

Hardware write protection is strictly controlled by the WP pin: tied to VCC, it locks addresses 40h–7Fh; tied to VSS, full array access is enabled. The device uses on-chip high-voltage generation for erase/write operations and includes a VCC threshold detector that disables programming below 1.5 V to prevent data corruption during brown-out conditions.

Key Specifications

Pinout & Package

24LC014HT-I/ST is housed in an 8-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm lead pitch, 3.0 mm × 4.4 mm body size, and exposed pad option not applicable - suitable for automated SMT assembly and thermal performance matching SOIC-8 footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T and BR24G01NUX-5TR, the 24LC014HT-I/ST uniquely balances 1 MHz speed, hardware-based half-array write protection, industrial temperature range, and TSSOP-8 footprint - making it optimal for cost-sensitive, space-constrained embedded systems requiring deterministic write security.

Availability

24LC014HT-I/ST is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC I/O modules, automotive body control units, and medical infusion pumps requiring stable component supply across multi-year production cycles.

Supply support for 24LC014HT-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 24LC014H family is designed for robust, low-power nonvolatile data storage in resource-constrained embedded systems - emphasizing I²C interoperability, hardware security features, and extended temperature reliability for industrial and automotive applications.

FAQ

What is the maximum I²C clock frequency supported by the 24LC014HT-I/ST?

The 24LC014HT-I/ST supports up to 1 MHz I²C clock frequency when VCC is 2.5V or higher, as specified in Microchip's DS22077B datasheet Table 1-2. This is distinct from the 24AA014H variant (max 400 kHz). At 1 MHz, the device achieves faster write throughput for calibration data or firmware patches compared to legacy 100 kHz EEPROMs.

How does the hardware write-protection feature work on the 24LC014HT-I/ST?

The 24LC014HT-I/ST uses the WP pin to enable hardware write-protection for memory addresses 40h–7Fh (upper half-array). When WP is tied to VCC, writes to this region are blocked at the silicon level - no software command can override it. When WP is tied to VSS, full array access is permitted. This provides fail-safe protection for critical calibration or security data.

What package type is used for the 24LC014HT-I/ST?

The 24LC014HT-I/ST is supplied in an 8-pin Thin Shrink Small Outline Package (TSSOP) with 3.0 mm × 4.4 mm body dimensions and 0.65 mm lead pitch. This package is RoHS-compliant, Pb-free, and compatible with standard SMT reflow profiles - offering smaller footprint than PDIP or SOIC while maintaining hand-soldering feasibility.

Does the 24LC014HT-I/ST support page write operations, and what is the buffer size?

Yes, the 24LC014HT-I/ST supports page write operations with a 16-byte buffer. Up to 16 bytes can be loaded into the on-chip buffer and written simultaneously upon receipt of a Stop condition. Physical page boundaries align to 16-byte intervals (e.g., 00h–0Fh), and crossing boundaries causes wraparound - requiring firmware to manage alignment.

What is the endurance and data retention specification for the 24LC014HT-I/ST?

The 24LC014HT-I/ST guarantees 1 million erase/write cycles and 200 years of data retention at 25°C, as confirmed in DS22077B-page 3 (Note 4) and page 1. These values are characterized - not just tested - and apply across the full industrial temperature range (−40°C to +85°C), ensuring long-term reliability in deployed equipment.