Microchip Technology 24AA014H-I/MS

Overview

24AA014H-I/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with industrial temperature range (–40°C to +85°C), 1.7V–5.5V supply operation, and hardware write-protection for the upper half-array (addresses 40h–7Fh). It supports up to 400 kHz clock frequency, features Schmitt-trigger inputs and slope-controlled outputs for noise immunity, and is packaged in an 8-pin MSOP. It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs.

For engineers reviewing the 24AA014H-I/MS datasheet, 24AA014H-I/MS pinout, 24AA014H-I/MS application, or 24AA014H-I/MS equivalent, key selection considerations include its 1.7V minimum VCC, half-array hardware write-protect (WP pin), 16-byte page write buffer, 1 million endurance cycles, and compatibility with standard I²C bus timing at 100/400 kHz.

Technical Context

The 24AA014H-I/MS implements a two-wire I²C slave interface with fixed 4-bit control code (1010b), three programmable chip-select bits (A0–A2), and R/W bit-driven read/write mode selection. Its internal address pointer auto-increments during sequential reads and wraps from 07Fh to 000h.

Write operations use an on-chip 16-byte page buffer and self-timed erase/write cycle (max 5 ms); hardware write protection is activated when WP = VCC, locking addresses 40h–7Fh. The device employs Schmitt-trigger inputs and output slope control to suppress ground bounce and tolerate bus noise up to 50 ns spikes.

Key Specifications

Pinout & Package

24AA014H-I/MS is housed in an 8-pin MSOP (Mini Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (not electrically connected). This package provides thermal and space advantages over SOIC in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA014H-I/MS, the 24LC014H-I/MS offers faster clock support but sacrifices low-voltage operation, while the AT24C01D-MAHM-T provides enhanced ESD tolerance at the cost of longer write latency - both require validation of WP pin logic and page-write boundary handling in firmware.

Availability

24AA014H-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power management IC setup requiring stable component supply, long-term data retention, and I²C bus compatibility.

Supply support for 24AA014H-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 microcontroller, analog, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA014H belongs to Microchip's 24AAxx family of I²C-compatible serial EEPROMs, designed specifically for low-power, space-constrained embedded systems requiring reliable nonvolatile storage with minimal external components.

FAQ

What is the minimum operating voltage for the 24AA014H-I/MS?

The 24AA014H-I/MS operates down to 1.7V across its full industrial temperature range (–40°C to +85°C). This allows direct interfacing with 1.8V logic families and ultra-low-power microcontrollers without level shifters or regulators. Below 1.8V, maximum clock frequency is limited to 100 kHz per datasheet DS22077B, page 3.

How does the hardware write-protection work on the 24AA014H-I/MS?

When the WP pin of the 24AA014H-I/MS is tied to VCC, hardware write protection is enabled and locks addresses 40h–7Fh (upper half of the 128-byte array). Writes to this region are ignored, though the device still acknowledges the command. Protection is disabled when WP = VSS, allowing full-array writes. No software configuration is required.

What is the maximum page write size supported by the 24AA014H-I/MS?

The 24AA014H-I/MS supports a 16-byte page write buffer. When performing a page write, the master sends a start condition, control byte, word address, and up to 16 data bytes before issuing a stop condition. The device internally writes all buffered bytes in a single self-timed cycle (max 5 ms), improving bus efficiency versus byte-by-byte writes.

Can multiple 24AA014H-I/MS devices share the same I²C bus?

Yes - up to eight 24AA014H-I/MS devices can operate on a single I²C bus using unique slave addresses. Address bits A0, A1, and A2 (pins 1–3) determine the three LSBs of the 7-bit address (base 1010b). Each device must have a distinct A0–A2 combination; all pins must be hardwired to VSS or VCC - floating connections are not permitted.

What packaging and temperature grade does the 24AA014H-I/MS use?

The 24AA014H-I/MS uses an 8-pin MSOP package (3.0 mm × 3.0 mm body, 0.65 mm pitch) and is rated for the industrial temperature range of –40°C to +85°C. The "I" suffix denotes industrial grade, and "MS" explicitly identifies the MSOP package variant per Microchip's part numbering convention in DS22077B, page 14.