Microchip Technology 24AA014H-I/SN

Overview

24AA014H-I/SN 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, and is used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.

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

Technical Context

The 24AA014H-I/SN operates as an I²C slave device with fixed 4-bit control code '1010', three user-configurable 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 cycles (max 5 ms); acknowledge polling is supported to detect write completion. Hardware write protection is activated when WP = VCC, locking addresses 40h–7Fh - independent of software control or I²C command state.

Key Specifications

Pinout & Package

24AA014H-I/SN is supplied in 8-pin SOIC (150 mil) package (package code /SN), with gull-wing leads, 1.27 mm pitch, and body dimensions 3.9 mm × 4.9 mm × 1.75 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA014H-I/SN, 24LC014H-I/SN offers higher speed but narrower voltage range, while AT24C01D-SSHM-T omits hardware write protection - making 24AA014H-I/SN uniquely suited for low-voltage, tamper-resistant parameter storage where physical WP enforcement is mandatory.

Availability

24AA014H-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and firmware parameter backup requiring stable component supply across extended product lifecycles.

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

The 24AA014H belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in space-constrained industrial, automotive, and consumer applications where I²C interface simplicity and voltage flexibility are critical.

FAQ

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

The 24AA014H-I/SN operates down to 1.7V, enabling direct integration with 1.8V microcontrollers and low-power systems without level-shifting circuitry. Below 1.7V, the internal voltage detector disables write operations to prevent data corruption, and the device enters a high-impedance state on SDA/SCL.

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

When the WP pin of the 24AA014H-I/SN is tied to VCC, the upper half of the memory array (addresses 40h–7Fh) becomes permanently write-protected - no I²C command can modify those locations. Writes to the lower half (00h–3Fh) remain fully functional, and all read operations are unaffected regardless of WP state.

Can the 24AA014H-I/SN be used on the same I²C bus as other 24xx-series EEPROMs?

Yes - the 24AA014H-I/SN uses the standard I²C 7-bit slave address format with control code '1010' and three configurable chip-select bits (A0–A2), allowing up to eight 24AA014H-I/SN devices or mixed 24xx EEPROMs (e.g., 24AA02E48, 24LC04B) on one bus, provided each has a unique A0–A2 combination.

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

The 24AA014H-I/SN supports a 16-byte page write buffer. When performing a page write, the master must ensure all transmitted bytes fall within the same 16-byte physical page boundary (e.g., addresses 00h–0Fh, 10h–1Fh); crossing boundaries causes wraparound and data overwrite within the current page.

Does the 24AA014H-I/SN require external components for I²C bus operation?

Yes - the 24AA014H-I/SN requires external pull-up resistors on both SDA and SCL lines. Typical values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz. No additional filtering or termination is needed due to integrated Schmitt triggers and 50 ns input spike suppression.