Microchip Technology 24AA014H-I/P

Overview

24AA014H-I/P 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 delivers ultra-low standby current (≤1 μA) - ideal for battery-backed memory in embedded control and sensor calibration systems.

For engineers reviewing the 24AA014H-I/P datasheet, 24AA014H-I/P pinout, 24AA014H-I/P application, or 24AA014H-I/P equivalent, key selection considerations include its 1.7V minimum VCC, half-array hardware write-protect via 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/P operates as an I²C slave device with fixed 4-bit control code (1010b) and user-configurable 3-bit chip address (A0–A2), enabling up to eight devices on one bus. Its internal address counter supports current-address, random, and sequential read modes, while the page write buffer enables burst writes of up to 16 bytes within a single physical page boundary.

Write protection is implemented via the WP pin: tied to VCC, it locks addresses 40h–7Fh; tied to VSS, full array access is enabled. The device incorporates a VCC threshold detector that disables erase/write logic below 1.5V and uses Schmitt-trigger inputs with 50 ns spike suppression (TSP) and 0.05×VCC hysteresis (VHYS) for robust bus noise immunity.

Key Specifications

Pinout & Package

24AA014H-I/P is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 300-mil body width, suitable for through-hole prototyping and legacy PCB assembly. Pin numbering follows standard DIP orientation (pin 1 at top-left corner, counterclockwise).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014H-I/P and AT24C01D-SSHM-T, the 24AA014H-I/P uniquely combines 1.7V operation, dedicated hardware write-protect, and industrial temperature rating - making it optimal for ultra-low-voltage, safety-aware embedded systems where deterministic protection and wide supply tolerance are mandatory.

Availability

24AA014H-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart home gateway firmware storage requiring stable component supply across extended production lifecycles.

Supply support for 24AA014H-I/P 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24AA014H-I/P belongs to Microchip's 24AAxxH family of I²C-compatible serial EEPROMs, engineered specifically for low-voltage, low-power, and high-reliability applications in industrial, medical, and automotive environments.

FAQ

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

The 24AA014H-I/P operates down to 1.7V, enabling direct integration with 1.8V microcontrollers and energy-harvesting systems without level-shifting circuitry. This specification is guaranteed across the full industrial temperature range (–40°C to +85°C), and the device includes an internal VCC threshold detector that disables write operations below ~1.5V to prevent data corruption during brown-out conditions.

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

Hardware write protection on the 24AA014H-I/P is controlled by the WP pin: when tied to VCC, it permanently locks addresses 40h–7Fh (upper half of the 128-byte array); when tied to VSS, full array write access is enabled. Unlike software-based protection, this is a physical gate-level disable - immune to firmware bugs, reset glitches, or power interruptions - making it ideal for safeguarding factory calibration data.

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

Yes, up to eight 24AA014H-I/P devices can operate on a single I²C bus using the A0, A1, and A2 pins to configure unique 3-bit slave addresses. Each pin must be hardwired to either VSS or VCC to set its logic level, forming part of the 7-bit I²C address (1010xxx). This enables scalable memory expansion - for example, eight devices provide 8 Kbits of contiguous EEPROM space with no additional address decoding logic.

What is the maximum write cycle time for the 24AA014H-I/P?

The maximum write cycle time for the 24AA014H-I/P is 5 ms for both byte and page writes, as specified in the datasheet (TWC parameter). During this self-timed internal cycle, the device does not acknowledge I²C commands - a behavior leveraged by acknowledge polling to detect completion. This timing is independent of VCC level and applies even when hardware write protection is active.

Is the 24AA014H-I/P RoHS compliant and lead-free?

Yes, the 24AA014H-I/P is Pb-free and RoHS compliant, as explicitly stated in the datasheet features list. The PDIP package uses matte tin (Sn) plating per JEDEC standards, and marking includes the "3e" Pb-free designation. This compliance ensures suitability for environmentally regulated markets including EU, China, and Japan without requiring special exemptions or material declarations.