Microchip Technology 24AA014-I/MS

Overview

24AA014-I/MS from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 1.7V to 5.5V with hardware write protection, 400 kHz max clock speed, and industrial temperature range (–40°C to +85°C). It supports page writes up to 16 bytes and delivers 1 μA standby current for low-power embedded systems such as sensor calibration storage and firmware configuration retention.

For engineers reviewing the 24AA014-I/MS datasheet, 24AA014-I/MS pinout, 24AA014-I/MS application, or 24AA014-I/MS equivalent, key selection considerations include its MSOP-8 package, 1.7V minimum VCC, hardware WP pin, 1,000,000 erase/write cycles, and compatibility with standard I²C bus timing at both 100 kHz and 400 kHz.

Technical Context

The 24AA014-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, and uses an internal address pointer that auto-increments during sequential reads. Its write-protection circuitry responds directly to the WP pin state-tied to VSS for full write enable, VCC for full array lockout.

It features a 16-byte page buffer enabling burst writes within a single physical page boundary, self-timed internal write cycles (≤5 ms), and acknowledge polling support to maximize bus throughput without fixed delay timing. The device supports up to eight devices on one bus via A0–A2 address pins, with MSOP-8 pinout matching standard SOIC/TSSOP footprints.

Key Specifications

Pinout & Package

24AA014-I/MS is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), compatible with automated SMT assembly and offering thermal performance comparable to SOIC but with 30% smaller footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014-I/MS and AT24C01D-MAHM-T, the 24AA014-I/MS uniquely combines true 1.7V operation, hardware WP, and guaranteed 400 kHz timing across its full voltage range - making it optimal for ultra-low-voltage, safety-aware, and high-throughput I²C configurations.

Availability

24AA014-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy metering requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for 24AA014-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 manufacturing and support infrastructure.

The 24AA014-I/MS belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in industrial, medical, and automotive applications demanding extended temperature operation and high endurance.

FAQ

What is the minimum supply voltage for reliable operation of the 24AA014-I/MS?

The 24AA014-I/MS operates reliably down to 1.7V across its full industrial temperature range (–40°C to +85°C). This enables direct integration into 1.8V systems without level shifters or regulators, unlike the 24LC014-I/MS which requires ≥2.5V. The 24AA014-I/MS maintains full 400 kHz I²C timing and 1 μA standby current at 1.7V, making it ideal for battery-powered and low-voltage embedded designs.

How does the WP pin function on the 24AA014-I/MS?

The WP (Write-Protect) pin on the 24AA014-I/MS is a dedicated hardware control: when tied to VCC, it disables all write operations to the entire 128-byte memory array while permitting unrestricted reads; when tied to VSS, full read/write access is enabled. This hard-wired protection prevents accidental overwrites during power-up, brown-out, or firmware glitches - a critical safeguard for calibration data and safety-critical parameters stored in the 24AA014-I/MS.

Can multiple 24AA014-I/MS devices share the same I²C bus?

Yes, up to eight 24AA014-I/MS devices can operate on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit chip addresses (1010xxx0). Each device must have a distinct combination of logic levels on these pins, hardwired to VSS or VCC. This allows expansion to 8 Kbits of contiguous EEPROM space - a capability fully supported by the 24AA014-I/MS in its MSOP-8 package with all three address pins exposed.

What is the maximum write cycle time for the 24AA014-I/MS?

The 24AA014-I/MS has a maximum write cycle time of 5 ms for both byte and page writes, as specified in the official Microchip DS21809G datasheet. This self-timed internal cycle includes auto-erase and programming; no external delay is needed. During this period, the device does not acknowledge I²C commands - a behavior leveraged by acknowledge polling to determine completion without fixed timing delays in host firmware controlling the 24AA014-I/MS.

Is the 24AA014-I/MS compatible with fast-mode I²C (400 kHz)?

Yes, the 24AA014-I/MS fully supports fast-mode I²C at 400 kHz when VCC is ≥1.8V, meeting all AC timing specifications including THIGH, TLOW, and TSU:DAT. At VCC < 1.8V, it defaults to 100 kHz operation. This dual-speed capability - verified in Table 1-2 of the DS21809G datasheet - ensures interoperability with both legacy and modern I²C masters while maximizing throughput in 3.3V and 5V systems using the 24AA014-I/MS.