Microchip Technology 24AA014T-I/OT

Overview

24AA014T-I/OT 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 1 μA standby current and 1 mA active current. It supports 100 kHz/400 kHz clock rates, features hardware write protection via WP pin, and delivers 1 million erase/write cycles with >200-year data retention. It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.

For engineers reviewing the 24AA014T-I/OT datasheet, 24AA014T-I/OT pinout, 24AA014T-I/OT application, or 24AA014T-I/OT equivalent, key selection criteria include low-voltage operation (down to 1.7V), industrial temperature range (–40°C to +85°C), SOT-23-6 package compatibility, I²C bus address flexibility (up to eight devices), and page-write capability for up to 16 bytes per cycle.

Technical Context

The 24AA014T-I/OT implements a standard two-wire I²C interface with slave addressing using A0–A1 pins (A2 not present in SOT-23), supporting both byte and page write modes. Its internal address pointer auto-increments during sequential reads and wraps at 07Fh, enabling full memory access in one transaction.

Write protection is controlled solely by the WP pin-tied to VSS for enable, VCC for full-array lockout-and the device uses self-timed internal write cycles with 5 ms maximum duration. Acknowledge polling is supported to detect write completion without fixed delays.

Key Specifications

Pinout & Package

24AA014T-I/OT is supplied in a Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm). Pin 1 is laser-marked; the exposed pad is not present in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC014T-I/OT and AT24C01D-SSHM-T, the 24AA014T-I/OT uniquely supports 1.7V operation and industrial-grade reliability at identical footprint and pinout - making it the sole choice for 1.8V embedded systems requiring guaranteed low-voltage write capability.

Availability

24AA014T-I/OT is available at Aetrix Electronics and suitable for smart sensor nodes, industrial PLC modules, and consumer IoT gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 24AA014T-I/OT 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The 24AA014T-I/OT belongs to Microchip's 24AAxx family of I²C EEPROMs, designed specifically for cost-sensitive, low-power embedded applications requiring robust nonvolatile storage in compact packages.

FAQ

What is the minimum supply voltage required for reliable operation of the 24AA014T-I/OT?

The 24AA014T-I/OT operates reliably down to 1.7V V_CC, as specified in its DC characteristics table. This allows direct integration with 1.8V microcontrollers without level shifters. At V_CC < 1.8V, the maximum I²C clock rate is limited to 100 kHz to ensure timing margin. The 24AA014T-I/OT maintains full functionality-including page writes and acknowledge polling-at 1.7V, unlike the 24LC014T-I/OT which requires ≥2.5V.

Does the 24AA014T-I/OT support hardware write protection, and how is it implemented?

Yes, the 24AA014T-I/OT supports hardware write protection via the WP (Write-Protect) pin. When WP is tied to V_CC, all write operations-including byte and page writes-are inhibited while read operations remain fully functional. When WP is tied to V_SS, writes are enabled. The 24AA014T-I/OT does not implement software write protection; the WP pin is the sole hardware mechanism, and its state is sampled at the start of each write command.

How many devices can be connected on the same I²C bus using the 24AA014T-I/OT?

Up to four 24AA014T-I/OT devices can share the same I²C bus, due to the absence of the A2 pin in the SOT-23-6 package. Addressing uses only A1 and A0, generating four unique 7-bit slave addresses (0x50–0x53). This differs from the 8-pin variants (e.g., SOIC), which support eight devices using A2–A0. Bus capacitance and pull-up strength must be recalculated for multi-device configurations to maintain signal integrity.

What is the maximum page write size supported by the 24AA014T-I/OT?

The 24AA014T-I/OT supports a maximum page write size of 16 bytes. The internal page buffer accepts up to 16 consecutive bytes within a single physical page boundary (addresses 0x00–0x0F, 0x10–0x1F, etc.). Attempting to write across a page boundary causes wraparound within the current page, overwriting earlier data. To avoid corruption, firmware must align page writes to 16-byte boundaries and limit transfers to ≤16 bytes per STOP condition.

Is the 24AA014T-I/OT compatible with standard I²C protocols and timing specifications?

Yes, the 24AA014T-I/OT is fully compliant with standard I²C protocol definitions, including START/STOP conditions, ACK/NACK signaling, and clock stretching. Its AC specifications meet I²C Standard Mode (100 kHz) and Fast Mode (400 kHz) timing requirements across its full V_CC and temperature range. It supports acknowledge polling and does not generate spurious ACKs during internal write cycles, ensuring interoperability with all standard I²C masters.