Microchip Technology 24AA024T-I/SN

Overview

24AA024T-I/SN from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 1.7V to 5.5V with hardware write-protection via the WP pin, 400 kHz max clock speed, and industrial temperature range (–40°C to +85°C). It supports page writes up to 16 bytes and delivers ultra-low standby current (1 μA typical) for battery-powered sensor nodes and embedded configuration storage.

For engineers reviewing the 24AA024T-I/SN datasheet, 24AA024T-I/SN pinout, 24AA024T-I/SN application, or 24AA024T-I/SN equivalent, key selection criteria include its 8-pin SOIC package, hardware write-protect capability, Schmitt-trigger noise immunity on SDA/SCL, and guaranteed 1 million erase/write cycles with >200-year data retention.

Technical Context

The 24AA024T-I/SN implements a standard two-wire I²C interface with slave addressing using A0–A2 pins, supporting up to eight devices on one bus. Its internal architecture includes a 16-byte page buffer, self-timed erase/write cycle, and voltage threshold detector disabling write logic below 1.5V.

Schmitt-trigger inputs on SDA and SCL provide noise suppression, while output slope control minimizes ground bounce. The device uses open-drain I/O requiring external pull-ups and features acknowledge polling to detect write completion without fixed timing delays.

Key Specifications

Pinout & Package

24AA024T-I/SN is supplied in an 8-lead SOIC (3.90 mm) package with gull-wing leads, RoHS-compliant matte tin finish, and JEDEC-standard footprint compatible with automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024T-I/SN, the 24LC024T-I/SN trades 1.7V compatibility for broader legacy support, while the AT24C02D-SSHM-T offers higher bandwidth at the expense of hardware write protection-making 24AA024T-I/SN optimal for safety-critical, low-voltage, and tamper-resistant use cases.

Availability

24AA024T-I/SN is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration backup, and medical sensor serial number registry requiring stable component supply across extended production lifecycles.

Supply support for 24AA024T-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA024T-I/SN belongs to Microchip's 24XX024 family of I²C EEPROMs, engineered for reliability in industrial, automotive, and medical applications where data integrity, low power, and long-term retention are mandatory.

FAQ

What is the maximum I²C clock frequency supported by the 24AA024T-I/SN?

The 24AA024T-I/SN supports up to 400 kHz I²C clock frequency when VCC is 1.8V or higher. At VCC between 1.7V and 1.8V, the maximum clock rate is limited to 100 kHz per electrical specifications. This dual-speed capability allows interoperability with both legacy and modern I²C masters while maintaining robust timing margins at low voltage.

Does the 24AA024T-I/SN have hardware write protection, and how is it implemented?

Yes, the 24AA024T-I/SN includes a dedicated hardware write-protect (WP) pin. When WP is tied to VCC, the entire 2 Kbit memory array is locked against write operations-including byte, page, and erase commands-while reads remain fully functional. This physical lock prevents corruption during power transitions or firmware errors, and is a distinguishing feature versus the 24AA025 variant.

How many devices can be connected on the same I²C bus using the 24AA024T-I/SN?

Up to eight 24AA024T-I/SN devices can be connected on a single I²C bus using the three address pins A0, A1, and A2. Each device is assigned a unique 3-bit chip select code (000 to 111), resulting in distinct I²C slave addresses (0xA0–0xA7). This enables scalable memory expansion to 16 Kbit without additional address decoding logic.

What is the page write capability of the 24AA024T-I/SN, and why does it matter?

The 24AA024T-I/SN features a 16-byte page write buffer, allowing up to 16 bytes to be written in a single I²C transaction. This reduces bus overhead versus individual byte writes-cutting total transfer time by ~75% for full-page updates-and minimizes master CPU involvement. Page boundaries align to 16-byte offsets (0x00–0x0F, 0x10–0x1F, etc.), requiring software to manage wraparound.

Is the 24AA024T-I/SN compatible with 1.8V microcontrollers?

Yes, the 24AA024T-I/SN is fully compatible with 1.8V systems: it operates from 1.7V to 5.5V, accepts 0.7×VCC VIH and 0.3×VCC VIL logic thresholds, and maintains full 400 kHz I²C performance above 1.8V. Its Schmitt-trigger inputs and noise-suppression filters ensure reliable communication even with marginal signal integrity on low-voltage buses.