Microchip Technology 24AA024T-I/MC

Overview

24AA024T-I/MC 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 (WP pin), 400 kHz max clock speed, and industrial temperature range (–40°C to +85°C). It supports up to eight devices on one bus and delivers 1 μA standby current for low-power embedded systems including sensor calibration storage and configuration retention in IoT edge nodes.

For engineers reviewing the 24AA024T-I/MC datasheet, 24AA024T-I/MC pinout, 24AA024T-I/MC application, or 24AA024T-I/MC equivalent, key selection considerations include its 16-byte page write buffer, Schmitt-triggered SDA/SCL inputs for noise immunity, hardware WP functionality, and compatibility with standard I²C masters across 1.7–5.5V supply rails.

Technical Context

The 24AA024T-I/MC implements a true 2-wire I²C interface compliant with standard and fast-mode protocols (100 kHz at VCC < 2.5V; 400 kHz otherwise), featuring open-drain SDA/SCL with internal Schmitt triggers and input filtering (50 ns spike suppression) to ensure robust operation on noisy PCBs. Its address decoding uses three hardware pins (A0–A2) enabling up to eight devices per bus.

Internally, it integrates a 16-byte page write buffer, self-timed erase/write cycle (≤5 ms), and a write-protect circuit tied to the WP pin - active when pulled high - that locks the entire 2 Kbit array. The device employs low-power CMOS design with typical read current of 1 mA and standby current of 1 μA, supporting battery-backed applications.

Key Specifications

Pinout & Package

24AA024T-I/MC is housed in an 8-pin MSOP package (Micro Small Outline Package), measuring 3.0 mm × 3.0 mm with 0.65 mm lead pitch and exposed pad for thermal enhancement. Pin 1 is marked by laser indentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA024T-I/MC, the 24LC024T-I/MC trades 1.7V operation and factory MAC programming for extended temperature range, while AT24C02-MAHM-T sacrifices WP and address flexibility for higher clock speed and broader distributor availability.

Availability

24AA024T-I/MC is available at Aetrix Electronics and suitable for MAC address storage, calibration data retention, and firmware configuration flag applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for 24AA024T-I/MC 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 and manufacturing operations.

The 24AA024T-I/MC belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in space- and power-constrained embedded systems across industrial, automotive, and IoT markets.

FAQ

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

The 24AA024T-I/MC supports up to 400 kHz I²C clock frequency when VCC ≥ 1.8V. At VCC < 1.8V, maximum clock drops to 100 kHz per AC specifications. This dual-speed capability allows interoperability with both standard- and fast-mode I²C masters across wide supply ranges, ensuring reliable communication in mixed-voltage systems where the 24AA024T-I/MC operates.

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

Yes, the 24AA024T-I/MC 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; tying WP to VSS enables full read/write access. This feature prevents accidental overwrites during power-up transients or firmware errors, making the 24AA024T-I/MC especially valuable in safety-critical or field-deployed systems where data integrity is paramount.

Can multiple 24AA024T-I/MC devices share the same I²C bus, and how many are supported?

Yes, up to eight 24AA024T-I/MC devices can share a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit slave addresses. Each pin must be hardwired to either VCC or VSS - floating connections are not permitted. This addressing scheme enables scalable memory expansion (up to 16 Kbit total) without additional address decoding logic, a key advantage of the 24AA024T-I/MC in multi-sensor or modular system designs.

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

The 24AA024T-I/MC features a 16-byte page write buffer, allowing up to 16 bytes to be written in a single I²C transaction before initiating the internal 5 ms write cycle. This reduces bus contention and improves system efficiency compared to byte-wise writes. Because page boundaries align to 16-byte intervals, crossing them causes wraparound - so proper firmware alignment is required. This capability directly enhances throughput in the 24AA024T-I/MC for logging or configuration updates.

Is the 24AA024T-I/MC compatible with 1.8V microcontrollers, and what are the interface requirements?

Yes, the 24AA024T-I/MC operates down to 1.7V and is fully compatible with 1.8V I²C masters. Its Schmitt-triggered SDA/SCL inputs accept VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC, ensuring clean signal recognition. External pull-up resistors (typically 2 kΩ for 400 kHz) must connect to the same 1.8V rail. No level shifting is needed, simplifying integration and preserving signal integrity - a core benefit of the 24AA024T-I/MC in modern ultra-low-voltage designs.