Microchip Technology 24LC024T-I/ST

Overview

24LC024T-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with hardware write-protection (WP pin), 400 kHz max clock, and industrial temperature range (–40°C to +85°C). It features 16-byte page write buffer, Schmitt-trigger inputs, and <1 μA standby current - used for parameter storage in embedded controllers, sensor calibration data retention, and configuration backup in industrial PLC modules.

For engineers reviewing the 24LC024T-I/ST datasheet, 24LC024T-I/ST pinout, 24LC024T-I/ST application, or 24LC024T-I/ST equivalent, key selection criteria include VCC voltage compatibility (2.5–5.5V), WP-enabled hardware protection, TSSOP-8 package footprint, and I²C timing compliance at 400 kHz under industrial temperature conditions.

Technical Context

The 24LC024T-I/ST implements a standard two-wire I²C slave interface with fixed 7-bit address prefix '1010', three hardware address pins (A0–A2), and dedicated WP input for full-array write protection. Its internal architecture includes a 16-byte page buffer, self-timed erase/write cycle, and on-chip HV generator for EEPROM programming.

It supports both byte and page write modes, with automatic address pointer increment and wraparound on sequential reads. Noise immunity is ensured via Schmitt-trigger inputs on SDA/SCL and input filter spike suppression (50 ns), enabling reliable operation in electrically noisy industrial environments without external filtering.

Key Specifications

Pinout & Package

24LC024T-I/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, 3.0 mm × 4.4 mm body, and exposed pad not connected internally. Pin 1 is marked by laser dot; pin 1 corner is located at top-left when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC024T-I/ST, the 24AA024T-I/ST extends voltage flexibility at the cost of missing automotive qualification, while AT24C02D-SSHM-T trades hardware WP for lower unit cost and broader voltage support - making it viable only where firmware-controlled protection suffices.

Availability

24LC024T-I/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter configuration storage, and PLC I/O module design requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for 24LC024T-I/ST 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 nonvolatile memory solutions, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.

The 24LC024T-I/ST belongs to Microchip's legacy serial EEPROM product line designed for cost-sensitive, space-constrained industrial and consumer applications requiring reliable, low-power, I²C-compatible nonvolatile storage.

FAQ

What is the maximum I²C clock frequency supported by the 24LC024T-I/ST?

The 24LC024T-I/ST supports up to 400 kHz I²C clock frequency across its full VCC range (2.5V–5.5V) and industrial temperature range (–40°C to +85°C). At 5.5V, timing parameters such as THIGH (600 ns min) and TLOW (1300 ns min) ensure robust setup/hold compliance. Below 2.5V, operation is not specified - this distinguishes it from the 24AA024 variant.

Does the 24LC024T-I/ST have hardware write-protection, and how is it implemented?

Yes, the 24LC024T-I/ST includes a dedicated WP (Write-Protect) pin. When tied to VCC, it disables all write operations to the entire 256-byte memory array; when tied to VSS, writes are permitted. This hardware lock remains active independent of I²C commands or power cycling - a key reliability feature absent in 24LC025 and AT24C02 variants.

What package type is used for the 24LC024T-I/ST, and what are its key mechanical dimensions?

The 24LC024T-I/ST uses an 8-lead TSSOP package (JEDEC MO-153) with 0.65 mm lead pitch, 3.0 mm × 4.4 mm body size, and 1.2 mm max height. Pin 1 is laser-marked; the package is Pb-free and RoHS compliant. It is not pin-compatible with SOIC-8 due to narrower lead spacing and different thermal pad configuration.

How many devices can be connected on the same I²C bus using the 24LC024T-I/ST?

Up to eight 24LC024T-I/ST devices can share a single I²C bus using the three hardware address pins (A0, A1, A2), which configure the slave address bits (1010 A2 A1 A0 R/W). Each device must have a unique A0–A2 combination, yielding addresses 0x50 through 0x57. The TSSOP-8 package supports full 3-bit addressing - unlike SOT-23 variants limited to two bits.

What is the page write capability of the 24LC024T-I/ST, and why does it matter for system design?

The 24LC024T-I/ST features a 16-byte page write buffer, allowing up to 16 bytes to be written in a single I²C transaction with one Stop condition. This reduces bus overhead by ~94% compared to individual byte writes and accelerates firmware updates or bulk parameter saves - critical for minimizing host MCU intervention time in real-time systems.