Microchip Technology 24LC64FT-I/MNY

Overview

24LC64FT-I/MNY from Microchip Technology Inc. is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 1 μA standby current (I-temp), and hardware write-protect for upper 1/4 array (1800h–1FFFh). It serves as nonvolatile configuration storage in embedded control modules requiring robust data retention and low-power operation.

For engineers reviewing the 24LC64FT-I/MNY datasheet, 24LC64FT-I/MNY pinout, 24LC64FT-I/MNY application, or 24LC64FT-I/MNY equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), TSSOP-8 package compatibility, quarter-array write-protection behavior, and I²C timing compliance at 400 kHz under 2.5V–5.5V supply.

Technical Context

The 24LC64FT-I/MNY implements a two-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 32-byte page buffer enables efficient burst writes.

Write protection is hardware-based via the WP pin: tied to VCC, it inhibits writes only to addresses 1800h–1FFFh (16 Kbits); tied to VSS, full array write access is enabled. The device uses self-timed erase/write cycles with typical 5 ms page write time and supports up to eight devices on one bus via A0–A2 address pins.

Key Specifications

Pinout & Package

24LC64FT-I/MNY is housed in an 8-lead TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C64D-SSHM-T and 24AA64T-I/MNY, the 24LC64FT-I/MNY delivers best-in-class cost-performance balance for industrial 3.3V/5V I²C systems, offering proven 200-year data retention and hardware write-protection without automotive qualification overhead or sub-2.5V operation complexity.

Availability

24LC64FT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, medical diagnostic devices, and automotive body control modules requiring stable component supply, long-term data integrity, and RoHS-compliant packaging.

Supply support for 24LC64FT-I/MNY 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 24LC64F family was designed for low-power, high-reliability nonvolatile storage in industrial and commercial embedded systems, emphasizing I²C compatibility, extended data retention, and robust write-protection architecture.

FAQ

What is the maximum I²C clock frequency supported by the 24LC64FT-I/MNY?

The 24LC64FT-I/MNY supports a maximum I²C clock frequency of 400 kHz across its full industrial temperature range (–40°C to +85°C) and supply voltage range (2.5V to 5.5V). At VCC < 2.5V, the device is not rated for operation; therefore, 400 kHz is its guaranteed fast-mode speed. This enables efficient configuration reads and writes without requiring slower legacy 100 kHz timing.

Does the 24LC64FT-I/MNY require external pull-up resistors on the SDA and SCL lines?

Yes, the 24LC64FT-I/MNY requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz, 10 kΩ is typical. Proper pull-up values ensure valid logic levels, meet rise-time specifications (≤300 ns), and maintain I²C bus integrity in multi-device configurations.

How does the hardware write-protect feature work on the 24LC64FT-I/MNY?

The 24LC64FT-I/MNY's WP pin enables hardware write-protection for the upper 1/4 memory array (addresses 1800h–1FFFh). When WP is tied to VCC, writes to that region are inhibited while reads remain fully functional. When WP is tied to VSS, full array write access is enabled. The pin state is sampled at the STOP condition of each write command, making protection activation immediate and deterministic.

What package type is used for the 24LC64FT-I/MNY, and what are its key mechanical dimensions?

The 24LC64FT-I/MNY uses an 8-lead TSSOP package (3.0 mm × 4.4 mm body, 0.65 mm lead pitch). Its compact footprint supports high-density PCB layouts, and the gull-wing leads facilitate reliable automated optical inspection and solder-joint reliability. The package is Pb-free and RoHS compliant, with markings including "24LC64FT" and date code "I/MNY" indicating industrial temperature grade and manufacturing week/year.

Can multiple 24LC64FT-I/MNY devices share the same I²C bus, and how is addressing managed?

Yes, up to eight 24LC64FT-I/MNY devices can share one I²C bus using the A0, A1, and A2 address pins. Each pin connects to VSS or VCC to set a unique 3-bit chip address, combining with the fixed 4-bit control code (1010b) to form a 7-bit slave address. This enables contiguous 512 Kbit expansion across devices, though sequential reads cannot cross device boundaries.