Microchip Technology 24FC64F-I/MS

Overview

24FC64F-I/MS from Microchip Technology Inc. is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit memory, operating from 1.7V to 5.5V with 1 MHz max clock frequency (at V_CC ≥ 2.5V), 5 ms typical page write time, and hardware write-protect for upper 1/4 array (1800h–1FFFh). It serves as nonvolatile configuration storage in low-power embedded systems such as smart sensors and portable medical devices.

For engineers reviewing the 24FC64F-I/MS datasheet, 24FC64F-I/MS pinout, 24FC64F-I/MS application, or 24FC64F-I/MS equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), MSOP-8 package footprint, 1 MHz I²C timing compliance, and quarter-array hardware write-protection - all critical for reliable data retention in battery-powered edge nodes.

Technical Context

The 24FC64F-I/MS 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 within physical page boundaries (0–31, 32–63, etc.).

Write protection is implemented via the WP pin, which-when tied to V_CC-inhibits writes only to addresses 1800h–1FFFh; reads remain fully accessible. Acknowledge polling is supported to detect write-cycle completion without fixed delays, improving bus utilization in time-sensitive firmware.

Key Specifications

Pinout & Package

24FC64F-I/MS is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance and reworkability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA64F-I/MS, the 24FC64F-I/MS delivers 2.5× faster write throughput and identical low-voltage operation, while AT24C64D-MAHM-T trades hardware write-protection for software-configurable access control - making 24FC64F-I/MS optimal for time-critical, safety-aware embedded storage.

Availability

24FC64F-I/MS is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, medical device parameter backup, and IoT edge node identity storage requiring stable component supply across extended production lifecycles.

Supply support for 24FC64F-I/MS 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 solutions for embedded control applications.

The 24FC64F belongs to Microchip's 24XX64F family of I²C EEPROMs, designed specifically for low-power, high-reliability nonvolatile storage in battery-operated and industrial environments where voltage flexibility and data integrity are critical.

FAQ

What is the maximum I²C clock frequency supported by the 24FC64F-I/MS?

The 24FC64F-I/MS supports up to 1 MHz I²C clock frequency when V_CC is 2.5V or higher. At V_CC between 1.7V and 2.5V, the maximum clock rate drops to 400 kHz. This dual-speed capability allows the 24FC64F-I/MS to maintain high throughput in 3.3V/5V systems while remaining functional in ultra-low-voltage 1.8V designs. Timing parameters such as THIGH, TLOW, and TAA are specified accordingly in the datasheet.

Does the 24FC64F-I/MS have hardware write-protection, and how is it implemented?

Yes, the 24FC64F-I/MS includes hardware write-protection for the upper 1/4 of its memory array (addresses 1800h–1FFFh) via the WP pin. When WP is tied to V_CC, writes to that region are blocked; reads remain fully enabled. The protection is sampled at the Stop bit of each write command, ensuring deterministic behavior. This feature is physically implemented in silicon and does not rely on software commands or fuse settings, making it immune to firmware errors.

What package type is used for the 24FC64F-I/MS, and what are its key mechanical dimensions?

The 24FC64F-I/MS uses an 8-lead MSOP package (Micro Small Outline Package) with body dimensions of 3.0 mm × 3.0 mm and 0.65 mm lead pitch. It features gull-wing leads for standard reflow soldering and meets JEDEC MO-187 specifications. The "I/MS" suffix explicitly denotes Industrial temperature grade (−40°C to +85°C) and MSOP packaging, distinguishing it from PDIP, SOIC, or TSSOP variants of the same part number.

How many devices can be connected on the same I²C bus using the 24FC64F-I/MS?

Up to eight 24FC64F-I/MS devices can be connected on a single I²C bus using the three hardware address pins A0, A1, and A2. Each combination of logic levels on these pins sets a unique 3-bit chip address, allowing the master to select individual devices via the 7-bit slave address format (1010 A2 A1 A0 R/W). All devices share the same SDA and SCL lines, enabling scalable memory expansion up to 512 Kbits total address space.

What is the endurance and data retention specification for the 24FC64F-I/MS?

The 24FC64F-I/MS guarantees 1,000,000 erase/write cycles per memory location and greater than 200 years of data retention at +85°C ambient temperature. These specifications are validated under worst-case conditions (25°C, 5.5V) per Microchip's characterization methodology and apply across the full industrial temperature range. The 24FC64F-I/MS achieves this reliability through advanced floating-gate EEPROM technology and on-chip write-cycle timing control.