Microchip Technology 24FC01-I/ST

Overview

24FC01-I/ST from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 1 MHz clock support (down to 1.7V), and 8-byte page write buffer. It operates across -40°C to +85°C industrial temperature range in an 8-lead SOIC package and is used for configuration storage in embedded controllers, sensor calibration data retention, and firmware parameter backup.

For engineers reviewing the 24FC01-I/ST datasheet, 24FC01-I/ST pinout, 24FC01-I/ST application, or 24FC01-I/ST equivalent, this page delivers verified electrical specs, SOIC package terminal mapping, I²C timing compliance at 1 MHz, endurance (1M cycles), and real-world use cases in power-constrained industrial nodes and automotive subsystems.

Technical Context

The 24FC01-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slew-rate-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while the 8-byte page buffer enables efficient burst writes without host-side buffering.

It uses on-chip high-voltage generation for EEPROM programming and features self-timed erase/write cycles with automatic internal timing - no external delay required. Write protection is implemented via dedicated WP pin tied to VCC, disabling all write operations while preserving full read functionality.

Key Specifications

Pinout & Package

8-lead SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant, suitable for automated SMT assembly and reflow profiles per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA01-I/ST and AT24C01D-SSHM-T, the 24FC01-I/ST uniquely delivers 1 MHz I²C performance across the full 1.7–5.5V supply range and industrial temperature grade - making it optimal for next-generation low-voltage, high-reliability embedded systems.

Availability

24FC01-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and smart meter firmware parameter storage requiring stable component supply across extended product lifecycles.

Supply support for 24FC01-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24FC01 belongs to Microchip's 24XX01 family of serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems requiring I²C interface simplicity and robustness.

FAQ

What is the maximum I²C clock frequency supported by the 24FC01-I/ST?

The 24FC01-I/ST supports up to 1 MHz I²C clock frequency across its full 1.7V to 5.5V supply range, unlike the 24AA01-I/ST (max 400 kHz) or 24LC01B-I/ST (max 400 kHz, min 2.5V). This allows faster configuration writes in high-throughput systems without compromising low-voltage operation. The 24FC01-I/ST maintains full AC timing compliance at 1 MHz per DS20001711M Table 1-2.

Does the 24FC01-I/ST require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC01-I/ST requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. For 1 MHz operation, a 2 kΩ pull-up to VCC is recommended per Microchip's DS20001711M specification. Incorrect pull-up values cause timing violations or bus lockup, so resistor selection must match bus capacitance and speed requirements for reliable 24FC01-I/ST operation.

How is write protection implemented on the 24FC01-I/ST?

Write protection on the 24FC01-I/ST is implemented via the dedicated WP (Write-Protect) pin: when tied to VCC, the entire memory array (addresses 00h–7Fh) becomes read-only; when tied to VSS, full read/write access is enabled. This hardware-level lock operates independently of I²C commands and persists across power cycles, providing tamper-resistant configuration security unmatched by software-only schemes in the 24FC01-I/ST.

What is the endurance rating of the 24FC01-I/ST and how is it tested?

The 24FC01-I/ST is rated for 1,000,000 erase/write cycles at 25°C and 5.5V in page mode, as specified in DS20001711M Table 1-2 Note 4. This endurance is ensured by characterization (not 100% tested per unit) and reflects real-world reliability under typical industrial operating conditions. The 24FC01-I/ST's endurance enables daily reconfiguration over 27+ years, supporting long-lifecycle deployments in medical and infrastructure equipment.

Is the 24FC01-I/ST AEC-Q100 qualified and what grade does it meet?

Yes, the 24FC01-I/ST is AEC-Q100 qualified per the device selection table in DS20001711M, meeting Grade 2 requirements (-40°C to +105°C junction temperature). While the "I" suffix denotes industrial temperature range (-40°C to +85°C ambient), its qualification extends reliability validation to automotive environments - making it suitable for body electronics, infotainment, and ADAS subsystems where extended temperature tolerance and stress testing are mandated. The 24FC01-I/ST shares this qualification with other members of the 24XX01 family.