Microchip Technology 24FC01-E/ST

Overview

24FC01-E/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 maximum clock frequency at 1.7–5.5 V, and extended temperature operation from –40°C to +125°C. It supports 8-byte page writes, features Schmitt-trigger inputs and slope-controlled outputs, and is used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the 24FC01-E/ST datasheet, 24FC01-E/ST pinout, 24FC01-E/ST application, or 24FC01-E/ST equivalent, this page delivers verified electrical specs, package mapping to SOIC-8 (ST), I²C timing compliance at 1 MHz under extended temp, and validated alternative parts for design continuity and supply resilience.

Technical Context

The 24FC01-E/ST implements a 2-wire I²C interface compliant with standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) protocols - with full AC timing validation across 1.7–5.5 V and –40°C to +125°C. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer logic supporting current-address, random, and sequential read modes.

Write protection is implemented via dedicated WP pin tied to VCC to inhibit all write operations while preserving read access. All inputs (SCL, SDA, WP) include Schmitt-trigger thresholds and input filtering (50 ns spike suppression), and output drive uses slope control to suppress ground bounce during SDA transitions.

Key Specifications

Pinout & Package

24FC01-E/ST is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with body width 3.90 mm (ST suffix per Microchip's package code table). Pin 1 is A0 (no internal connection); pins A1 and A2 are also unconnected. The device uses standard I²C signaling with open-drain SDA requiring external pull-up.

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-E/ST uniquely delivers 1 MHz I²C performance and extended temperature operation in the same SOIC-8 footprint - enabling faster configuration loads and deployment in thermally demanding environments without layout changes.

Availability

24FC01-E/ST is available at Aetrix Electronics and suitable for industrial sensor calibration storage, automotive body control module configuration, and medical infusion pump parameter backup requiring stable component supply and long-term lifecycle assurance.

Supply support for 24FC01-E/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 devices, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.

The 24FC01 belongs to Microchip's 24XX01 family of I²C serial EEPROMs designed specifically for space-constrained, low-power embedded systems needing robust nonvolatile storage with hardware write protection and extended temperature resilience.

FAQ

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

The 24FC01-E/ST supports up to 1 MHz I²C clock frequency across its full 1.7–5.5 V supply range and –40°C to +125°C temperature range. This fast-mode plus capability is validated per Table 1-2 AC Characteristics in DS20001711M, distinguishing it from 24AA01 (400 kHz max) and 24LC01B (400 kHz, 2.5–5.5 V only). The 24FC01-E/ST achieves this with reduced THIGH (260 ns min) and TLOW (500 ns min) timing requirements.

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

Yes, the 24FC01-E/ST requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Per Section 2.2 of DS20001711M, a typical 2 kΩ pull-up is recommended for 1 MHz operation. The value must be selected based on bus capacitance and desired rise time - lower resistance improves speed but increases power consumption during low states.

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

Write protection on the 24FC01-E/ST is controlled by the WP (Write-Protect) pin: when tied to VCC, the entire memory array (addresses 00h–7Fh) is write-inhibited while read operations remain fully functional; when tied to VSS, full read/write access is enabled. This hardware-level protection operates independently of I²C commands and remains active during power transitions, preventing corruption during brownout or reset sequences.

What package type does the 24FC01-E/ST use, and are A0–A2 pins functional?

The 24FC01-E/ST uses an 8-lead SOIC package (3.90 mm body width), indicated by the "ST" suffix per Microchip's packaging table. Pins A0, A1, and A2 are not internally connected - they are NC (no connect) and may be left floating or tied to VSS/VCC without affecting device operation or addressing, as the 24FC01 uses a fixed 4-bit client address (1010b) with no block-select bits.

Can the 24FC01-E/ST be used in automotive applications requiring AEC-Q100 qualification?

Yes, the 24FC01-E/ST is AEC-Q100 qualified for automotive applications. Per the "Features" section of DS20001711M, all 24XX01 devices including the 24FC01 are explicitly stated as "Automotive AEC-Q100 Qualified". The "E" temperature grade (–40°C to +125°C) further confirms suitability for under-hood and powertrain-related ECUs where thermal stress exceeds standard industrial limits.