Microchip Technology 24FC01-E/SN

Overview

24FC01-E/SN 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, and extended temperature operation from –40°C to +125°C. It supports 1.7V–5.5V single-supply operation, features an 8-byte page write buffer, and delivers ≤1 µA standby current (E-temp) for ultra-low-power embedded systems such as automotive body controllers and industrial sensor nodes.

For engineers reviewing the 24FC01-E/SN datasheet, 24FC01-E/SN pinout, 24FC01-E/SN application, or 24FC01-E/SN equivalent, key selection criteria include its 1 MHz I²C speed at full V_CC range, E-temp qualification per AEC-Q100, SOIC-8 (SN) package compatibility, and hardware WP pin behavior under extended thermal stress.

Technical Context

The 24FC01-E/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes a 8-byte page latch, HV generator for EEPROM programming, and address pointer logic supporting current-address, random, and sequential read modes.

It operates across two voltage ranges: 1.7V–5.5V for full functionality including 1 MHz clock support, with AC timing parameters (e.g., T_LOW = 500 ns, T_AA = 450 ns) validated over –40°C to +125°C. Write protection is implemented via dedicated WP pin tied to V_CC to inhibit all writes while permitting reads.

Key Specifications

Pinout & Package

24FC01-E/SN is supplied in 8-lead SOIC (SN) package - 3.90 mm body width, standard JEDEC MS-012AC footprint, compatible with automated SMT assembly and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA01-I/SN, the 24FC01-E/SN adds 2.5× higher I²C bandwidth and extended temperature capability; versus AT24C01D-SSHM-T, it offers automotive qualification and SOIC-8 compatibility but requires board-level WP routing instead of integrated lock bits.

Availability

24FC01-E/SN is available at Aetrix Electronics and suitable for automotive body control, industrial sensor calibration, smart energy metering, and medical infusion pump safety parameter storage requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for 24FC01-E/SN 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, serving automotive, industrial, and communications markets with vertically integrated silicon and development tools.

The 24FC01 belongs to Microchip's 24XX01 family of I²C EEPROMs, designed specifically for robust, low-power, and AEC-Q100-compliant nonvolatile storage in harsh environments where data integrity and long-term reliability are critical.

FAQ

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

The 24FC01-E/SN supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range and –40°C to +125°C operating temperature. This is confirmed in Table 1-2 of DS20001711M, where F_CLK = 1000 kHz is specified for 1.7V ≤ V_CC ≤ 5.5V under Extended temperature conditions. The 24FC01-E/SN achieves this speed without requiring external acceleration circuitry or voltage boosting.

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

Yes, the 24FC01-E/SN requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Per Section 2.2 of DS20001711M, a typical 2 kΩ resistor 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 does the WP pin function on the 24FC01-E/SN?

On the 24FC01-E/SN, the WP pin is a dedicated hardware write-protection input. When tied to V_CC, it disables all write operations (byte and page) to the entire memory array (addresses 00h–7Fh), while read operations remain fully functional. When tied to V_SS, normal read/write access is enabled. This behavior is electrically enforced and independent of I²C command sequence or MCU firmware state.

Is the 24FC01-E/SN AEC-Q100 qualified?

Yes, the 24FC01-E/SN is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), as explicitly stated in the "Features" section of DS20001711M. This qualification covers stress testing for temperature cycling, humidity bias, ESD, and other automotive-relevant reliability metrics, making it suitable for under-hood and chassis-mounted applications.

What package type does the 24FC01-E/SN use, and is it RoHS compliant?

The 24FC01-E/SN uses the 8-lead SOIC (Small Outline Integrated Circuit) package denoted by the "SN" suffix, with 3.90 mm body width and standard MS-012AC footprint. It is RoHS compliant, as confirmed in the "Features" list of DS20001711M, and carries the "e3" matte tin finish per JEDEC standards per Package Marking Information on page 14.