Microchip Technology 24FC01T-I/MUY

Overview

24FC01T-I/MUY 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 industrial temperature range (–40°C to +85°C). It features 8-byte page write buffer, Schmitt-trigger inputs, and <1 µA standby current - used for firmware parameter storage in embedded controllers and sensor calibration data retention.

For engineers reviewing the 24FC01T-I/MUY datasheet, 24FC01T-I/MUY pinout, 24FC01T-I/MUY application, or 24FC01T-I/MUY equivalent, key selection considerations include V_CC operating range (1.7–5.5 V), extended-temperature compatibility, I²C bus timing at 1 MHz, and hardware WP pin behavior for secure configuration locking.

Technical Context

The 24FC01T-I/MUY implements a standard two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer auto-increment logic supporting sequential reads and page-aligned writes.

It uses CMOS process technology with Schmitt-trigger inputs and output slope control to suppress noise and eliminate ground bounce. Write protection is implemented via dedicated WP pin tied to V_CC (full array lock) or V_SS (enabled), independent of I²C command flow.

Key Specifications

Pinout & Package

24FC01T-I/MUY is packaged in an 8-lead UDFN (2 mm × 3 mm, 0.5 mm pitch) with wettable flank leads. The exposed pad is electrically unconnected and may be left floating or tied to V_SS for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA01T-I/MUY and AT24C01D-MAHM-T, the 24FC01T-I/MUY uniquely delivers 1 MHz I²C performance *and* hardware write protection in the same compact UDFN package - critical for time-sensitive, safety-critical, or high-reliability deployments.

Availability

24FC01T-I/MUY is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy metering requiring stable component supply and long-term obsolescence management.

Supply support for 24FC01T-I/MUY 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 industrial, automotive, and consumer markets with vertically integrated silicon and development tools.

The 24FC01T-I/MUY belongs to Microchip's 24XX01 family of serial EEPROMs, designed specifically for reliable, low-power, and noise-immune nonvolatile storage in resource-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the 24FC01T-I/MUY?

The 24FC01T-I/MUY supports up to 1 MHz I²C clock frequency across its full 1.7 V to 5.5 V V_CC range. This is confirmed in Table 1-2 of DS20001711M, distinguishing it from the 24AA01 (max 400 kHz) and 24LC01B (max 400 kHz, min 2.5 V). The 1 MHz capability enables faster parameter loading in time-critical applications using the 24FC01T-I/MUY.

Does the 24FC01T-I/MUY require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC01T-I/MUY requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values are 2 kΩ for 1 MHz operation, per Section 2.2 of DS20001711M. The 24FC01T-I/MUY does not integrate internal pull-ups, so omission will result in bus failure.

How does the WP pin function on the 24FC01T-I/MUY?

On the 24FC01T-I/MUY, the WP pin is a hardware write-protection input: when tied to V_CC, the entire 128-byte memory array (addresses 00h–7Fh) is locked against write operations while read access remains fully functional. When tied to V_SS, normal read/write operation resumes. This behavior is explicitly defined in Section 2.4 and Figure 6-1 of DS20001711M.

Is the 24FC01T-I/MUY AEC-Q100 qualified?

Yes, the 24FC01T-I/MUY is AEC-Q100 qualified, as stated in the "Features" section of DS20001711M. This qualification applies to the full 24XX01 family including the 24FC01 variant, confirming its suitability for automotive applications such as body control modules and sensor interfaces where reliability under temperature and vibration stress is mandatory.

What is the endurance rating of the 24FC01T-I/MUY, and how is it measured?

The 24FC01T-I/MUY is rated for 1,000,000 erase/write cycles, specified in Table 1-2 (Parameter 18) of DS20001711M. This endurance is characterized at 25°C and 5.5 V using page-mode writes, and reflects guaranteed minimum lifetime under typical operating conditions - enabling robust use in applications requiring frequent updates like energy meter event logging or test equipment calibration cycles.