Microchip Technology 24FC02-I/ST

Overview

24FC02-I/ST from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 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 secure parameter storage in embedded controllers and sensor calibration modules.

For engineers reviewing the 24FC02-I/ST datasheet, 24FC02-I/ST pinout, 24FC02-I/ST application, or 24FC02-I/ST equivalent, key selection considerations include its 1.7V–5.5V supply range, 1 µA standby current, Schmitt-triggered I²C inputs, 5 ms max page write time, and AEC-Q100 qualification for automotive subsystems.

Technical Context

The 24FC02-I/ST implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and no internal connection to A0–A2 pins. Its internal architecture includes a page latch buffer, HV generator for EEPROM programming, and noise-suppressing input filters on SDA/SCL.

It supports byte and page write modes with self-timed erase/write cycles, uses acknowledge polling to detect write completion, and enforces hardware write protection via the WP pin-tied to VCC to lock the full 256-byte array against writes while permitting reads.

Key Specifications

Pinout & Package

8-Lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm body width, surface-mountable with gull-wing leads. Pin 1 marked by notch or dot; standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02-I/ST and AT24C02D-SSHM-T, the 24FC02-I/ST uniquely delivers 1 MHz I²C performance at 1.7V, enabling faster configuration loading in energy-harvesting and battery-constrained systems without sacrificing industrial temperature rating or AEC-Q100 compliance.

Availability

24FC02-I/ST is available at Aetrix Electronics and suitable for motor control calibration storage, smart sensor configuration, and automotive body control unit designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 24FC02-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded and automotive markets.

The 24FC02 belongs to Microchip's 24XX02 family of serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in space- and power-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the 24FC02-I/ST?

The 24FC02-I/ST supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range. This is confirmed in the Device Selection Table and AC Characteristics section of DS20001709N, distinguishing it from the 24AA02 (400 kHz) and 24LC02B (400 kHz, min 2.5V). The 24FC02-I/ST maintains this speed even at 1.7V, making it suitable for high-throughput configuration loading in modern low-voltage MCUs.

Does the 24FC02-I/ST require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC02-I/ST requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. Typical values are 2 kΩ for 1 MHz operation and 10 kΩ for 100 kHz, as specified in Section 2.2 of DS20001709N. The resistor value must be selected based on bus capacitance and desired rise time to meet I²C timing requirements - failure to install pull-ups will prevent communication.

How does hardware write protection work on the 24FC02-I/ST?

Hardware write protection on the 24FC02-I/ST is controlled by the WP pin: when tied to VCC, the entire 256-byte memory array (addresses 00h–FFh) becomes read-only; writes are inhibited while reads remain fully functional. When WP is tied to VSS or left floating, normal read/write operation is enabled. This behavior is explicitly defined in Section 2.4 and Figure 6-1 of DS20001709N.

Is the 24FC02-I/ST AEC-Q100 qualified, and what grade does it meet?

Yes, the 24FC02-I/ST is AEC-Q100 qualified, as stated in the Features section of DS20001709N. The "I" suffix denotes Industrial temperature grade (-40°C to +85°C), and the device meets AEC-Q100 Grade 2 requirements for automotive use. This qualification covers stress testing for temperature cycling, humidity, and ESD - critical for deployment in body control modules and infotainment peripherals.

What is the page write buffer size of the 24FC02-I/ST, and how does it affect write operations?

The 24FC02-I/ST has an 8-byte page write buffer, allowing up to eight consecutive bytes to be written in a single I²C transaction before initiating the internal write cycle. This minimizes bus occupation and improves efficiency versus byte-wise writes. However, page boundaries are fixed at 8-byte intervals (e.g., 00h–07h, 08h–0Fh); crossing a boundary causes wraparound within the same page - a constraint documented in Section 6.3 of DS20001709N.