Microchip Technology 24FC02-I/SN

Overview

24FC02-I/SN 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 industrial temperature range (–40°C to +85°C). It features 8-byte page write buffer, Schmitt-trigger inputs, slope-controlled outputs, and >1 million erase/write cycles - deployed in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.

For engineers reviewing the 24FC02-I/SN datasheet, 24FC02-I/SN pinout, 24FC02-I/SN application, or 24FC02-I/SN equivalent, this page delivers verified electrical specs, SOIC-8 package layout, I²C timing compliance at 1 MHz, endurance and retention metrics, and validated alternative parts for design continuity and supply resilience.

Technical Context

The 24FC02-I/SN implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control, supporting byte and page write modes with self-timed internal erase/write cycles. Its Address Pointer auto-increments during sequential reads and random access, enabling efficient block-level data retrieval without host-side address management.

It integrates Schmitt-trigger inputs and output slope control to suppress bus noise and eliminate ground bounce, while the WP pin provides hardware-level write protection across the full 256-byte array. The device uses on-chip HV generator and page latches to achieve 5 ms max write cycle time and 200-year data retention under industrial conditions.

Key Specifications

Pinout & Package

24FC02-I/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package (SN suffix), measuring 3.90 mm wide with 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch; A0–A2 pins are not internally connected and may be left floating or tied to VSS/VCC without functional impact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24FC02-I/SN, the 24AA02-I/SN trades 2.5× lower I²C speed for broader legacy compatibility, while AT24C02D-SSHM-T offers equivalent speed at lower unit cost but omits automotive qualification and has higher leakage - making 24FC02-I/SN optimal for time-sensitive, automotive-grade, or ultra-low-power applications.

Availability

24FC02-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and power-fail safe logging requiring stable component supply and guaranteed long-term availability.

Supply support for 24FC02-I/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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and development tools.

The 24FC02 belongs to Microchip's 24XX02 family of I²C serial EEPROMs, designed specifically for robust, low-power, and space-efficient nonvolatile data storage in resource-constrained embedded systems.

FAQ

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

The 24FC02-I/SN supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V VCC range, unlike the 24AA02 (400 kHz) or 24LC02B (400 kHz, minimum 2.5V). This allows faster configuration reads and writes in time-critical applications. At VCC < 2.5V, the 24FC02-I/SN maintains 1 MHz operation - a key differentiator confirmed in DS20001709N Table 1-2.

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

Yes, the 24FC02-I/SN requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 1 MHz operation, a 2 kΩ resistor is recommended per line to meet rise-time specifications (≤1000 ns). Pull-up voltage must match the host controller's I/O voltage level, and resistors should be placed close to the 24FC02-I/SN to minimize bus capacitance.

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

The WP pin on the 24FC02-I/SN provides hardware-level write inhibition: when tied to VCC, all write operations (byte and page) to the entire 256-byte memory array are blocked, while read operations remain fully functional. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This feature operates independently of software commands and persists across power cycles.

What is the page write capability of the 24FC02-I/SN?

The 24FC02-I/SN supports 8-byte page writes, meaning up to eight consecutive bytes can be loaded into its internal page buffer and written to memory with a single Stop condition. This reduces I²C transaction overhead versus byte-by-byte writes. Page boundaries align every 8 bytes (addresses 0x00–0x07, 0x08–0x0F, etc.), and crossing a boundary causes wraparound within the same page - requiring host firmware to manage alignment.

Is the 24FC02-I/SN qualified for automotive applications?

Yes, the 24FC02-I/SN is AEC-Q100 qualified for automotive applications. While the "I" suffix denotes Industrial temperature grade (–40°C to +85°C), Microchip explicitly lists AEC-Q100 qualification for the 24FC02 family in DS20001709N Features section. This certification covers stress testing for temperature cycling, humidity, and mechanical shock - validating suitability for under-hood and infotainment systems.