Microchip Technology 24FC02T-I/MS

Overview

24FC02T-I/MS 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 operation (–40°C to +85°C) in an 8-lead MSOP package. It delivers low-power operation (1 µA standby, 1 mA read), 8-byte page write buffer, and >1 million erase/write cycles for embedded system configuration storage.

For engineers reviewing the 24FC02T-I/MS datasheet, 24FC02T-I/MS pinout, 24FC02T-I/MS application, or 24FC02T-I/MS equivalent, key selection criteria include its 1 MHz I²C speed at 1.7V, WP-enabled hardware-level memory protection, extended temperature capability, and compatibility with space-constrained MSOP layouts in automotive and industrial control modules.

Technical Context

The 24FC02T-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while ACK polling enables precise timing of write-cycle completion without fixed delays.

It uses on-chip high-voltage generation for EEPROM programming and features a self-timed erase/write cycle with 5 ms maximum page write time. The device ignores A0–A2 pins-no external address selection-and relies solely on the fixed 7-bit client address '1010xxx' with R/W bit control.

Key Specifications

Pinout & Package

8-Lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed thermal pad option (not electrically connected). Pin 1 marked via notch or bevel; pin 1 = A0 (NC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02T-I/MS, the 24FC02T-I/MS enables faster configuration writes and maintains full functionality at 1.7V, while AT24C02D-MAHM-T extends temperature range at the cost of Microchip-specific qualification and support infrastructure.

Availability

24FC02T-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body controllers, medical device configuration, and IoT edge node identity applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for 24FC02T-I/MS 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, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24FC02T-I/MS belongs to Microchip's 24XX02 family of serial EEPROMs, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the 24FC02T-I/MS?

The 24FC02T-I/MS supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range. This is confirmed in Table 1-2 of DS20001709N, where FCLK is specified as 1000 kHz for 1.7V ≤ VCC ≤ 5.5V. Unlike the 24AA02 or 24LC02B variants, the 24FC02T-I/MS maintains this speed even at minimum 1.7V operation, making it optimal for high-throughput configuration updates in low-voltage systems.

Does the 24FC02T-I/MS require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC02T-I/MS requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Section 2.2 of DS20001709N specifies a typical 2 kΩ pull-up for 1 MHz operation. The exact value depends on bus capacitance and desired rise time, but 2 kΩ is recommended for standard 1 MHz I²C timing compliance with the 24FC02T-I/MS.

How does the Write-Protect (WP) pin function on the 24FC02T-I/MS?

The WP pin on the 24FC02T-I/MS provides hardware-level write inhibition: when tied to VCC, the entire 256-byte memory array (addresses 00h–FFh) becomes read-only; when tied to VSS, full read/write access is enabled. This behavior is explicitly defined in Section 2.4 and Figure 6-3 of DS20001709N and applies regardless of I²C command sequence - no software register setting is involved.

Is the 24FC02T-I/MS AEC-Q100 qualified?

Yes, the 24FC02T-I/MS is AEC-Q100 qualified for automotive applications. The datasheet DS20001709N states "Automotive AEC-Q100 Qualified" in the Features section on page 1, and the "Device Selection Table" confirms that the 24FC02 variant supports both Industrial (I) and Extended (E) temperature ranges - a prerequisite for AEC-Q100 Grade 2 (–40°C to +105°C) and Grade 3 (–40°C to +125°C) compliance.

What is the page write capability of the 24FC02T-I/MS?

The 24FC02T-I/MS supports an 8-byte page write buffer, allowing up to eight consecutive bytes to be written in a single I²C transaction. As stated in the Features list and Section 6.2, this reduces bus overhead and accelerates multi-byte updates. Page boundaries align every 8 bytes (e.g., 00h–07h, 08h–0Fh), and crossing a boundary causes wraparound within the same page - software must manage alignment to avoid unintended overwrites.