Microchip Technology 24FC02T-E/OT

Overview

24FC02T-E/OT 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), 8-byte page write buffer, and extended temperature operation from –40°C to +125°C. It enables nonvolatile data storage in space-constrained industrial sensors and automotive control modules.

For engineers reviewing the 24FC02T-E/OT datasheet, 24FC02T-E/OT pinout, 24FC02T-E/OT application, or 24FC02T-E/OT equivalent, key selection criteria include its 1.7V–5.5V supply range, 1 µA standby current (E-temp), 5 ms max write cycle time, Schmitt-trigger inputs for noise immunity, and compatibility with I²C bus speeds up to 1 MHz at full V_CC.

Technical Context

The 24FC02T-E/OT implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control, supporting byte and page write modes. Its internal Address Pointer auto-increments during sequential reads and random access operations.

It features an on-chip HV generator for EEPROM programming, page latches for buffered writes, and dedicated I/O control logic that enforces SDA/SCL timing constraints-including 250 ns min fall time, 450 ns output valid delay, and 250 ns input filter spike suppression-to ensure robust operation on noisy buses.

Key Specifications

Pinout & Package

24FC02T-E/OT is packaged in a 5-lead SC-70 (Microchip package code LT), measuring 2.00 mm × 1.25 mm × 0.80 mm, with wettable flank capability for automated optical inspection (AOI) and reliable solder-joint quality verification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24FC02T-E/OT, the 24AA02T-I/OT trades speed and temperature range for lower cost, while the AT24C02D-SSHM-T offers equivalent thermal performance without automotive validation-making the 24FC02T-E/OT the only choice when AEC-Q100 compliance and 1 MHz I²C throughput are mandatory.

Availability

24FC02T-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device identification, and smart energy meter firmware logging requiring stable component supply and long-term lifecycle assurance.

Supply support for 24FC02T-E/OT 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, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and development tools.

The 24FC02T-E/OT belongs to Microchip's 24XX02 family of serial EEPROMs, designed specifically for reliable, low-power, and space-efficient nonvolatile storage in harsh-environment embedded systems requiring guaranteed data integrity over decades.

FAQ

What is the maximum I²C clock frequency supported by the 24FC02T-E/OT?

The 24FC02T-E/OT supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range. At V_CC < 2.5V, the maximum clock rate remains 1 MHz-unlike the 24AA02 or 24LC02B, which drop to 100 kHz below 2.5V. This makes the 24FC02T-E/OT uniquely suited for high-speed low-voltage I²C implementations where timing margin is critical.

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

Yes, the 24FC02T-E/OT requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 2 kΩ for 1 MHz operation and 10 kΩ for 100 kHz. The exact value depends on bus capacitance and desired rise time; Microchip recommends verifying with the AC characteristics table in DS20001709N.

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

When the WP pin of the 24FC02T-E/OT is tied to V_CC, all write operations (byte and page) to the entire 256-byte memory array are inhibited; read operations remain fully functional. When tied to V_SS, normal read/write access is enabled. The pin has no internal pull-up/down and must be actively driven.

Is the 24FC02T-E/OT pin-compatible with other 24XX02 family members in the SC-70 package?

Yes, the 24FC02T-E/OT shares identical 5-lead SC-70 (LT) pinout and footprint with 24AA02T-I/OT and 24LC02BT-E/OT. All three use SCL, SDA, WP, V_SS, and V_CC in the same physical arrangement, enabling drop-in substitution where speed, temperature, and qualification requirements align.

What is the endurance specification for the 24FC02T-E/OT, and how is it tested?

The 24FC02T-E/OT guarantees 1,000,000 erase/write cycles at 25°C and 5.5V in page mode, as specified in Table 1-2, Note 4 of DS20001709N. This endurance is ensured by characterization-not 100% production tested-but validated across process corners and temperature extremes to meet automotive and industrial reliability standards.