Microchip Technology 24FC02T-E/ST

Overview

24FC02T-E/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 extended temperature operation (-40°C to +125°C). It features 8-byte page write buffer, Schmitt-trigger inputs, slope-controlled outputs, and >1 million erase/write cycles - deployed in automotive body control modules for storing calibration data and configuration settings.

For engineers reviewing the 24FC02T-E/ST datasheet, 24FC02T-E/ST pinout, 24FC02T-E/ST application, or 24FC02T-E/ST equivalent, key selection criteria include its 1.7V–5.5V supply range, E-temp qualification, SOIC-8 wettable flanks package, and I²C timing compliance at 1 MHz under extended temperature conditions.

Technical Context

The 24FC02T-E/ST 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 resets on each new word address command.

It uses an on-chip HV generator for EEPROM programming, integrates noise-suppressing Schmitt triggers on SDA/SCL, and enforces strict bus timing - including 250 ns minimum TAA (output valid) and 250 ns maximum TOF (output fall time) at 1.7V–5.5V and -40°C to +125°C.

Key Specifications

Pinout & Package

24FC02T-E/ST is supplied in an 8-lead SOIC package with wettable flanks (ST suffix), optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02T-I/ST and AT24C02D-SSHM-T, the 24FC02T-E/ST uniquely delivers 1 MHz operation *plus* AEC-Q100 Extended temperature qualification in the same wettable-flanks SOIC-8 package - making it the only drop-in option for next-generation automotive ECUs requiring both speed and ruggedness.

Availability

24FC02T-E/ST is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.

Supply support for 24FC02T-E/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 leading provider of microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.

The 24FC02 belongs to Microchip's 24XX02 family of serial EEPROMs engineered specifically for automotive and extended-temperature applications requiring high reliability, low-voltage operation, and robust I²C interoperability.

FAQ

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

The 24FC02T-E/ST supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range and -40°C to +125°C operating temperature. This is confirmed in Table 1-2 of DS20001709N, where FCLK is specified as 1000 kHz for 1.7V ≤ VCC ≤ 5.5V under Extended temperature conditions. The 24FC02T-E/ST achieves this speed while maintaining full AC timing compliance, unlike the 24AA02 or 24LC02B variants.

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

Yes, the 24FC02T-E/ST requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Section 2.2 of DS20001709N specifies typical values of 2 kΩ for 1 MHz operation. The exact value depends on bus capacitance and rise-time requirements; for a 100 pF bus, a 2.2 kΩ resistor ensures TR ≤ 1000 ns per Table 1-2.

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

On the 24FC02T-E/ST, the WP pin provides hardware-level write inhibition: when tied to VCC, the entire 256-byte memory array is locked against write or erase operations, while reads remain fully functional. When tied to VSS, normal read/write access is enabled. This behavior is identical across all 24XX02 variants and is implemented independently of firmware - ensuring protection even during MCU reset or failure.

Is the 24FC02T-E/ST AEC-Q100 qualified, and what grade does it meet?

Yes, the 24FC02T-E/ST is AEC-Q100 qualified per the "Automotive AEC-Q100 Qualified" feature list in DS20001709N. Its "E" suffix denotes Extended temperature grade (-40°C to +125°C), and the device meets stress test requirements for Grade 1 (125°C ambient) per AEC-Q100-002 and AEC-Q100-004. This qualification is explicitly stated in the Features section and Device Selection Table.

What package type does the "ST" suffix indicate for the 24FC02T-E/ST?

The "ST" suffix in 24FC02T-E/ST denotes an 8-lead SOIC package with wettable flanks - a surface-mount variant designed for enhanced solder joint inspection via automated optical inspection (AOI). Per Microchip's Package Marking Information table (DS20001709N, page 16), "ST" is listed under I-Temp and E-Temp columns for SOIC, confirming its use for both temperature grades and its compatibility with automotive reflow and inspection standards.