Microchip Technology 24FC02T-E/MS

Overview

24FC02T-E/MS from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, supporting 1.7V–5.5V operation, 1 MHz clock frequency (at full V_CC), and extended temperature range (–40°C to +125°C). It features hardware write-protection via the WP pin, 8-byte page write buffer, and Schmitt-trigger inputs for noise immunity-used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the 24FC02T-E/MS datasheet, 24FC02T-E/MS pinout, 24FC02T-E/MS application, or 24FC02T-E/MS equivalent, key selection criteria include its 1 MHz I²C speed at 1.7V+, extended-temp qualification, low 1 µA standby current (I-temp) / 3 µA (E-temp), and MSOP-8 wettable flank package compatibility with automated optical inspection.

Technical Context

The 24FC02T-E/MS implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control, supporting byte and page write modes with self-timed erase/write cycles. Its internal Address Pointer enables sequential, random, and current-address read operations without external address latching.

It integrates Schmitt-trigger inputs on SDA/SCL, output slope control to suppress ground bounce, and an internal HV generator for EEPROM programming. Write protection is implemented via dedicated WP pin logic that disables all write commands when pulled high, independent of I²C transaction state.

Key Specifications

Pinout & Package

24FC02T-E/MS is supplied in an 8-lead MSOP package (Micro Small Outline Package) with wettable flanks, optimized for automated optical inspection (AOI) and solder joint reliability in high-volume manufacturing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24FC02T-E/MS, the 24AA02T-I/MS trades 1 MHz speed and extended temperature for lower cost, while AT24C02D-SSHM-T offers alternate sourcing but omits automotive qualification and high-temp reliability assurance.

Availability

24FC02T-E/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and medical device settings backup requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

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

The 24FC02T-E/MS belongs to Microchip's 24XX02 family of serial EEPROMs, designed specifically for reliable, low-voltage, high-speed nonvolatile data storage in space-constrained embedded systems.

FAQ

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

The 24FC02T-E/MS supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V V_CC range. This fast-plus mode capability enables higher throughput than legacy 400 kHz EEPROMs and reduces write latency in time-critical applications. The 24FC02T-E/MS achieves this without requiring elevated V_CC, unlike the 24LC02B which is limited to 400 kHz below 2.5V. This makes the 24FC02T-E/MS uniquely suited for modern low-voltage microcontroller interfaces.

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

Yes, the 24FC02T-E/MS 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, V_CC, and desired rise time; Microchip recommends verifying against AC timing specs (e.g., TR ≤ 1000 ns at 1.7V). Failure to install appropriate pull-ups will prevent proper I²C communication and cause bus lockup or NACK responses. The 24FC02T-E/MS itself does not integrate internal pull-ups.

How does the WP pin function on the 24FC02T-E/MS?

The WP (Write-Protect) pin on the 24FC02T-E/MS is an active-high logic input that disables all write operations-including byte write, page write, and write cycle initiation-when pulled to V_CC. When tied to V_SS, normal read/write access is enabled. WP operates independently of I²C protocol state and takes effect immediately, providing hardware-level security against unintended writes during power-up, brown-out, or firmware errors. This behavior is confirmed in the DS20001709N datasheet Section 2.4 and applies identically across all 24XX02 variants including the 24FC02T-E/MS.

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

Yes, the 24FC02T-E/MS is AEC-Q100 qualified and meets Grade 1 requirements (–40°C to +125°C ambient operating temperature). This qualification is explicitly stated in the DS20001709N datasheet Features section and validated through stress testing including HTOL, TCT, and ESD per AEC-Q100 Rev-H. The "E" suffix in 24FC02T-E/MS denotes Extended temperature grade, and the "T" indicates tape-and-reel packaging. This makes the 24FC02T-E/MS suitable for automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is mandatory.

Can the 24FC02T-E/MS be used interchangeably with the 24LC02B in existing designs?

No, the 24FC02T-E/MS is not a drop-in replacement for the 24LC02B due to key functional differences: the 24FC02T-E/MS supports 1 MHz I²C at 1.7V, while the 24LC02B is limited to 400 kHz below 2.5V and requires ≥2.5V for full-speed operation. Additionally, the 24FC02T-E/MS has higher standby current (3 µA vs. 1 µA) in extended temperature range and different AC timing parameters. Although pinout and basic I²C protocol are identical, firmware timing margins and voltage rail design must be revalidated. The 24FC02T-E/MS should be treated as a performance upgrade-not a direct substitute-for the 24LC02B.