Microchip Technology 24FC02T-E/OT36KVAO

Overview

24FC02T-E/OT36KVAO from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection, 1 MHz maximum clock frequency, and operation down to 1.7V. It supports page writes (up to 8 bytes), delivers ≤1 µA standby current at extended temperature, and is qualified for automotive AEC-Q100 applications including vehicle control modules.

For engineers reviewing the 24FC02T-E/OT36KVAO datasheet, 24FC02T-E/OT36KVAO pinout, 24FC02T-E/OT36KVAO application, or 24FC02T-E/OT36KVAO equivalent, key selection criteria include its 1.7V–5.5V supply range, 125°C extended temperature rating, 1 MHz I²C timing compliance, Schmitt-trigger noise immunity, and TDFN-8 (3×2 mm) package footprint compatibility with space-constrained embedded systems.

Technical Context

The 24FC02T-E/OT36KVAO implements a 2-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 architecture includes an 8-byte page latch buffer, address pointer auto-increment logic, and HV generator for EEPROM cell programming.

It features Schmitt-trigger inputs on SDA/SCL with ≥50 ns spike suppression, output slope control to minimize ground bounce, and hardware write-protection via dedicated WP pin-enabling full-array (00h–FFh) lock when pulled high. The device operates across -40°C to +125°C with guaranteed 1 million endurance cycles and >200 years data retention.

Key Specifications

Pinout & Package

24FC02T-E/OT36KVAO is packaged in an 8-lead TDFN (3×2 mm, 0.5 mm pitch) with exposed pad. Pin 1 is top-left corner (marked dot); exposed pad is electrically connected to VSS and must be soldered for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02T-I/OT and AT24C02D-SSHM-T, the 24FC02T-E/OT36KVAO uniquely combines 1 MHz speed, 1.7V operation, AEC-Q100 Grade 1 qualification, and TDFN-8 packaging-making it the sole option for space-constrained, high-reliability automotive and industrial designs requiring fast, low-voltage EEPROM access.

Availability

24FC02T-E/OT36KVAO is available at Aetrix Electronics and suitable for automotive body control units, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24FC02T-E/OT36KVAO 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 24FC02 belongs to Microchip's serial EEPROM product line, engineered specifically for robust, low-power nonvolatile storage in automotive, industrial, and medical systems where reliability, small footprint, and extended temperature operation are mandatory.

FAQ

What is the maximum I²C clock frequency supported by the 24FC02T-E/OT36KVAO?

The 24FC02T-E/OT36KVAO supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range and -40°C to +125°C temperature range. This is confirmed in Table 1-2 of DS20001709M, where FCLK = 1000 kHz is specified for 24FC02 under extended temperature conditions. At lower voltages (<2.5V), timing parameters adjust accordingly but remain compliant with standard I²C specifications.

Does the 24FC02T-E/OT36KVAO require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC02T-E/OT36KVAO requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. The datasheet recommends 2 kΩ for 1 MHz operation, 10 kΩ for 100 kHz, and values scaled for intermediate speeds. Pull-ups must connect to the same VCC rail used by the device to ensure proper logic levels and noise margin.

How does the Write-Protect (WP) pin function on the 24FC02T-E/OT36KVAO?

The WP pin on the 24FC02T-E/OT36KVAO is an active-high hardware lock: when tied to VCC, the entire 256-byte memory array (addresses 00h–FFh) becomes write-protected while reads remain fully functional. When tied to VSS or left floating, normal read/write operation is enabled. This provides fail-safe protection against accidental writes during power transitions or firmware errors.

Is the 24FC02T-E/OT36KVAO AEC-Q100 qualified, and what grade does it meet?

Yes, the 24FC02T-E/OT36KVAO is AEC-Q100 qualified and meets Grade 1 requirements (-40°C to +125°C ambient temperature). This is explicitly stated in the "Features" section of DS20001709M and confirmed in the Device Selection Table where "24FC02" lists "Automotive AEC-Q100 Qualified" and "E" (Extended) temperature range. Grade 1 certification validates its suitability for under-hood automotive applications.

What package type is used for the 24FC02T-E/OT36KVAO, and are the A0–A2 pins functional?

The 24FC02T-E/OT36KVAO uses an 8-lead TDFN (Thin Dual Flat No-lead) package measuring 3×2 mm with 0.5 mm pitch and an exposed thermal pad. Per Table 2-1 and Section 2.1 of DS20001709M, the A0, A1, and A2 pins are not internally connected-they are NC (no connect) and may be left floating or tied to VSS/VCC without affecting device operation or addressing.