Microchip Technology 24FC02T-E/SN

Overview

24FC02T-E/SN 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 buffering, Schmitt-trigger inputs, slope-controlled outputs, and >1 million erase/write cycles - deployed in automotive body control modules for storing calibration data and configuration parameters.

For engineers reviewing the 24FC02T-E/SN datasheet, 24FC02T-E/SN pinout, 24FC02T-E/SN application, or 24FC02T-E/SN equivalent, key selection considerations include its 1.7V–5.5V supply range, E-temp grade qualification, SOIC-8 wettable flanks package, I²C address compatibility (1010xxx0/1), and WP-pin-based full-array write protection.

Technical Context

The 24FC02T-E/SN implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control, supporting byte and page write modes with automatic internal timing. Its EEPROM array uses floating-gate technology with on-chip charge pump for programming, and includes dedicated logic for acknowledge polling during write cycles.

It integrates Schmitt-trigger inputs on SDA/SCL for noise immunity, output slope control to suppress ground bounce, and a hardware write-protect input (WP) that disables all write operations when pulled high - independent of I²C command flow or address decoding.

Key Specifications

Pinout & Package

24FC02T-E/SN is packaged in an 8-lead SOIC (SN) with wettable flanks, optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA02T-I/SN and AT24C02D-SSHM-T, the 24FC02T-E/SN uniquely delivers 1 MHz operation at 1.7V, extended temperature range, AEC-Q100 qualification, and factory programming capability - making it the only choice for safety-critical automotive and high-reliability industrial deployments requiring guaranteed performance across full thermal and voltage margins.

Availability

24FC02T-E/SN is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor nodes, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature and voltage ranges.

Supply support for 24FC02T-E/SN 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 components, and memory solutions, serving automotive, industrial, and communications markets with high-reliability silicon and design support.

The 24FC02T-E/SN belongs to Microchip's 24XX02 family of serial EEPROMs, engineered specifically for automotive and extended-temperature applications demanding robust I²C communication, low-voltage operation, and long-term data integrity.

FAQ

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

The 24FC02T-E/SN supports up to 1 MHz I²C clock frequency when VCC is between 1.7V and 5.5V. At VCC < 2.5V, the maximum clock rate remains 1 MHz - distinguishing it from the 24AA02 (limited to 100 kHz below 2.5V) and 24LC02B (limited to 400 kHz below 2.5V). This enables faster configuration loading in low-power systems without voltage scaling penalties. The 24FC02T-E/SN maintains full timing compliance per Table 1-2 AC Characteristics across its entire operating range.

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

Yes, the 24FC02T-E/SN requires external pull-up resistors on both SDA and SCL lines because it 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 - for example, with 400 pF total bus capacitance and 1 MHz clock, a 1.8 kΩ resistor achieves ~300 ns rise time per AC specs. Pull-ups must connect to the same VCC domain as the 24FC02T-E/SN to ensure valid logic levels.

How does hardware write-protection work on the 24FC02T-E/SN?

Hardware write-protection on the 24FC02T-E/SN is controlled solely by the WP pin: when tied to VCC, all write operations (byte, page, and erase) to the entire 256-byte memory array are disabled, while read operations remain fully functional. No I²C command or software sequence can override this state. The 24FC02T-E/SN ignores all write attempts and does not generate ACK for write addresses during WP = high. This provides fail-safe protection against firmware bugs, EMI-induced bus errors, or unauthorized updates - a critical feature for automotive and medical applications.

Is the 24FC02T-E/SN pin-compatible with other 24XX02 family members in SOIC-8 package?

Yes, the 24FC02T-E/SN is pin-compatible with 24AA02T-I/SN and 24LC02BT-I/SN in the SOIC-8 (SN) package: all share identical pinout (VCC, WP, SCL, SDA, VSS, A0–A2), mechanical dimensions, and footprint. However, A0–A2 are no-connect pins across the family and may be left floating. Functional compatibility requires verifying voltage range, clock speed, and temperature grade - for example, substituting 24FC02T-E/SN for 24AA02T-I/SN enables 1 MHz operation and +125°C support without PCB changes.

What is the purpose of the A0, A1, and A2 pins on the 24FC02T-E/SN?

The A0, A1, and A2 pins on the 24FC02T-E/SN are not internally connected and serve no functional purpose. They may be left floating, tied to VSS, or tied to VCC without affecting device operation. This differs from higher-density EEPROMs (e.g., 24FC1025) where these pins encode I²C slave address bits. In the 24FC02T-E/SN, the 7-bit I²C address is fixed as 1010xxx (where xxx are "don't care" bits), so A0–A2 have no address-selection role and introduce zero routing constraints on the PCB layout.