FT24C04A-UNR-T

Overview

The FT24C04A-UNR-T is a 4Kbit (512 x 8) serial EEPROM manufactured by Fremont Micro Devices Ltd. It features an I2C interface with a maximum clock frequency of 1 MHz at 5V and 400 kHz at lower voltages. The device operates on a single supply voltage ranging from 1.8V to 5.5V within the industrial temperature range of -40°C to 85°C. It utilizes an 8-pin DFN package (2x3mm) and supports page write modes with self-timed programming cycles.

Feature Summary

• Supports standard two-wire bi-directional serial communication via SDA and SCL pins.
• Includes hardware write protection through a dedicated WP pin for data security.
• Features Schmitt trigger inputs with noise filtering for signal integrity.
• Provides automatic erase-before-write functionality during programming operations.

Applications

• Data logging in low-power embedded systems
• Configuration storage for microcontrollers
• Calibration parameter retention in consumer electronics

Procurement Notes

Verify the specific suffix 'UNR' corresponds to the 8-DFN package and tape-and-reel packaging format. Confirm RoHS compliance status matches project requirements. Ensure the operating voltage range aligns with the system power rails, as performance varies between 1.8V and 5.5V thresholds.

Selection Notes

Select this component when a compact surface-mount footprint is required alongside standard I2C compatibility. Consider the 16-byte page write capability for efficient data throughput. Verify that the available address pins A2 and A1 suffice for the required bus topology, as only four devices can share the same bus line.

Part Context

This part belongs to the FT24C04A/08A/16A series of serial EEPROMs. It shares architectural similarities with other industry-standard 24Cxx devices but offers specific voltage and timing characteristics defined by Fremont Micro Devices. The UNR suffix indicates a specific package and reel configuration distinct from tube or other package variants.

Replacement Considerations

FT24C04A-ENR-T is listed as a parameter-equivalent alternative from the same manufacturer. Cross-vendor replacements require verification of pinout compatibility, specifically the Write Protect pin function and address bit configurations.

FAQ

How many FT24C04A devices can be connected to a single I2C bus?

Up to four FT24C04A devices can be wired-OR on the same bus using the A2 and A1 address pins for selection.

What is the function of the WP pin?

The WP pin provides hardware write protection. Connecting it to VCC disables all programming functions, while leaving it unconnected or connecting it to ground allows write operations.