FTCSU564

Overview

The FTCSU548 is a controller IC designed for NKK Series FT 5-Wire Analog Touch Screens. It features a 10-bit A/D converter and supports both asynchronous serial interface and USB 2.0 Full Speed communication. The device operates on a typical supply voltage of 3.3V or 5.0V, with USB functionality restricted to 5.0V. Rated output current is ±170mA per level, and the operation frequency is 16MHz. Packaged in an LFQFP 48-pin format, it enables touch panel coordinate detection by converting analog voltage levels into digital data.

Feature Summary

• Integrated 10-bit A/D converter for precise coordinate detection
• Dual interface support: Asynchronous Serial and USB 2.0 Full Speed
• LFQFP 48-pin package design
• Compatible with NKK Series FT 5-Wire Analog Touch Screens

Applications

• Industrial control panels requiring mouse-like input functionality
• Medical equipment interfaces
• Automotive display systems

Procurement Notes

Verify that the specific application requires the FTCSU548 IC rather than a pre-assembled controller board like the FTCS05B or FTCU05B. Confirm interface requirements (Serial vs. USB) and ensure the host system can handle the 16MHz operation frequency. Check for ESD protection needs during handling.

Selection Notes

Select this component when designing a custom controller board for 5-wire resistive touch screens. Ensure the power supply matches the 3.3V/5.0V requirement and that the PCB layout accommodates the LFQFP 48-pin package dimensions. Verify compatibility with the target operating system drivers if using the USB interface.

Part Context

The FTCSU548 serves as the core processing unit within NKK's ecosystem for 5-wire touch screens. It replaces the need for external logic chips by integrating the A/D conversion and communication protocols directly. It is distinct from the complete controller boards (FTCS05B/FTCU05B) which include additional connectors and circuitry.

Replacement Considerations

No direct public substitute part numbers are listed. Custom designs must replicate the LFQFP 48-pin footprint and interface timing specifications.

FAQ

What is the maximum rated output current for the FTCSU548?

The high-level output current is -170mA and the low-level output current is +170mA.

Does the FTCSU548 support simultaneous multi-touch?

No, the documentation states that analog types read the center point between two touch points; software should not be created for simultaneous touch points.

What is the operating temperature range for the FTCSU548?

The operating temperature range is –20°C to +85°C.