FTCSU548

Overview

The FTCSU548 is a touch screen controller IC from the NKK Switches FT series, designed for integration with analog touch panels. It supports both asynchronous serial communication and USB Full Speed 2.0 interfaces. The device operates on a supply voltage of 3.3V or 5.0V and features a 10-bit A/D converter resolution. It is housed in an LQFP-48 package and supports an operation frequency of up to 16 MHz. The component is rated for an operating temperature range of –20°C to +85°C.

Feature Summary

• Dual interface capability supporting RS232C (Serial) and USB 2.0 Full Speed
• Integrated 10-bit A/D converter for coordinate detection
• Built-in EPROM for saving setting data and calibration information
• Compatible with Windows 7, 8, Vista, and XP operating systems via drivers

Applications

• Industrial control panels requiring mouse-like input functionality
• Medical equipment displays needing reliable touch interaction
• Automotive infotainment and monitoring systems
• Point-of-sale (POS) terminals and kiosks

Procurement Notes

Verify that the specific application requires either the Serial or USB interface variant, as the FTCSU548 serves as the core IC for both FTCS04B (RS232C) and FTCU04B (USB) controller boards. Ensure compatibility with the host operating system drivers provided by NKK Switches. Confirm power supply requirements match the 3.3V or 5.0V specifications before integration.

Selection Notes

Select the FTCSU548 when designing custom controllers for 4-wire analog touch screens. It is suitable for applications requiring high-speed data transmission via USB or standard serial communication. Consider the LQFP-48 package size for PCB layout constraints. Verify that the environmental conditions fall within the –20°C to +85°C operating range.

Part Context

The FTCSU548 is the central processing unit for NKK's Series FT 4-Wire Touch Screens with Printed Tails. It works in conjunction with resistive touch panels to detect coordinates and transmit them to a host computer. It replaces traditional mouse inputs in various electronic devices, offering a direct touch interface solution.

Replacement Considerations

No direct replacement part numbers are documented in the provided datasheet. For equivalent functionality, consult NKK Switches engineering support for current product line updates or alternative ICs within the same family.

FAQ

What is the maximum operation frequency of the FTCSU548?

The FTCSU548 supports an operation frequency of up to 16 MHz.

Does the FTCSU548 support simultaneous multi-touch?

No. The datasheet specifies that software should not be created for simultaneous touch points, as the analog type will read the center point between two touch points.

What is the A/D converter resolution of the FTCSU548?

The FTCSU548 features a 10-bit A/D converter resolution.

Can the FTCSU548 operate without a controller board?

The IC is designed to work with controller boards (such as FTCS04B or FTCU04B) or custom designs. It recognizes touch positions via analog voltage and outputs coordinate values through its interface.