TSC2020IRTVR

Overview

The TSC2020IRTVR is a low-power analog matrix touch screen controller from Texas Instruments, designed for handheld applications. It supports up to a 3x5 array with multi-touch detection and delivers 12-bit global resolution. The device operates on a single supply voltage ranging from 1.6V to 3.6V, enabling compatibility with single-cell battery systems. It features an I2C serial interface supporting standard, fast, and high-speed modes. Key capabilities include programmable sampling rates, auto power-down control, and on-chip temperature measurement. The component is characterized for operation within the -40°C to +85°C industrial temperature range.

Feature Summary

• Multi-touch capability supporting simultaneous detection of at least three touches on a 3x5 analog matrix sensor.
• I2C serial interface compatible with standard, fast, and high-speed communication modes.
• Ultra-low power consumption with standby mode drawing approximately 70.72µW at 1.6V (8.2kSPS equivalent rate).
• Integrated 12-bit ADC with preprocessing logic to reduce bus activity and enhance efficiency.

Applications

• Smart phones and feature phones
• Portable media players (MP3, GPS, PNDs)
• Electronic books and netbooks

Procurement Notes

Verify the specific ordering suffix against current TI documentation to confirm package type and reel quantity. The RTV designation indicates a 32-pin WQFN package. Confirm RoHS compliance status and moisture sensitivity level requirements prior to assembly planning.

Selection Notes

Select this component when designing for resistive analog matrix screens requiring multi-touch functionality in space-constrained portable devices. Ensure the host processor supports the required I2C speeds and that the system voltage falls within the 1.6V to 3.6V operating range.

Part Context

This part belongs to the TSC2020 family of touch screen controllers. It is distinct from SPI-based models like the TSC2046 by utilizing an I2C interface. The IR TVR suffix denotes the industrial temperature range (-40°C to +85°C), QFN-32 package, and tape-and-reel packaging format.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided datasheet. Designers should evaluate other TSC20xx series members or capacitive controllers if interface protocols or touch sensing technologies differ significantly.

FAQ

What is the maximum number of simultaneous touches supported?

The TSC2020 is capable of detecting at least three touches simultaneously using its internal touch engine and analog signal processing.

Does the device support multiple I2C speed modes?

Yes, the I2C interface supports Standard Mode, Fast Mode, and High-Speed Mode operations.

Is there an integrated temperature sensor?

Yes, the TSC2020 includes an on-chip temperature measurement feature accessible via the register interface.