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UR7HCTS2-U860

High-Performance USB Touch Screen Controller / Digitizer

Semtech Corporation 

ScreenCoderTM UR7HCTS2-U860

High-Performance USB

Touch Screen Controller / Digitizer

HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODERTM FAMILY

DESCRIPTION

The ScreenCoderTM USB IC is the

first single IC that seamlessly

interfaces ANY 4- or 8-wire

resistive touch screen to a USB-

equipped system. It is also the

first touch screen controller IC on

the market designed to

accommodate a very wide range of

size, capacitance and resistance of

4- or 8-wire touch screens,

providing a universal performance

solution among different OEM

products and touch screen

vendors. This unique feature of the

IC provides OEMs with a wide

variety of interchangeable touch

screen options.

Unlike digitizers, the

ScreenCoderTM USB integrates a

digitizer with a controller that

performs all touch detection, noise

filtering, error elimination and

provides the host with processed

and stable positioning data over

USB. Semtech’s unique motion

algorithms provide high resistance

to RF and other noise sources

resulting in precise, non-jittery

cursor control.

Ideal application for the

ScreenCoderTM USB include

portable devices, interactive kiosks

and industrial / custom displays

with integrated touch screens.

The universal features of the

ScreenCoderTM USB, as

implemented in both the system

and the sensor interface, reduce

the development effort and cost of

touch input based systems. The

ScreenCoderTM USB is available in

a slim, 36-pin SSOP package.

FEATURES

• Controller & digitizer in a single IC

• Interfaces the system via USB

• Works with ANY 4- or 8-wire

resistive touch screen regardless

of size, material or vendor

• Provides high resolution - 1000

points per axis, enabling IC to

make precise drawing and

signature captures

• Accurate, quick touch response

due to Semtech’s advanced

sampling technology and

algorithms

• Highly resistant to RF and other

noise

• No digitizer or external A/D

necessary

• Fully compliant with USB HID

specifications; works with native

USB drivers including Windows®

98, Me and 2000

• Convienent calibration applet

offered free of charge

• Uses slim 36-pin, SSOP package

• Customized versions available

APPLICATIONS

• Handhelds/Notebooks

• Portable Devices

PIN ASSIGNMENTS

• Interactive Kiosks

• Industrial/Custom Touch Screens

1

RSVD1

RSVD2

RSVD3

SXL

SYT

SYB

SXR

RSVD4

RSVD5

RSVD6

RSVD7

VREF

_RESET

VSS2

VDD

OSCIN

_OSCOUT

VSS

18

36-pin SSOP

36

D+

D-

_RB

RSVD13

XR2

YB2

YT2

XL2

RSVD12

RSVD11

USBV

RSVD10

RSVD9

RSVD8

XL1

YT1

YB1

XR1

19

ScreenCoder, MouseCoder are trademarks of

Semtech Corp. All other trademarks belong to

their respective companies.

Copyright Semtech 2000-2001

1

DOC7-TS2-U860-DS-101

www.semtech.com

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