Resistive Type Touch Screen Control IC - BU21021GUL

BU21021GUL is a resistive touch screen controller,which is capable of detecting 2 points touch with alegacy 4-wire resistive touch screen. BU21021GUL iscapable of detecting X/Y coordinates, touch pressure in1 point detection mode, and a pair of X/Y coordinates in2 point detection mode.
It is also capable of recognizing multiple finger gesturesfrom coordinate data variation and notifying to host withgesture detection flags respectively.
BU21021GUL employs embedded CPU for noisefiltering, coordinate calculation, gesture detection andother signal processing required on a chip.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BU21021GUL-E2 Active VCSP50L2 3000 3000 Taping Yes
Vcc(Min.)[V] 2.7
Vcc(Max.)[V] 3.6
MCU 32bit
Resolution 4096 x 4096
Stand-by current[µA] 60.0
Host I/F I2C / SPI
Operating Temperature (Min.)[°C] -20
Operating Temperature (Max.)[°C] 85
  • ・ Legacy 4-wire resistive touch screen is applicable
    ・ 1 point / 2 points touch detection
    ・ On chip coordinate generation
    ・ Multiple gesture detections
    ・ 3V single power supply
    ・ Higher coordinate resolution with 12-bit SAR A/D converter
    ・ On chip clock generator
    ・ Selectable HOST I/F(IFSEL pin) 4-wire SPI / 2-wire serial bus
Technical Data
Application Note

Thermal Resistance

NE Handbook Series

Sensor Networks