ROHM Semiconductor Supplier Page

Resistive Touchscreen Controller ICs


Supports dual-touch gesture sensing without external resistors


The BU21023 series of high-speed, high noise immunity, low-voltage resistive touchscreen controllers is now available from ROHM Semiconductor. These new controllers are the industry's first to enable multi-touch (two-point) operation and intuitive gesture control, including pinching, spreading and, rotating - previously possible only with more expensive capacitive touch systems.

This series of ICs integrate a dedicated analog circuit and CPU for precise two-point coordinate and gesture detection. A calibration function is also built-in which minimizes the effects of panel variations during production as well as fluctuations in touchscreen device characteristics caused by temperature variations or time-based degradation.
Resistive Touchscreen Controller ICs

Features  
  • 4-wire resistive touch screen interface
  • 3.0 V single power supply
  • 4-wire SPI interface / 2-wire serial interface
  • Selectable download way of CPU firmware
    (Host or EEPROM)
  • Two points and gesture detection

Digi-Key P/N Packaging Manufacturer P/N Description  
BU21023GUL-E2CT-ND Cut Tape BU21023GUL-E2 IC CTLR TOUCH PAN VCSP Datasheet
BU21023GUL-E2DKR-ND Digi-Reel® IC CTLR TOUCH PAN VCSP
BU21023GUL-E2TR-ND Tape & Reel IC LINEAR
BU21023MUV-E2CT-ND Cut Tape BU21023MUV-E2 IC CTLR TOUCH PANEL 28VQFN Datasheet
BU21023MUV-E2DKR-ND Digi-Reel® IC CTLR TOUCH PANEL 28VQFN
BU21023MUV-E2TR-ND Tape & Reel IC LINEAR