at42qt4120 Quantum Research Group, at42qt4120 Datasheet - Page 3

• Manufacturer Part Number: at42qt4120
• Description: Qfield? 10-bit Touchscreen Sensor Ic
• Manufacturer: Quantum Research Group

1.3
Figure 1-1.
9506AS–AT42–10/08
I C-COMPATIBLE
2
Vunreg
Wiring Diagram
ADDRESS SELECT
I C-COMPATIBLE
2
Wiring Diagram
CHANGE
SDA
SCL
VREG
Suggested regulator manufacturers:
Rp
VDD
• Torex (XC6215 series)
• Seiko (S817 series)
• BCDSemi (AP2121 series)
Rc
VDD
Rp
VDD
CHANGE
QT4120
and output bypass capacitors; keep output capacitor close to
pins 4 and 6. If not possible, add a 100nF capacitor next to those pins.
follow regulator manufacturer's recommended values for input
N/C
N/C
N/C
N/C
N/C
N/C
Rx3
Rs2
Rs1
Rx2
Rs0
Rx1
Cs0
Cs1
Cs2
NOTES:
1) The central pad on the underside of the chip
2) It is important to place all Cs, Rs, Rx and Ry
Rx0
components physically near to the chip.
is a Vss pin and should be connected to ground.
Do not put any other tracks underneath
the body of the chip.
Ry0
Ry1
Ry2
AT42QT4120
3