at42qt5320 Quantum Research Group, at42qt5320 Datasheet - Page 4

• Manufacturer Part Number: at42qt5320
• Description: Qtwo? 10-bit Touchscreen Controller
• Manufacturer: Quantum Research Group

1.3
Figure 1-1.
4
Vunreg
ADDRESS SELECT
Follow regulator manufacturer's recommended values
for input and output bypass capacitors (Creg).
FORCE SENSOR
Schematic
QT5320
I2C
TRIGGER
CHANGE
Creg
Typical Circuit
SDA
SCL
VREG
Rp
Rp
Creg
VDD
VDD
Suggested regulator manufacturers:
• Torex (XC6215 series)
• Seiko (S817 series)
• BCDSemi (AP2121 series)
Rp
VDD
QT5320
Rs3
Rx7
Rx3
Rs2
Add two 100nF capacitors: one close to pins 4 and 6,
and another close to pins 18 and 20.
Rs1
Rx6
Rx2
Rs0
Rx1
Rx5
Cs0
Cs1
Cs2
Cs3
NOTES:
1) The central pad on the underside of the chip
2) It is important to place all Cs, Rs, Rx and Ry
3) Leave YnA, YnB unconnected if not used.
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.
Rx0
Rx4
Ry0
Ry1
Ry2
Ry3
9509AS–AT42–10/08