Rainbow Electronics AT42QT5320 - Manual (Page 4)

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