Datasheet
7
9596A–AT42–10/10
AT42QT1070
Figure 1-3. Typical Circuit – Comms (20-pin VQFN)
Figure 1-4. Typical Circuit – Standalone (20-pin VQFN)
Rs6
C1
K4
Rs5
Rs4
Rs3
Rs2
Rs1
K3
K2
K1
9
QT1070
SCL
15
SDA
12
RESET
13
CHANGE
14
KEY6
16
KEY5
17
KEY4
1
KEY3
2
KEY2
3
KEY1
4
KEY0
5
8
Vss
Rs0
K0
Vss
Vdd
K5
K6
R
SCL
Vdd
Vdd
Vss
11
MODE (Vss)
N/C
N/C
18
N/C
19
N/C
20
N/C
7
N/C
6
10
CHANGE
SDA
RESET
R
SDA
Vdd
R
CHG
R
RST
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 Rs components physically near
to the chip.
Rs
OUT2
K4
Rs
OUT3
RL
OUT1
Rs4
Rs3
Rs2
Rs1
K3
K2
K1
OUT0
12
RESET
13
OUT4
14
OUT3
15
OUT2
16
OUT1
17
KEY4
1
KEY3
2
KEY2
3
KEY1
KEY0
5
Vss
Rs0
K0
R
OUT4
RESET
C
OUT1
C
OUT2
C
OUT3
Vss
C
OUT4
C
OUT0
8
QT1070
Vss
OUTPUTS
OUTPUTS
N/C
N/C
18
N/C
19
N/C
20
N/C
7
N/C
6
10
4
R
OUT0
Vss
C1
9
Vss
Vdd
Vdd
MODE (Vdd)
11
C and are optionalOUT1 2 3,
C and are optionalOUT0 4
R1
Vdd
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 Rs components physically near
to the chip.