at42qt1040 ATMEL Corporation, at42qt1040 Datasheet - Page 2

• Manufacturer Part Number: at42qt1040
• Description: Qtouch? 4-key Sensor Ic
• Manufacturer: ATMEL Corporation

1. Pinout and Schematic
1.1
Table 1-1.
2
* Option resistor should always be fitted even if channel is unused and Cs capacitor is not fixed.
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
I/O
Pinout Configuration
AT42QT1040
SNSK1
SNSK0
SNSK3
SNSK2
CMOS input and output
Name
SNS2
SNS1
SNS0
OUT0
OUT1
OUT3
OUT2
SNS3
Pin Listing
N/C
N/C
Vss
Vdd
N/C
N/C
N/C
N/C
Type
OD
OD
OD
OD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
–
–
P
P
–
–
–
–
SNSK1
SNSK0
SNS2
SNS1
SNS0
Sense pin and
Sense pin and
Supply ground
option detect
option detect
Sense pin
Sense pin
Sense pin
Sense pin
Sense pin
Sense pin
Function
1
2
3
4
5
Power
Out 0
Out 1
Out 3
Out 2
20
6
–
–
–
–
–
–
19
QT1040
7
OD
18
8
17
9
CMOS open drain output
Notes
To Cs2
To Cs1 and option resistor + key
To Cs1
To Cs0 and option resistor + key
To Cs0
Alternative function: Debug CLK
Alternative function: Debug DATA
To Cs3 + key
To Cs3
To Cs2 + key
16
10
15
14
13
12
11
SNSK3
OUT2
OUT3
OUT1
OUT0
P
Ground or power
If Unused...
Leave open
Connect to option resistor*
Leave open
Connect to option resistor*
Leave open
–
–
–
–
–
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
–
–
–
Leave open
9524B–AT42–04/09