LC717A00AJ
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7
Block Diagram
Figure 8. Simplified Block Diagram
Cin0
SCL/SCK
SDA/SI
V
DD
V
SS
INTOUT
Cin1
Cin2
Cin3
Cin4
Cin5
Cin6
Cin7
Pout0
Pout1
Pout6
Pout7
Pout5
Pout4
Pout3
Pout2
nCS
SA/SO
Cdrv
GAIN
nRST
ERROR
Cref
MUX
1st
AMP
A/D
CONVERTER
2nd
AMP
POR
CONTROL
LOGIC
OSCILLATOR
I
2
C/SPI
+
+
LC717A00AJ is capacitance-digital-converter LSI
capable of detecting changes in capacitance in the femto
Farad order. It consists of an oscillation circuit that generates
the system clock, a power-on reset circuit that resets the
system when the power is turned on, a multiplexer that
selects the input channels, a two-stage amplifier that detects
the changes in the capacitance and outputs analog-amplitude
values, a A/D converter that converts the analog-amplitude
values into digital data, and a control logic that controls the
entire chip. Also, it has an I
2
C compatible bus or SPI that
enables serial communication with external devices as
necessary.
LC717A00AJ
www.onsemi.com
8
Pin Assignment
Figure 9. Pin Assignment (Top View)
Cref
Pout7
30
1
16
15
ERROR
Pout6
Cdrv
Pout5
INTOUT
Pout4
GAIN
Pout3
SCL/SCK
Pout2
SDA/SI
Pout1
SA/SO
Pout0
nCS
Cin7
nRST
Cin6
Non Connect
Cin5
Cin0
Cin4
Cin1
Non Connect
Cin2
V
SS
Cin3
V
DD
Table 7. PIN ASSIGNMENT
Pin No.
Pin Name Pin No. Pin Name
1 V
DD
16 Cref
2 V
SS
17 ERROR
3 Non Connect (Note 13) 18 Cdrv
4 Cin4 19 INTOUT
5 Cin5 20 GAIN
6 Cin6 21 SCL/SCK
7 Cin7 22 SDA/SI
8 Pout0 23 SA/SO
9 Pout1 24 nCS
10 Pout2 25 nRST
11 Pout3 26 Non Connect (Note 13)
12 Pout4 27 Cin0
13 Pout5 28 Cin1
14 Pout6 29 Cin2
15 Pout7 30 Cin3
13.Connect to GND when mounted.
LC717A00AJ
www.onsemi.com
9
Table 8. PIN FUNCTION
Pin Name
I/O Pin Functions Pin Type
Cin0 I/O Capacitance sensor input
R
AMP
V
DD
V
SS
Buffer
Cin1 I/O Capacitance sensor input
Cin2 I/O Capacitance sensor input
Cin3 I/O Capacitance sensor input
Cin4 I/O Capacitance sensor input
Cin5 I/O Capacitance sensor input
Cin6 I/O Capacitance sensor input
Cin7 I/O Capacitance sensor input
Cref I/O Reference capacitance input
Pout0 O Cin0 judgment result output
V
DD
V
SS
Buffer
Pout1 O Cin1 judgment result output
Pout2 O Cin2 judgment result output
Pout3 O Cin3 judgment result output
Pout4 O Cin4 judgment result output
Pout5 O Cin5 judgment result output
Pout6 O Cin6 judgment result output
Pout7 O Cin7 judgment result output
ERROR O Error occurrence status output
Cdrv O Output for capacitance sensors drive
INTOUT O Interrupt output
SCL/SCK I Clock input (I
2
C) / Clock input (SPI)
V
DD
V
SS
R
GAIN I Selection pin of the initial value of
gain of the 2nd-amplifier
nCS I Interface selection / Chip select
inverting input (SPI)
nRST I External reset signal inverting input
SDA/SI I/O Data input and output (I
2
C) /
Data input (SPI)
V
DD
V
SS
R

LC717A00AJ-AH

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Capacitive Touch Sensors TOUCH SENSOR 8CH 8OUT
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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