P-70/P-70S
20
■
IC BLOCK DIAGRAM
（
IC
ブロック図）
M4580L (XF195A00)
Dual Operational Amplifier
NJM4580E (TE2) (X2331A00)
Dual Operatinal Amplifier
SN74AHCT1G08DCKR (X0158A00)
Single 2-Input Positive-AND Gate
LA4536M (X6813A00)
Headphone-stereo Power Amplifier
ADCS7478AIMF (X5892A00)
Analog to Digital Converter
1
A
2
3
4
5
6
7
8
IN
V
+
IN
OUT
A
A
A
+
V
IN
+
IN
OUT
B
B
B
+
B
+
1
2
3
A
B
GND
5
4
Vcc
Y
INPUTS
FUNCTION TABLE
OUTPUT
A
B
Y
H
L
L
H
X
L
H
L
X
1
2
3
4
-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+
-
+
-
POWER
SWITCH
P/SW
IN 1
PRE GND
IN 2
REF
MT/SW
OUT 1
POWER GND
OUT 2
V
CC
BIAS
MUTE
CIRCUIT
Amp1
Amp2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
6
5
V
DD
V
IN
T/H
SCLK
CS
SDATA
SUCCESSIVE
APPROXIMATION
ADC
CONTROL
LOGIC
GND
Oscillating circuit
Counter timer
Vref
-
+
1
3
4
5
GND
ER
V
DD
Vout
Oscillating circuit
Counter timer
Delaying circuit
+
-
1
3
2
4
5
N.C
DS
V
DD
V
SS
OUT
S-80136ANMC-JCV-T2 (X4374A00)
Reset
V
REF