20
AD8HR
HD74LV157AFPEL
(IS015700)
Quad 2 to 1 Multiplexer
MAIN: IC923,930
TC74VHC244FT
(XW234A00)
Octal 3-State Bus Buffer
MAIN: IC3
TC74VHC245FT
(XU797A00)
TC74VHCT245AFT
(XT744A00)
Octal 3-State Bus Transceiver
MAIN: IC1,8,9,14,15,51,56,57,927,928
SUB: IC901,902
74LVX4245MTCX
(X3097A00)
Dual Supply Octal Bus Transceiver
MAIN: IC17,18
DS26C32ATMX
(XU815A00)
Quad Differential Line Receiver
SUB: IC905
TC74HC4053AF (EL)
(XY879A00)
Triple 2-Channel
Multiplexer/Demultiplexer
MAIN: IC102,202,302,402,502,602,702,802
NJM2904V (TE)
(XR532A00)
NJM2068MD-TE2
(X3505A00)
Dual Operational Amplifier
HIC-HA: IC101,102
MAIN: IC5,103,104,203,204,303,304,403,404,
503,504,603,604,703,704,803,804
HD74LV273AFPEL
(IS027300)
Octal D-Type Flir Flop
MAIN: IC963-968,970,971
SN75C1168NSR
(XU073A00)
Line Driver / Receiver
SUB: IC904
COMB: IC951
1
2
3
4
5
6
7
SELECT
1A
1A
1B
1B
1Y
1Y
2A
2A
2B
2B
2Y
2Y
16
15
14
13
12
11
10
Vcc
STROBE
G
4A
S3
Y
4A
4B
4B
4Y
4Y
3A
3A
3B
3B
8
GND
9
3Y
VCCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
VCCB
VCCB
/G
B1
B2
B3
B4
B5
B6
B7
B8
GND
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
8
9
10
12
13
14
15
G1
G2
D
D
B
A
11
24
23
22
21
20
19
18
8
9
10
11
12
16
15
14
13
17
CLEAR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
VCC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLOCK
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
Q
D CK
CL
D
Q
CK
CL
Q
D CK
CL
D
Q
CK
CL
D
Q
CK
CL
Q
D
CK
CL
D
Q
CK
CL
Q
D
CK
CL
1
2
3
4
5
6
7
1B
1A
1R
1DE
2R
2A
2B
16
15
14
13
12
11
10
Vcc
1D
1Y
1Z
2DE
2Z
2Y
8
GND
9
2D
1
2
3
4
5
6
7
INPUT A
INPUT A
OUTPUT A
OUTPUT C
INPUT C
INPUT C
GND
ENABLE
16
15
14
13
12
11
Vcc
INPUT B
INPUT B
OUTPUT B
ENABLE
OUTPUT D
INPUT D
8
9
10
INPUT D
+
-
-
+
+
-
-
+
Switches IN/OUT
Control Inhibit
V
EE
V
SS
Y1
Switches IN/OUT
Y0
Switches IN/OUT
Z1
Commons OUT/IN
Z
Swiches IN/OUT
Z0
Control Input
V
CC
B
Control Input
C
Commons OUT/IN
Y
Commons OUT/IN
X
Swiches IN/OUT
X1
Swiches IN/OUT
X0
Control Input
A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Y0
Y1
Z1
Z
Z0
INH
C
Y
X
X1
X0
A
B
1
2
3
4
-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
Ground
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+
-
+
-
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
(GND) Vss
VDD (Vcc)
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
1
D1R
2
3
4
5
6
7
8
9
10
A1
A2
A3
A4
A5
A6
A7
A8
GND
11
12
13
14
15
16
17
18
19
20
V
CC
G
B1
B2
B3
B4
B5
B6
B7
B8