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MM74HC175SJX (XY307A00)
MAIN: IC024, 046-049
Quad D-Type Flip-Flop
CL
1
16
VDD
2
15
1Q
4Q
Q CL
CL
Q
CK
CK
Q
D
D
Q
3
14
1Q
4Q
4
1D
13
4D
5
12
2D
3D
6
11
2Q
Q
D
D
Q
3Q
CK
CK
Q CL
CL
Q
7
2Q
10
3Q
8
Vss
9
CK
TC74HC4052AF (XS790A00)
MAIN: IC044, 045
Differential 4-Channel
Multiplexer/Demultiplexer
1
0Y
16
VDD
2Y
2
2Y
2X
15
2X
Y-COM
3
Y-COM
1X
14
1X
3Y
4
3Y
X-COM
13
X-COM
1Y
5
1Y
0X
12
0X
INH
6
INH
3X
11
3X
VEE
7
A
10
A
VSS
8
B
9
SN75124NSR (XV930A00)
MAIN: IC039
Triple Line Receiver
1A
Vcc
1
16
1B
1S
2
15
2R
1R
3
14
2S
1Y
4
13
2A
3A
5
12
2B
3S
6
11
2Y
3R
7
10
GND
8
9
3Y
TC74VHC245F (XT487A00)
MAIN:
IC029, 066, 067, 074, 075
MM74HC245ASJX (XW107A00)
MAIN:
IC030, 031, 052-061, 068-073
SN74ABT245BNSR (XU009A00)
MAIN:
IC050, 051
Octal 3-State Bus Transceiver
D1R
1
20
Vcc
2
19
A1
G
18
3
A2
B1
17
4
A3
B2
16
5
A4
B3
15
A5
6
B4
14
A6
7
B5
13
A7
8
B6
A8
12
9
B7
11
GND
B8
10
TC74LVX4245FS (XU229A00)
MAIN: IC111-117
Dual Supply Octal Bus Transceiver
VCCA
1
VCCB
24
0
VCCB
DIR
2
1
23
A
/G
A1
3
2
B
22
B1
A2
4
3
D
21
A3
5
4
D
20
B2
A4
6
5
G2
19
B3
A5
7
18
6
G1
B4
A6
8
7
15
B5
17
A7
9
16
8
14
B6
A8
10
9
13
15
B7
GND
11
14
10
12
B8
11
GND
12
13
GND
SN75C1168NSR (XU073A00)
MAIN: IC021, 037, 122
Line Driver / Receiver
1
1B
16
Vcc
2
15
1A
1D
3
14
1R
1Y
4
13
1DE
1Z
5
12
2R
2DE
6
11
2A
2Z
7
2B
10
2Y
8
9
GND
2D
MM74HC273SJX (XY198A00)
MAIN: IC023
Octal D-Type Flir Flop
1
CLEAR
2
1Q
Q
Q
CL
CL
3
D CK
CK
D
1D
4
2D
D
CK
CK
D
CL
CL
5
Q
Q
2Q
6
3Q
Q
Q
CL
CL
7
D CK
CK
D
3D
8
4D
D
CK
CK
D
CL
CL
9
4Q
Q
Q
10
GND
SN75121NSR (XU816A00)
MAIN: IC036, 043
Dual Line Driver
1A
1
16
1B
2
15
1C
3
14
1D
4
13
1E
5
12
1F
6
11
10
1Y
7
GND
8
9
AM26LS31CNSR (XU996A00)
MAIN: IC034, 035, 118, 119
Quad Line Driver
1A
1
16
1Y
2
15
1Z
3
14
ENABLE G
4
13
2Z
5
12
2Y
6
11
2A
7
10
GND
8
9
INPUT
ENABLES
OUTPUTS
A
G
G
Y
Z
H
H
X
H
L
H= high level
L
H
X
L
H
L= low level
H
X
L
H
L
X= irrelevant
L
X
L
L
H
Z= high impedance (off)
X
L
H
Z
Z
AFC1
20
VCC
19
8Q
18
8D
17
7D
16
7Q
15
6Q
14
6D
13
5D
12
5Q
11
CLOCK
Vcc
2F
2E
2D
2C
2B
2A
2Y
Vcc
4A
4Y
4Z
ENABLE G
3Z
3Y
3A
19
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