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74LCX32MTC-X (IC522) : OR gate
1.Block diagram
1
14
A0
2
13
B0
3
12
C0
4
11
A1
5
10
B1
6
9
C1
7
8
GND
74LCX373MTC-X (IC512, IC513) : Latch
1.Pin layout
OE
1
20
Vcc
O0
2
19
O7
D0
3
18
D7
D1
4
17
D6
O1
5
16
O6
O2
6
15
O5
D2
7
14
D5
D3
8
13
D4
O3
9
12
O4
GND
10
11
LE
BA7625 (IC405) : Video selector
1.Block diagram
MONITOR OUT
1
GND
2
IN5
3
GND
4
IN4
5
CTL E
6
IN3
7
CTL D
8
2.Pin function
Symbol
Description
Vcc
An,Bn
Inputs
A2
On
Outputs
B2
C2
A3
B3
C3
2. Pin function
Symbol
Description
D0-D7
Data Inputs
LE
Latch Enable Input
OE
Output Enable Input
O0-O7
3-STATE Latch Outputs
16
IN1
15
CTL A
14
VOUT 1
logic
13
V
12
IN2
11
CTL B
logic
10
VOUT 2
11
CTL C
3.Truth table
LE
X
H
H
L
H=HIGH Voltage Level
L=LOW Vlotage Level
Z=High Impedance
X=Immaterial
O0=Previous O0 before HIGH-to-LOW transition of Latch Enable
2.Truth table
A
B
L
L
H
L
L
H
H
H
H
H
C
D
CC
L
L
H
L
L
H
H
H
H
H
C
D
L
L
H
L
L
H
H
H
H
H
RX-DV5RSL
Inputs
Outputs
OE
Dn
On
H
X
Z
L
L
L
L
H
H
L
X
O0
E
MONITOR OUT
IN1
*
IN2
*
IN3
*
L
IN4
H
IN5
E
VOUT1
--
*
IN2
*
IN3
*
L
IN4
H
IN5
E
VOUT2
IN1
*
--
*
IN3
*
L
IN4
H
IN5
1-47
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