TX-NR801/E
IC BLOCK DIAGRAMS AND DESCRIPTIONS
1A
1Y
2A
2Y
3A
3Y
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Vcc
6A
6Y
5A
5Y
4A
4Y
(TOP VIEW)
A
L
H
Y
L
H
Truth table
Q7102 TC74HCT7007AF(Hex buffer)
Q190 TC74VHC157FT(Quad 2-channel Multiplexer)
Q120 TC74VHC4040FT(12-stage ripple-carry binary counter)
SELECT
1A
1B
1Y
2A
2B
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vcc
ST
4A
4B
4Y
3A
3B
3Y
(TOP VIEW)
INPUTS
OUTPUT
ST
H
L
L
L
L
SELECT
X
L
L
H
H
A
X
L
H
X
X
B
X
X
X
L
H
L
L
H
L
H
X:Don't care
A
B
Y
A
B
Y
S
Y
G
A
B
Y
A
B
1A
1B
2A
2B
3A
3B
4A
4B
(2)
(3)
(5)
(6)
(11)
(10)
(14)
(13)
1Y
2Y
3Y
4Y
(4)
(7)
(9)
(12)
ST
SELECT
(15)
(1)
1
1
MUX
1
2
3
4
5
6
7
8
Q12
Q6
Q5
Q7
Q4
Q3
Q2
GND
16
15
14
13
12
11
10
9
Vcc
Q11
Q10
Q8
Q9
CLR
CK
Q1
CK
X
CLR
H
L
L
OUTPUT
All "L"
No change
Next condition
X: Don't care
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
(9)
(7)
(6)
(5)
(3)
(2)
(4)
(13)
(12)
(14)
(15)
(1)
RCTR 12
0
11
CT=0
+CT
CLR
CK
(11)
(10)
55