Casio TE-7000S Service Manual page 76

14. SN74LV14APWR (IC8)
(TOP VIEW)
1A V
1 14
CC
1Y 6A
2 13
2A 6Y
3 12
2Y 5A
4 11
3A 5Y
5 10
3Y 4A
6 9
GND 7 8 4Y
FUNCTION TABLE
(each inverter)
INPUT OUTPUT
A Y
H L
L H
15. SN74LV244APWR (IC9)/ SN74LVC244APWR (IC27, 28)
1
1G
1A1 2
2Y4 3
1A2
4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
16. SN74LVC245APWR (IC29, 30)
1 20
T/R
2 19
A0
3 18
A1
4 17
A2
5 16
A3
6 15
A4
7 14
A5
8 13
A6
9 12
A7
10 11
GND
1
1A
3
2A
5
3A
9
4A
11
5A
13
6A
20 V
CC
19
2G
18
1Y1
17 2A4
16 1Y2
15 2A3
14
1Y3
13 2A2
12
1Y4
11
2A1
Inputs
Vcc
OE T / R
OE L L Bus B Data to Bus A
L H Bus A Data to Bus B
B0
H X
B1
H : High
B2
L : Low
B3
X :
Don't care
Z :
High impedance
B4
B5
B6
B7
— 74 —
A
Output Y
Z
2
1Y
4
2Y
6
3Y
8
4Y
10
5Y
12
6Y
Y