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4.10 HD74HCT126T-X (IC503,IC941) : Buffer
• Pin layout
1C
1
1A
2
1Y
3
2C
4
2A
5
2Y
6
GND
7
• Block diagram
TE
L 13942296513
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14
Vcc
13
4C
12
4A
11
4Y
10
3C
9
3A
8
3Y
1A
1C
2A
2C
3A
3C
4A
4C
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http://www.xiaoyu163.com
2 9
8
• Pin function
Input
Output
C
A
L
X
H
L
H
H
H : High level
L : Low level
X : Irrelevant
Z : Off (Hhigh-impedance)state of a 3-stage output
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
Y
Z
L
H
1Y
0 5
8
2 9
9 4
2 8
2Y
3Y
4Y
m
(No.49831)1-43
9 9
9 9
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