HD74AC 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics
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HD74AC Datasheet PDF : 52 Pages
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FACT Descriptions and Family Characteristics
While this exercise can be done for FACT, it is no longer necessary. FACT is guaranteed to drive an
incident wave of enough voltage to switch another FACT input.
7
7
6
6
RECEIVER
DRIVER
5
5
4
4
3
3
2
2
1
1
0
RECEIVER
0
–1
DRIVER
–1
–1 0 1 2 3 4 5 6 7 8 9 10 11
Time (1 Propagation Delay/Div)
–1 0 1 2 3 4 5 6 7 8 9 10 11
Time (1 Propagation Delay/Div)
Figure 3 Resultant Waveforms Driving 50 Ω Line–Theoretical
7
VZR 0
6
5
4
3
2
1
0
–1
RECEIVER
DRIVER
7
6
VZR 0
5
4
3
2
1
0
–1
RECEIVER
DRIVER
50 100 150 200 250 300 350 400 450
Time (ns)
50 100 150 200 250 300 350 400 450
Time (ns)
Figure 4 Resultant Waveforms Driving 50 Ω Line–Actual
5
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