HD74LS221RP 데이터 시트보기 (PDF) - Renesas Electronics
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HD74LS221RP Datasheet PDF : 9 Pages
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HD74LS221
Waveforms 1
Trigger from B, then clear (A input is low).
tTLH
tw (in)
tTHL
B Input
90%
10% 1.3V
90%
1.3V 10%
≥ 60ns
CLR
1.3V
tPLH
tPHL
Q
1.3V
tPHL
tPLH
Q
1.3V
Note: Input pulse: tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz
1.3V
1.3V
Waveforms 2
Trigger from A, then clear (B input is high).
tTHL
tw (in)
tTLH
A
90%
1.3V
10%
90%
1.3V
10%
≥ 60ns
CLR
1.3V
tPLH
tPHL
Q
1.3V
1.3V
tPLH
Q
1.3V
tPHL
Note: Input pulse: tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz
1.3V
3V
0V
3V
0V
3V
0V
VOH
VOL
3V
0V
3V
0V
VOH
VOL
VOH
VOL
Rev.3.00, Jul.15.2005, page 5 of 8
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