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| HD74LS191 Datasheet, PDF (8/11 Pages) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters(single clock line) | |||
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HD74LS191
Waveforms 2
LoadâQ, DataâQ
3V
Load
1.3V
1.3V
0V
Data
(A to D)
1.3V
3V
1.3V
0V
Output Q
1.3V
1.3V
1.3V
1.3V
VOH
VOL
tPLH
tPHL
tPLH
tPHL
Note: Conditions on other inputs are irrelevant.
Waveforms 3
GâRipple CK, CKâRipple CK, Down / UpâRipple CK, Down / UpâMax / Min
3V
Load
0V
Down/Up
3V
1.3V
1.3V
0V
Clock
3V
1.3V
1.3V
0V
3V
G
tPHL
tPLH
0V
tPHL
tPLH
Ripple/Clock
1.3V 1.3V
1.3V 1.3V
tPLH
tPHL
VOH
VOL
Max/Min
1.3V
1.3V
VOH
VOL
Rev.2.00, Feb.18.2005, page 8 of 10
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