hd74ls191 Renesas Electronics Corporation., hd74ls191 Datasheet - Page 9

• Manufacturer Part Number: hd74ls191
• Description: Synchronous Up / Down 4-bit Binary Counter Single Clock Line
• Manufacturer: Renesas Electronics Corporation.

HD74LS191
Waveforms 4
Clock Q
Waveforms 5
Clock Max / Min
Rev.2.00, Feb.18.2005, page 9 of 10
Inputs
Enable = 0V
Down/Up
Enable = 0V
(A to D)
Clock
Load
Down/Up
Data
Max/Min
Q
Clock
Load
B, C, D
A
t
PLH
1.3V
1.3V
1.3V
1.3V
t
1.3V
PLH
1.3V
t
PHL
t
PLH
1.3V
1.3V
1.3V
1.3V
1.3V
t
PHL
t
1.3V
PHL
3V
0V
3V
0V
3V
0V
3V
0V
V
V
OH
OL
3V
0V
3V
0V
3V
0V
3V
0V
3V
0V
V
V
OH
OL