dm74ls190 National Semiconductor Corporation, dm74ls190 Datasheet - Page 3

• Manufacturer Part Number: dm74ls190
• Description: Synchronous 4-bit Up/down Counters With Mode Control
• Manufacturer: National Semiconductor Corporation

’LS190 and ’LS191 Switching Characteristics
at V
Symbol
f
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
MAX
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
CC
e
5V and T
Maximum Clock
Frequency
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
A
e
Parameter
25 C (See Section 1 for Test Waveforms and Output Load)
From (Input)
Ripple Clock
Ripple Clock
Ripple Clock
Ripple Clock
Ripple Clock
Ripple Clock
To (Output)
Up Down to
Up Down to
Down Up to
Down Up to
Enable to
Enable to
Max Min
Max Min
Max Min
Max Min
Clock to
Clock to
Clock to
Clock to
Clock to
Clock to
Load to
Load to
Data to
Data to
Any Q
Any Q
Any Q
Any Q
Any Q
Any Q
3
Min
20
C
L
e
15 pF
Max
33
50
22
50
20
24
24
36
42
52
45
45
33
33
33
33
R
L
e
2 kX
Min
20
C
L
e
50 pF
Max
43
59
26
62
24
33
29
45
47
65
50
54
36
42
36
42
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns