dm54ls169a National Semiconductor Corporation, dm54ls169a Datasheet - Page 3

• Manufacturer Part Number: dm54ls169a
• Description: Synchronous 4-bit Up/down Binary Counter
• Manufacturer: National Semiconductor Corporation

Switching Characteristics
Symbol
f
t
t
t
t
t
t
t
t
Note 1 The propagation delay from UP DOWN to RIPPLE CARRY must be measured with the counter at either a minimum or a maximum count As the logic level
of the up down input is changed the ripple carry output will follow If the count is minimum the ripple carry output transition will be in phase If the count is
maximum the ripple carry output will be out of phase
MAX
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
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
Parameter
at V
Ripple Carry (Note 1)
Ripple Carry (Note 1)
CC
From (Input)
To (Output)
Ripple Carry
Ripple Carry
Ripple Carry
Ripple Carry
Up Down to
Up Down to
Enable T to
Enable T to
e
Clock to
Clock to
Clock to
Clock to
Any Q
Any Q
5V and T
A
3
e
25 C (See Section 1 for Test Waveforms and Output Load)
Min
25
C
L
e
15 pF
Max
35
35
20
23
18
18
25
29
R
L
e
2 kX
Min
20
C
L
e
50 pF
Max
39
44
24
32
24
28
30
38
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns