dm74ls169a Fairchild Semiconductor, dm74ls169a Datasheet - Page 3

• Manufacturer Part Number: dm74ls169a
• Description: Synchronous 4-bit Up/down Binary Counter
• Manufacturer: Fairchild Semiconductor

f
t
t
t
t
t
t
t
t
Symbol
MAX
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
Switching Characteristic
at V
Note 8: 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.
CC
= 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
A
Parameter
= 25˚C (for Test Waveforms and Output Load)
Ripple Carry (Note 8)
Ripple Carry (Note 8)
From (Input)
Ripple Carry
Ripple Carry
Ripple Carry
Ripple Carry
To (Output)
Up/Down to
Up/Down to
Enable T to
Enable T to
Clock to
Clock to
Clock to
Clock to
Any Q
Any Q
3
Min
25
C
L
= 15 pF
Max
35
35
20
23
18
18
25
29
R
L
= 2 k
Min
20
C
L
= 50 pF
Max
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39
44
24
32
24
28
30
38
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns