dm74as169a Fairchild Semiconductor, dm74as169a Datasheet - Page 4

• Manufacturer Part Number: dm74as169a
• Description: Synchronous 4-bit Binary Up/down Counter
• Manufacturer: Fairchild Semiconductor

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f
t
t
t
t
t
t
t
t
MAX
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
Switching Characteristics
over recommended operating free air temperature range
Note 3: Propagation delay time 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 (0), the ripple carry output transition will be in phase. If the count is
maximum, the ripple carry output will be out of phase.
Symbol
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
V
R
C
CC
L
L
500
50 pF
4.5V to 5.5V
Conditions
4
(Note 3)
(Note 3)
From
Clock
Clock
Clock
Clock
En T
En T
U/D
U/D
RIPPLE Carry
RIPPLE Carry
RIPPLE Carry
RIPPLE Carry
RIPPLE Carry
RIPPLE Carry
Any Q
Any Q
To
Min
1.5
1.5
75
3
2
1
2
2
2
Max
16.5
13
13
12
13
7
9
9
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns