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DM7490A Datasheet(PDF) 4 Page - Fairchild Semiconductor

Part No. DM7490A
Description  Decade and Binary Counters
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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4
AC Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
Parameter
From (Input)
RL = 400Ω, CL = 15 pF
Units
To (Output)
Min
Max
fMAX
Maximum Clock
A to QA
32
MHz
Frequency
B to QB
16
tPLH
Propagation Delay Time
A to QA
16
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
A to QA
18
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
A to QD
48
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
A to QD
50
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
B to QB
16
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
B to QB
21
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
B to QC
32
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
B to QC
35
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
B to QD
32
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
B to QD
35
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
SET-9 to QA, QD
30
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
SET-9 to QB, QC
40
ns
HIGH-to-LOW Level Output
tPHL
Propagation Delay Time
SET-0
40
ns
HIGH-to-LOW Level Output
Any Q




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