DM7490A datasheet(4/5 Pages) FAIRCHILD

Part #	DM7490A

Description	Decade and Binary Counters

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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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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