DM74LS293M datasheet(3/6 Pages) NSC

Part #	DM74LS293M

Description	4-Bit Binary Counter

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Manufacturer	NSC [National Semiconductor (TI)]

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Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)

From (Input)

RL e 2kX

Symbol

Parameter

To (Output)

CL e 15 pF

CL e 50 pF

Units

Min

Max

Min

Max

tMAX

Maximum Clock

A to QA

32

20

MHz

Frequency

BtoQB

16

10

tPLH

Propagation Delay Time

AtoQA

16

23

ns

Low to High Level Output

tPHL

Propagation Delay Time

AtoQA

18

30

ns

High to Low Level Output

tPLH

Propagation Delay Time

AtoQD

70

87

ns

Low to High Level Output

tPHL

Propagation Delay Time

AtoQD

70

93

ns

High to Low Level Output

tPLH

Propagation Delay Time

BtoQB

16

23

ns

Low to High Level Output

tPHL

Propagation Delay Time

BtoQB

21

35

ns

High to Low Level Output

tPLH

Propagation Delay Time

BtoQC

32

48

ns

Low to High Level Output

tPHL

Propagation Delay Time

BtoQC

35

53

ns

High to Low Level Output

tPLH

Propagation Delay Time

BtoQD

51

71

ns

Low to High Level Output

tPHL

Propagation Delay Time

BtoQD

51

71

ns

High to Low Level Output

tPHL

Propagation Delay Time

SET-0 to

40

53

ns

High to Low Level Output

Any Q

Note 1

CL e 15 pF RL e 2kX TA e 25 C and VCC e 5V

Note 2

CL e 50 pF RL e 2kX TA e 25 C and VCC e 5V

Note 3

All typicals are at VCC e 5V TA e 25 C

Note 4

Not more than one output should be shorted at a time and the duration should not exceed one second

Note 5

ICC is measured with all outputs open both RO inputs grounded following momentary connection to 45V and all other inputs grounded

Note 6

TA e 25 C and VCC e 5V

3

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DM74LS293M Datasheet(PDF) 3 Page - National Semiconductor (TI)

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