DM74LS90M datasheet(3/10 Pages) NSC

部品番号	DM74LS90M

部品情報	Decade and Binary Counters

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’LS90 Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted) (Continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 1)

IIH

High Level Input

VCC e Max VI e 27V

Reset

20

Current

A40

m

A

B80

IIL

Low Level Input

VCC e Max VI e 04V

Reset

b

04

Current

A

b

24

mA

B

b

32

IOS

Short Circuit

VCC e Max (Note 2)

b

20

b

100

mA

Output Current

ICC

Supply Current

VCC e Max (Note 3)

9

15

mA

Note 1

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

Note 2

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

Note 3

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

Note 4

QA outputs are tested at IOL e Max plus the limit value of IIL for the B input This permits driving the B input while maintaining full fan-out capability

’LS90 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

fMAX

Maximum Clock

A to QA

32

20

MHz

Frequency

BtoQB

16

10

tPLH

Propagation Delay Time

AtoQA

16

20

ns

Low to High Level Output

tPHL

Propagation Delay Time

AtoQA

18

24

ns

High to Low Level Output

tPLH

Propagation Delay Time

AtoQD

48

52

ns

Low to High Level Output

tPHL

Propagation Delay Time

AtoQD

50

60

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

30

ns

High to Low Level Output

tPLH

Propagation Delay Time

BtoQC

32

37

ns

Low to High Level Output

tPHL

Propagation Delay Time

BtoQC

35

44

ns

High to Low Level Output

tPLH

Propagation Delay Time

BtoQD

32

36

ns

Low to High Level Output

tPHL

Propagation Delay Time

BtoQD

35

44

ns

High to Low Level Output

tPLH

Propagation Delay Time

SET-9 to

30

35

ns

Low to High Level Output

QA QD

tPHL

Propagation Delay Time

SET-9 to

40

48

ns

High to Low Level Output

QB QC

tPHL

Propagation Delay Time

SET-0 to

40

52

ns

High to Low Level Output

Any Q

3

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