DM7556J datasheet(2/8 Pages) NSC

No de pièce	DM7556J

Description	TRI-STATE Programmable Binary Counters

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Fabricant	NSC [National Semiconductor (TI)]

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Absolute Maximum Ratings (Note)

If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

Supply Voltage

7V

Input Voltage

55V

Operating Free Air Temperature Range

DM75

b

55 Cto a125 C

DM85

0 Cto a70 C

Storage Temperature Range

b

65 Cto a150 C

Note

The ‘‘Absolute Maximum Ratings’’ are those values

beyond which the safety of the device cannot be guaran-

teed The device should not be operated at these limits The

parametric values defined in the ‘‘Electrical Characteristics’’

table are not guaranteed at the absolute maximum ratings

The ‘‘Recommended Operating Conditions’’ table will define

the conditions for actual device operation

Recommended Operating Conditions

Symbol

Parameter

DM7556

DM8556

Units

Min

Nom

Max

Min

Nom

Max

VCC

Supply Voltage

45

5

55

475

5

525

V

VIH

High Level Input Voltage

2

V

VIL

Low Level Input Voltage

08

V

IOH

High Level Output Current

b

2

b

52

mA

IOL

Low Level Output Current

16

mA

fCLK

Clock Frequency (Note 1)

0

25

0

25

MHz

tW

Pulse Width

Clock

25

(Note 1)

Clear

20

ns

Load

30

tCE

Count Enable

Setup

30

ns

Time (Note 1)

Hold

b

10

b

10

tSETUP(1)

Setup Time High

Data

25

ns

Logic Level (Note 1)

Load

30

tHOLD(1)

Hold Time High

Data

5

ns

Logic Level (Note 1)

Load

b

10

b

10

tSETUP(0)

Setup Time Low

Data

30

ns

Logic Level (Note 1)

Load

25

tHOLD(0)

Hold Time Low

Data

5

ns

Logic Level (Note 1)

Load

b

10

b

10

TA

Free Air Operating Temperature

b

55

125

0

70

C

Note 1

TA e 25 C and VCC e 5V

2

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