If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

Supply Voltage

70V

Input Voltage

55V

Storage Temperature Range

b

Maximum Power Dissipation at 25 C

Cavity Package

1308 mW

Molded Package

1207 mW

Lead Temperature (Soldering 4 seconds)

260 C

Derate cavity package 87 mW C above 25 C derate molded package

97 mW C above 25 C

Operating Conditions

Min

Max

Units

DS7640

45

55

V

DS8640

475

525

V

DS7640

b

55

a

125

C

DS8640

0

a

70

C

Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units

High Level Input Threshold

DS7640

180

150

V

DS8640

170

150

V

Low Level Input Threshold

DS7640

150

120

V

DS8640

150

130

V

Maximum Input Current

30

80

m

A

10

50

m

A

Maximum Input Current

10

50

m

A

Output Voltage

24

V

Output Voltage

025

04

V

Output Short Circuit Current

b

18

b

55

mA

Power Supply Current

25

40

mA

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Propagation Delays

(Notes 5 and 6)

Input to Logic ‘‘1’’ Output

10

23

35

ns

Input to Logic ‘‘0’’ Output

10

15

30

ns

Note 1

‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’

they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device

operation

Note 2

Note 3

All currents into device pins shown as positive out of device pins as negative all voltages referenced to ground unless otherwise noted All values shown

as max or min on absolute value basis

Note 4

Only one output at a time should be shorted

Note 5

Note 6

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