Symbol

Parameter

Conditions

Min

Typ

Max

Units

Storage Delay Negative Edge

(

45

7

ns

75

12

ns

Storage Delay Positive Edge

(

5

8

ns

8

13

ns

Fall Time

(

5

8

ns

22

35

ns

Rise Time

(

6

9

ns

21

35

ns

Delay from Disable Input to Logical ‘‘0’’

10

15

ns

Level (from High Impedance State)

Delay from Disable Input to Logical ‘‘1’’

815

ns

Level (from High Impedance State)

Delay from Disable Input to High Impedance

15

25

ns

State (from Logical ‘‘0’’ Level)

Delay from Disable Input to High Impedance

10

25

ns

State (from Logical ‘‘1’’ Level)

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

a

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

When measuring output drive current and switching response for the DS1679 and DS3679 a 15X resistor should be placed in series with each output This

resistor is internal to the DS1649DS3649 and need not be added

AC Test Circuits and Switching Time Waveforms

TLF7515 – 4

TLF7515 – 5

FIGURE 1

3