DP84244 datasheet(3/6 Pages) NSC

3 / 6 page

Switching Characteristics VCC e 5V g10% 0 s TA s 70 C all outputs loaded with specified load capaci-

tance and all eight outputs switching simultaneously (Note 3)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tPLH

Propagation Delay from

Figures 1

CL e 250 pF

LOW-to-HIGH Output

CL e 500 pF

tPHL

Propagation Delay from

CL e 250 pF

HIGH-to-LOW Output

CL e 500 pF

tPLZ

Output Disable Time from LOW

Figures 2

4 S e 1 CL e 50 pF

tPHZ

Output Disable Time from HIGH

Figures 2

4 S e 2 CL e 50 pF

tPZL

Output Enable Time to LOW

Figures 2

4 S e 1 CL e 500 pF

tPZH

Output Enable Time to HIGH

Figures 2

4 S e 2 CL e 500 pF

tSKEW

Output-to-Output Skew (Note 4)

Figures 1

3 CL e 500 pF

Capacitance TA e 25 C f e 1 MHz VCC e 5V g10% (Note 3)

Parameter

Conditions

Typ

Units

CIN

All Other Inputs Tied Low

COUT

Output in TRI-STATE Mode

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

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

All values shown as max or min are on an absolute value basis

Note 3

Typical characteristics are taken at VCC e 50V and TA e 25 C

Note 4

The output-to-output skew is primarily a function of the number of outputs switching and the capacitive loading on those outputs See

Figures 5 and 6 for

the switching time variations

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