Input Timing Requirements

Over recommended operating supply and temperature ranges unless otherwise specified. (Note 2)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

REFERENCE CLOCK (WCLK

f

WC

Clock Frequency

4

28

MHz

WC

DC

Clock Duty Cycle

45

50

55

%

t

T

Clock Transition Times

(Rise or Fall, 10%–90%)

16

ns

PIXEL CLOCK (PCLK)

f

PCLK

Clock Frequency

4

16

MHz

t

CP

Clock Period

62.5

250

ns

CLK

DC

Clock Duty Cycle

45

50

55

%

t

T

Clock transition Time

1

6

ns

Note 1: “Absolute Maximum Ratings“ are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device

should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation.

Note 3: Current into a device pin is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to Ground unless otherwise

specified.

Timing Diagrams

20091610

FIGURE 1. Serial Data Valid

20091611

FIGURE 2. Parallel Set, Hold and Data Valid

www.national.com

6