XRK4993 Datasheet, PDF (11/13 Pages) Exar Corporation – 3.3V PROGRAMMABLE SKEW CLOCK BUFFER

REV. 1.0.0
FIGURE 7. TIMING DIAGRAM PE=LOW
XRK4993
3.3V PROGRAMMABLE SKEW CLOCK BUFFER
Clkin
FB_In
Qxn
QC div2
QC div4
PE = LOW TIMING:
All output changes occur on the falling edge of the Clkin reference signal. Programmable skews are made
relative to this edge.
FIGURE 8. TIMING DIAGRAM PE=HIGH
Clkin
FB_In
Qxn
QC div2
QC div4
PE=HIGH TIMING:
When the PE pin is High, all changes begin relative to the rising edge of the Clkin reference signal. This
includes not only the "zero tu" signals but also the divided output signals. The divided-by-two outputs will
change on each rising edge. As QD can only be 0tu, QC is the only "divide by" output providing either divide-
by- two or divide-by-four, not both.
11