Peak Reducing EMI Solution

4 of 8

February 2008

ASM3P2180A

rev 1.2

Notice: The information in this document is subject to change without notice.

AC Electrical Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

FS=0

6

10

CLKIN

Input frequency

FS=1

18

30

MHz

FS=0

6

10

CLKOUT

Output frequency

FS=1

18

30

MHz

Output rise time (measured at 0.8V to 2.0V)

1.2

1.3

1.4

nS

Output fall time (measured at 2.0V to 0.8V)

0.8

0.9

1.0

nS

Jitter (cycle to cycle)

325

pS

Output duty cycle

45

50

55

%

Typical Test Circuit

+3.3V

Spread spectrum output

(EMI suppressed)

XIN

GND

0.1uF

XOUT

CLKOUT

VDD

Crystal

C1

C2