February 2005

ASM3P2508SP

rev 0.4

Clock Synthesizer and Frequency Generator with Peak EMI reduction

3 of 7

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

DC Electrical Characteristics

(Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated)

Symbol

Parameter

Min

Typ

Max

Unit

Input low voltage

–

0.8

V

Input high voltage

2.0

–

V

Input low current

–

–

-35

µA

Input high current

–

–

35

µA

–

3

–

mA

–

3

–

mA

–

–

0.4

V

2.5

–

–

V

Static supply current *

–

–

10

µA

Dynamic supply current

(3.3V, 33.33MHz, 25MHz , 20MHz and 15pF loading)

–

20

_

mA

Operating voltage

3.0

3.3

3.6

V

Power-up time (first locked cycle after power up)**

–

–

5

mS

Clock output impedance

–

50

–

Ω

* PWRDNB pin is pulled low

AC Electrical Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

XIN

Input frequency

–

25

–

MHz

PCI_CLK

–

33.33

–

MHz

T1_CLK

24.999375

25

25.000625

Sys_REF_CLK

Output frequency

–

20

–

MHz

Modulation Rate

–

30

–

KHz

PCI_CLK (SSCG)

Deviation

–

-0.5

–

%

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

0.7

0.9

1.0

nS

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

0.6

0.8

1.0

nS

Jitter (cycle to cycle)

–

150

175

pS

Output duty cycle

45

50

55

%