ASM3P2508A datasheet(5/11 Pages) ALSC

5 / 11 page

Peak EMI Reducing Solution

5 of 11

rev 1.3

February 2005

ASM3P2508A

AC Electrical Characteristics

Parameter

Symbol

Conditions/ Description

Min

Typ

Max

Unit

FOUT1CLK

640

680

750

Rise Time

VO = 0.8V to 2.0V; CL = 15pF

FOUT2CLK

440

480

600

FOUT1CLK

660

720

800

Fall Time

VO = 2.0V to 0.8V; CL = 15pF

FOUT2CLK

460

520

570

Clock Duty

Cycle

Ratio of pulse width (as measured from rising edge

to next falling edge at 2.5V) to one clock period

Output Frequency =120MHz

±2.73

Frequency

Deviation

Output Frequency =72MHz /48 MHz

±1.78

On rising edges 500 uS apart at 2.5 V relative to an

ideal clock, PLL B inactive *

Jitter, Long

Term

Tj (LT)

On rising edges 500 uS apart at 2.5 V relative to an

ideal clock, PLL B active *

165

From rising edge to next rising edge at 2.5 V,

PLL B inactive *

110

Jitter, peak to

peak

Tj (OT)

From rising edge to next rising edge at 2.5 V,

PLL B active *

390

Clock

Stabilization

Time

tSTB

Output active from power up, RUN Mode via

Software Power Down

125

* CL = 15 pF, Fxin = 14.31818 MHz

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