June 2006

ASM3P2187A/B

rev 0.1

Spread Spectrum Clock Generator for Mobile Applications

4 of 9

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

DC Electrical Characteristics

( Test condition: All parameters are measured at -40°C to +85°C, 3.3V ± 0.3V , VSS =0V , unless otherwise stated)

Symbol

Parameter

Min

Typ

Max

Unit

Input low voltage

VSS – 0.3

-

0.8

V

Input high voltage

2.0

-

VDD+ 0.3

V

Input low current

-

-

-35

µA

Input high current

-

-

+35

µA

-

3

-

mA

-

3

-

mA

Output low voltage

VSS

-

0.4

V

Output high voltage

VDD-0.5

-

VDD

V

Dynamic supply current , TBD MHz Output, no load

TBD

TBD

mA

Static supply current standby mode

TBD

uA

VDD

Operating voltage

3.3

3.3

3.6

V

Power up time (first locked clock cycle after power up)

-

2

5

mS

For ModOUT

-

TBD

-

Ω

Clock output

impedance

For REFOUT

-

TBD

-

Ω

Input Capacitance, Ta=25°C, VDD=VIN=0V, f =1MHz

-

-

16

pF

REFOUT

12.5MHz to 50MHz

-

-

15

12.5MHz to 50MHz

-

-

15

Load Capacitance

ModOUT

50MHz to 80MHz

-

-

7

pF

AC Electrical Characteristics

( Test condition: All parameters are measured at -40°C to +85°C, 3.3V ± 0.3V , VSS =0V , unless otherwise stated)

Symbol

Parameter

Min

Typ

Max

Unit

Input frequency

12.5

-

20

MHz

ModOUT

50

-

80

Output frequency

REFOUT

12.5

-

20

MHz

Output rise time ( Measured from 0.8V to 2.0V )

-

TBD

-

nS

Output fall time ( Measured from 2.0V to 0.8V )

-

TBD

-

nS

Jitter (Cycle to cycle), Ta=25°C and VDD=3.3V

No Load Capacitance

-

-

TBD

pS

Output duty cycle

40

50

60

%

Modulation Frequency ,

Input Frequency =12.5MHz

32.4

KHz