W150

Rev 1.0, November 24, 2006

Page 10 of 14

AC Electrical Characteristics

= 14.31818 MHz. AC clock parameters are tested and

guaranteed over stated operating conditions using the stated

lump capacitive load at the clock output; Spread Spectrum

clocking is disabled.

Crystal Oscillator

1.65

V

Load Capacitance, Imposed on

14

pF

Pin X2 unconnected

28

pF

Pin Capacitance/Inductance

Input Pin Capacitance

Except X1 and X2

5

pF

Output Pin Capacitance

6pF

Input Pin Inductance

7nH

Parameter

Description

Test Condition

Min.

Typ.

Max.

Unit

CPU Clock Outputs, CPU_F, 1:2 (Lump Capacitance Test Load = 20 pF)

Parameter

Description

Test Condition/Comments

CPU = 66.8 MHz

CPU = 100 MHz

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Period

Measured on rising edge at 1.25

15

15.5

10

10.5

ns

High Time

Duration of clock cycle above 2.0V

5.2

3.0

ns

Low Time

Duration of clock cycle below 0.4V

5.0

2.8

ns

Output Rise Edge Rate Measured from 0.4V to 2.0V

1

4

1

4

V/ns

Output Fall Edge Rate

Measured from 2.0V to 0.4V

1

4

1

4

V/ns

Duty Cycle

Measured on rising and falling edge at

1.25V

45

55

45

55

%

Jitter, Cycle-to-Cycle

Measured on rising edge at 1.25V.

Maximum difference of cycle time

between two adjacent cycles.

250

250

ps

Output Skew

Measured on rising edge at 1.25V

175

175

ps

Frequency Stabilization

from Power-up (cold

start)

Assumes full supply voltage reached

within 1 ms from power-up. Short cycles

exist prior to frequency stabilization.

33

ms

AC Output Impedance

Average value during switching

transition. Used for determining series

termination value.

20

20

PCI Clock Outputs, PCI_F and PCI0:5 (Lump Capacitance Test Load = 30 pF)

Parameter

Description

Test Condition/Comments

CPU = 66.6/100 MHz

Unit

Min.

Typ.

Max.

Period

Measured on rising edge at 1.5V

30

ns

High Time

Duration of clock cycle above 2.4V

12.0

ns

Low Time

Duration of clock cycle below 0.4V

12.0

ns

Output Rise Edge Rate

Measured from 0.4V to 2.4V

1

4

V/ns

Notes:

7. The W150 contains an internal crystal load capacitor between pin X1 and ground and another between pin X2 and ground. Total load placed on crystal is 14 pF;

this includes typical stray capacitance of short PCB traces to crystal.

8. X1 input capacitance is applicable when driving X1 with an external clock source (X2 is left unconnected).

Output Fall Edge Rate

Measured from 2.4V to 0.4V

1

4

V/ns