W164G Cypress Semiconductor Corp., W164G Datasheet - Page 9

• Manufacturer Part Number: W164G
• Description: Spread Spectrum Desktop / Notebook System Frequency Generator
• Manufacturer: Cypress Semiconductor Corp.

PCI Clock Outputs, PCI1:6 and PCI_F (Lump Capacitance Test Load = 30 pF
IOAPIC Clock Output (Lump Capacitance Test Load = 20 pF)
REF2X Clock Output (Lump Capacitance Test Load = 20 pF)
Document #: 38-07169 Rev. *A
Parameter
t
t
t
t
t
t
t
t
t
f
Z
Parameter
f
t
t
t
f
Z
f
t
t
t
f
Z
Parameter
P
H
L
R
F
D
JC
SK
O
ST
R
F
D
ST
R
F
D
ST
o
o
o
Period
High Time
Low Time
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Jitter, Cycle-to-Cycle
Output Skew
CPU to PCI Clock Skew
Frequency Stabilization
from Power-up (cold
start)
AC Output Impedance
Frequency, Actual
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization
from Power-up (cold start)
AC Output Impedance
Frequency, Actual
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization from
Power-up (cold start)
AC Output Impedance
Description
Description
Description
Measured on rising edge at 1.5V
Duration of clock cycle above 2.4V
Duration of clock cycle below 0.4V
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Measured on rising edge at 1.5V. Maximum
difference of cycle time between two adjacent cycles.
Measured on rising edge at 1.5V
Covers all CPU/PCI outputs. Measured on rising
edge at 1.5V. CPU leads PCI output.
Assumes full supply voltage reached within 1 ms
from power-up. Short cycles exist prior to frequency
stabilization.
Average value during switching transition. Used for
determining series termination value.
Frequency generated by crystal oscillator
Measured from 0.4V to 2.0V
Measured from 2.0V to 0.4V
Measured on rising and falling edge at 1.25V
Assumes full supply voltage reached within
1 ms from power-up. Short cycles exist prior to
frequency stabilization.
Average value during switching transition. Used
for determining series termination value.
Frequency generated by crystal oscillator
Measured from 0.4V to 2.4V
Measured from 2.4V to 0.4V
Measured on rising and falling edge at 1.5V
Assumes full supply voltage reached within
1 ms from power-up. Short cycles exist prior to
frequency stabilization.
Average value during switching transition. Used
for determining series termination value.
Test Condition/Comments
Test Condition/Comments
Test Condition/Comments
Min.
CPU = 66.8/100 MHz
45
1
1
Min.
CPU = 66.8/100 MHz
0.5
0.5
45
CPU = 66.8/100 MHz
Min.
30
12
12
45
1
1
1
14.31818
Typ.
14.318
15
Typ.
Typ.
15
20
Max.
1.5
55
Max.
4
4
Max.
250
500
55
55
Page 9 of 12
4
4
4
3
2
2
3
W164
MHz
V/ns
V/ns
Unit
Unit
MHz
V/ns
V/ns
V/ns
V/ns
ms
Unit
%
ms
ms
ns
ns
ns
ps
ps
ns
%
%