W158
| Model | W158 |
| Description | Spread Spectrum System Frequency Synthesizer |
| PDF file | Total 12 pages (File size: 169K) |
| Chip Manufacturer | CYPRESS |
W158
IOAPIC Clock Outputs, IOAPIC0:2 (Lump Capacitance Test Load = 20 pF)
Parameter
f
t
R
t
F
t
D
f
ST
Description
Frequency
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization
from Power-up (cold start)
AC Output Impedance
Note 38
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.
20
1
1
45
Test Condition/Comments
Min
Typ
16.67
4
4
55
3
Max
Unit
MHz
V/ns
V/ns
%
ms
Z
o
Ω
Note:
38. IOAPIC clock is CPU/8 for CPU = 133 MHz and CPU/6 for CPU = 100 MHz.
Ordering Information
Ordering Code
W158
Document #: 38-00819
Package
Name
H
Package Type
56-pin SSOP (300 mils)
11
