W164
| Model | W164 |
| Description | Spread Spectrum Desktop/Notebook System Frequency Generator |
| PDF file | Total 11 pages (File size: 140K) |
| Chip Manufacturer | CYPRESS |
W164
48-MHz and 24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
CPU = 66.8/100 MHz
Parameter
f
f
D
m/n
t
R
t
F
t
D
f
ST
Description
Frequency, Actual
Deviation from 48 MHz
PLL Ratio
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization
from Power-up (cold start)
AC Output Impedance
Test Condition/Comments
Determined by PLL divider ratio (see m/n below)
(48.008 – 48)/48
(14.31818 MHz x 57/17 = 48.008 MHz)
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 fre-
quency stabilization.
Average value during switching transition. Used
for determining series termination value.
25
0.5
0.5
45
Min.
Typ.
48.008
24.004
+167
57/17, 57/34
2
2
55
3
V/ns
V/ns
%
ms
Max.
Unit
MHz
ppm
Z
o
Ω
Ordering Information
Ordering Code
W164
Document #: 38-00841
Package
Name
G
Package Type
28-pin SOIC (300 mils)
10
