W230-03 Cypress Semiconductor Corp., W230-03 Datasheet - Page 12

• Manufacturer Part Number: W230-03
• Description: Spread Spectrum FTG For Via K7 Chipset
• Manufacturer: Cypress Semiconductor Corp.

24-MHz Clock Output (Lump Capacitance Test Load = 20 pF)
Ordering Information
Document #: 38–01035–**
f
f
m/n
t
t
t
f
Z
W230-03
Parameter
D
R
F
D
ST
o
Frequency, Actual
Deviation from 24 MHz
PLL Ratio
Output Rise Edge Rate
Output Fall Edge Rate
Duty Cycle
Frequency Stabilization
from Power-up (cold start)
AC Output Impedance
Ordering Code
CPUDriver
Clock Chip
CPUCLK_C
CPUCLK_T
Description
47
47
R8
R9
Figure 5. K7 Open Drain Clock Driver Test Circuit
PRELIMINARY
Determined by PLL divider ratio (see m/n below)
(24.004 – 24)/24
(14.31818 MHz x 57/34 = 24.004 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.
Package Name
Test Condition/Comments
3.3
H
Z0 = 52
Length = 5”
T1
Z0 = 52
Length = 5”
T4
-
+
V1
12
VDD
48-pin SSOP (300 mils)
Z0 = 52
Length = 3
Z0 = 52
Length = 3
T2
T5
1.5V
”
1.5V
”
R1
68
R3
68
Package Type
Min.
20p
20p
0.5
0.5
45
24.004
57/34
+167
Typ.
40
Max.
W230-03
55
2
2
3
Unit
MHz
ppm
V/ns
V/ns
ms
%