W158 Datasheet, PDF (11/12 Pages) Cypress Semiconductor – Spread Spectrum System Frequency Synthesizer

W158
IOAPIC Clock Outputs, IOAPIC0:2 (Lump Capacitance Test Load = 20 pF)
Parameter
Description
Test Condition/Comments
Min Typ Max
f
Frequency
Note 39
16.67
t_R
Output Rise Edge Rate Measured from 0.4V to 2.0V
1
4
t_F
Output Fall Edge Rate
Measured from 2.0V to 0.4V
1
4
t_D
Duty Cycle
Measured on rising and falling edge at 1.25V 45
55
f_ST
Frequency Stabilization Assumes full supply voltage reached within
3
from Power-up (cold start) 1 ms from power-up. Short cycles exist prior to
frequency stabilization.
Z_o
AC Output Impedance
Average value during switching transition. Used
20
for determining series termination value.
Note:
39. IOAPIC clock is CPU/8 for CPU = 133 MHz and CPU/6 for CPU = 100 MHz.
Unit
MHz
V/ns
V/ns
%
ms
:
Rev 1.0, November 21, 2006
Page 11 of 12