Description
2 OUTPUT PCI-EXPRESS GEN1 CLOCK SOURCE DATASHEET ICS557-03 .
The ICS557-03 is a spread spectrum clock generator that supports PCI-Express Gen 1 and Ethernet requirements.
Features
* Packaged in 16-pin TSSOP
* RoHS 5 (green) or RoHS 6 (green and lead free)
compliant packaging
* Supports HCSL or LVDS output levels
* Operating voltage of 3.3 V
* Input frequency of 25 MHz
* Jitter 60 ps (cycle-to-cycle)
* Spread Spectrum cap
Applications
* see the 5V41065
* For PCIe Gen3 applications, see the 5V41235
Block Diagram
VDD 2
SS1:SS0 2
S1:S0 2
Control Logic
Phase Lock Loop
X1/ICLK
25 MHz crystal or clock X2
Clock Buffer/ Crystal Oscillator
Optional tuning crystal capacitors
2
GND
OE
CLK0 CLK0
CLK1 CLK1
Rr(IREF)
IDT® 2 O