557M-01LF Datasheet, PDF (1/10 Pages) Integrated Device Technology – PCI-EXPRESS GEN1 CLOCK SOURCE

PCI-EXPRESS GEN1 CLOCK SOURCE
DATASHEET
ICS557-01
Description
The ICS557-01 is a clock chip designed for use in
PCI-Express Cards as a clock source. It provides a pair of
differential outputs at 100 MHz in a small 8-pin SOIC
package.
Using IDT’s patented Phase-Locked Loop (PLL)
techniques, the device takes a 25 MHz crystal input and
produces HCSL (Host Clock Signal Level) differential
outputs at 100 MHz clock frequency. LVDS signal levels can
also be supported via an alternative termination scheme.
Features
• Supports PCI-Express^TM HCSL Outputs
0.7 V current mode differential pair
• Supports LVDS Output Levels
• Packaged in 8-pin SOIC
• RoHS 5 (green) or RoHS 6 (green and lead free)
compliant packaging
• Operating voltage of 3.3 V
• Low power consumption
• Input frequency of 25 MHz
• Short term jitter 100 ps (peak-to-peak)
• Output Enable via pin selection
• Industrial temperature range available
• For PCIe Gen2 applications, see the 5V41064
• For PCIe Gen3 applications, see the 5V41234
Block Diagram
VDD
X1
25 MHz
crystal /clock
X2
Clock
Buffer/
Crystal
Oscillator
Phase Lock
Loop
Crystal Tuning Capacitors
GND
OE
CLK
CLK
R_R(IREF)
IDT® PCI-EXPRESS GEN1 CLOCK SOURCE
1
ICS557-01 REV P 072512