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Número de pieza | ICS557-01 | |
Descripción | PCI-EXPRESS CLOCK SOURCE | |
Fabricantes | ICST | |
Logotipo | ||
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ICS557-01
PCI-EXPRESS CLOCK SOURCE
Description
Features
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 ICS’ 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.
Block Diagram
• Supports PCI-ExpressTM HCSL Outputs
0.7 V current mode differential pair
• Supports LVDS Output Levels
• Packaged in 8-pin SOIC
• Available in Pb (lead) free package
• 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
VDD
25 MHz
crystal /clock
X1
X2
Clock
Buffer/
Crystal
Oscillator
Phase Lock
Loop
Crystal Tuning Capacitors
GND
OE
CLK
CLK
RR(IREF)
MDS 557-01 F
1
Revision 011606
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
1 page LVDS Compatible Layout Guidelines
LVDS Recommendations for Differential Routing
L1 length, Route as non-coupled 50 ohm trace.
L2 length, Route as non-coupled 50 ohm trace.
RP
RQ
RT
L3 length, Route as coupled 50 ohm differential trace.
L3 length, Route as coupled 50 ohm differential trace.
ICS557-01
PCI-EXPRESS CLOCK SOURCE
Dimension or Value
0.5 max
0.2 max
100
100
150
Unit
inch
inch
ohm
ohm
ohm
Figure 3: LVDS Device Routing
ICS557-01
Clock
Output
L1
RQ
L1’
RT
RT
L2’ L2
Typical LVDS Waveform
1325 mV
1000 mV
tOR
500 ps
1250 mV
1150 mV
500 ps
tOF
1250 mV
1150 mV
L3
L3’
RP
LVDS
Device
Load
MDS 557-01 F
5
Revision 011606
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page |
Páginas | Total 10 Páginas | |
PDF Descargar | [ Datasheet ICS557-01.PDF ] |
Número de pieza | Descripción | Fabricantes |
ICS557-01 | PCI-EXPRESS CLOCK SOURCE | ICST |
ICS557-03 | PCI-EXPRESS CLOCK SOURCE | ICST |
ICS557-05A | Quad Differential PCI-Express Clock Source | ICST |
ICS557-06 | ONE TO FOUR HCSL CLOCK BUFFER | ICST |
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