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PDF ICS557-08 Data sheet ( Hoja de datos )
| Número de pieza | ICS557-08 | |
| Descripción | 2:1 MULTIPLEXER CHIP | |
| Fabricantes | ICST | |
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ICS557-08
2:1 MULTIPLEXER CHIP FOR PCI-EXPRESS
Description
The ICS557-08 is a 2:1 multiplexer chip that allows the
user to select one of the two HCSL (Host Clock Signal
Level) or LVDS input pairs and fan out to one pair of
differential HCSL or LVDS outputs. This chip is suited
especially for PCI-Express applications, where there is
a need to select the PCI-Express clock either locally
from the PCI-E card or from the motherboard.
Features
• Packaged in 16-pin TSSOP
• Available in Pb (lead) free package
• Operating voltage of 3.3 V
• Low power consumption
• Input clock frequency of up to 200 MHz for HCSL and
up to 100 MHz for LVDS
• Jitter 60 ps (cycle-to-cycle)
Block Diagram
VDD
3
OE
IN1
IN1
MUX
IN2 2 to 1
IN2
CLK
CLK
3
SEL GND
PD
Rr (IREF)
MDS 557-08 C
1
Revision 021606
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
1 page  
ICS557-08
2:1 Multiplexer Chip for PCI-Express
PCI-Express Layout Guidelines
Common Recommendations for Differential Routing
L1 length, Route as non-coupled 50 ohm trace.
L2 length, Route as non-coupled 50 ohm trace.
L3 length, Route as non-coupled 50 ohm trace.
RS
RT
Dimension or Value
0.5 max
0.2 max
0.2 max
33
49.9
Unit
inch
inch
inch
ohm
ohm
Differential Routing on a Single PCB
L4 length, Route as coupled microstrip 100 ohm differential trace.
L4 length, Route as coupled stripline 100 ohm differential trace.
Dimension or Value
2 min to 16 max
1.8 min to 14.4 max
Unit
inch
inch
Differential Routing to a PCI Express Connector
Dimension or Value Unit
L4 length, Route as coupled microstrip 100 ohm differential trace.
0.25 to 14 max
inch
L4 length, Route as coupled stripline 100 ohm differential trace. 0.225 min to 12.6 max inch
PCI-Express Device Routing
ICS557-08
Output
Clock
L1
RS
L1’
RS
L2
L2’
RT RT
L3’ L3
L4
L4’
PCI-Express
Load or
Connector
Typical PCI-Express (HCSL)
Waveform
700 mV
0
tOR 500 ps 500 ps tOF
0.525 V
0.175 V
0.525 V
0.175 V
MDS 557-08 C
5
Revision 021606
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page 
ICS557-08
2:1 Multiplexer Chip for PCI-Express
Revision History
Rev.
C
Originator
D.Chan
Date Description of Change
02/16/06 Added industrial temp range; updated PCI-Express Waveform diagram to include 0.525 V;
changed “Supply Voltage, VDD” spec in Absolute Max. Ratings from 5.5 V to 7 V; changed
CLKOUT to CLK and CLK ; added marking diagrams for I-temp device.
MDS 557-08 C
11
Revision 021606
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ICS557-08.PDF ] | |
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