ics557-01 Integrated Device Technology, ics557-01 Datasheet

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ics557-01

Manufacturer Part Number
ics557-01
Description
Pci-express Clock Source
Manufacturer
Integrated Device Technology
Datasheet
PCI-EXPRESS CLOCK SOURCE
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 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
IDT™ / ICS™ PCI-EXPRESS CLOCK SOURCE
crystal /clock
25 MHz
Crystal Tuning Capacitors
X1
X2
Oscillator
Crystal
Buffer/
Clock
VDD
GND
Phase Lock
1
Features
Loop
Supports PCI-Express
0.7 V current mode differential pair
Supports LVDS Output Levels
Packaged in 8-pin SOIC
Available in 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
OE
R
R
(IREF)
TM
HCSL Outputs
CLK
CLK
ICS557-01
DATASHEET
ICS557-01
REV H 062607

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ics557-01 Summary of contents

Page 1

... PCI-EXPRESS CLOCK SOURCE Description The ICS557- 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 ...

Page 2

... L = outputs are disabled/tristated). Internal pull-up resistor. Crystal or clock input. Connect MHz crystal or single ended clock. Crystal Connection. Connect to a parallel mode crystal. Leave floating if clock input. Connect to ground. establishes the external reference current. Connect to +3 PCIE SSCG ICS557-01 REV H 062607 ...

Page 3

... Other signal traces should be routed away from the ICS557-01.This includes signal traces just underneath the device layers adjacent to the ground plane layer used by the device. ...

Page 4

... S L2’ L3’ 0.52 V 0.175 V 4 Unit Figure Notes 0.5 max inch 1,2 0.2 max inch 1,2 0.2 max inch 1,2 33 ohm 1,2 49.9 ohm 1,2 Unit Figure Notes inch 1 inch 1 Unit Figure Notes inch 2 inch 2 L4 L4’ PCI-Express Load or Connector ICS557-01 PCIE SSCG REV H 062607 ...

Page 5

... IDT™ / ICS™ PCI-EXPRESS CLOCK SOURCE L1’ L2’ 1250 mV 1150 mV 5 Dimension or Value Unit 0.5 max inch 0.2 max inch 100 ohm 100 ohm 150 ohm L3’ ICS557-01 PCIE SSCG LVDS Device Load REV H 062607 ...

Page 6

... PCI-EXPRESS CLOCK SOURCE Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS557-01. These ratings are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability ...

Page 7

... Max. Units 25 MHz 100 MHz 660 700 850 mV -150 250 350 550 mV 140 175 332 700 ps 175 344 700 ps 125 µs 30 µs 3.0 ms 3.0 ms Min. Typ. Max. Units ° C/W 150 ° C/W 140 ° C/W 120 ° C/W 40 ICS557-01 REV H 062607 ...

Page 8

... Pb (lead) free packaging. 4. Bottom marking: (orgin). Origin = country of origin if not USA. IDT™ / ICS™ PCI-EXPRESS CLOCK SOURCE Marking Diagram 5 4 Marking Diagram (ICS557MI-01 557MI01 ###### YYWW 1 4 (ICS557MI-01LF 557MI01L ###### YYWW 1 4 ICS557-01 PCIE SSCG REV H 062607 ...

Page 9

... SEATING PLANE C .10 (.004) 9 Millimeters Inches* Min Max Min 1.35 1.75 .0532 0.10 0.25 .0040 0.33 0.51 .013 0.19 0.25 .0075 4.80 5.00 .1890 3.80 4.00 .1497 e 1.27 BASIC 0.050 BASIC 5.80 6.20 .2284 h 0.25 0.50 .010 L 0.40 1.27 .016 0 ° 8 ° 0 ° ICS557-01 PCIE SSCG Max .0688 .0098 .020 .0098 .1968 .1574 .2440 .020 .050 8 ° REV H 062607 ...

Page 10

... Tape and Reel 8-pin SOIC Tubes 8-pin SOIC Tape and Reel 8-pin SOIC 10 PCIE SSCG Temperature 0 to +70 ° +70 ° +70 ° +70 ° C -40 to +85 ° C -40 to +85 ° C -40 to +85 ° C -40 to +85 ° C ICS557-01 REV H 062607 ...

Page 11

... ICS557-01 PCI-EXPRESS CLOCK SOURCE Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. 6024 Silver Creek Valley Road San Jose, CA 95138 United States 800 345 7015 +408 284 8200 (outside U.S.) © ...

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