ICS557G-05AT IDT, Integrated Device Technology Inc, ICS557G-05AT Datasheet

no-image

ICS557G-05AT

Manufacturer Part Number
ICS557G-05AT
Description
IC CLK SOURCE QUAD DIFF 20-TSSOP
Manufacturer
IDT, Integrated Device Technology Inc
Type
Clock Generatorr
Datasheet

Specifications of ICS557G-05AT

Input
Clock, Crystal
Output
HCSL, LVDS
Frequency - Max
200MHz
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Frequency-max
200MHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
557G-05AT
QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
Description
The ICS557-05A is a spread-spectrum clock generator that
supports PCI-Express requirements. It is used in PC or
embedded systems to substantially reduce
electro-magnetic interference (EMI). The device provides
four differential HCSL or LVDS high-frequency outputs with
spread spectrum capability. The output frequency and
spread type are selectable using external pins.
Block Diagram
IDT® QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE
crystal or
25 MHz
clock
Optional tuning crystal
capacitors
SEL[2:0]
X2
X1
3
Spectrum/
Oscillator
selection
Spread
Output
Clock
clock
GND
VDD
Spectrum
PLL Clock
Synthesis
2
Circuitry
2
1
Spread
Features
Packaged in 20-pin TSSOP
RoHS 5 (green) or RoHS 6 (green and lead free)
complaint package
Supports PCI-Express applications
Four differential spread spectrum clock outputs
Spread spectrum for EMI reduction
Uses external 25 MHz clock or crystal input
Power down pin turns off chip
OE control tri-states outputs
Spread and frequency selection via external pins
Spread Bypass option available
Industrial temperature range available
PD
Rr(IREF)
OE
CLKOUTB
CLKOUTA
CLKOUTA
CLKOUTD
CLKOUTD
CLKOUTB
CLKOUTC
CLKOUTC
ICS557-05A
DATASHEET
ICS557-05A
REV N 032311

Related parts for ICS557G-05AT

ICS557G-05AT Summary of contents

Page 1

QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Description The ICS557-05A is a spread-spectrum clock generator that supports PCI-Express requirements used embedded systems to substantially reduce electro-magnetic interference (EMI). The device provides four differential HCSL or LVDS high-frequency ...

Page 2

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Pin Assignment 1 VDDXD GNDXD 9 IREF 10 20-pin (173 mil) TSSOP Spread Spectrum Selection Table Spread% ...

Page 3

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Pin Descriptions Pin Pin Pin Name Type 1 VDDXD Power 2 S0 Input 3 S1 Input 4 S2 Input 5 X1 Input 6 X2 Output Crystal connection. Connect to a fundamental mode crystal or ...

Page 4

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Application Information Decoupling Capacitors As with any high-performance mixed-signal IC, the ICS557-05A must be isolated from system power supply noise to perform optimally. Decoupling capacitors of 0.01µF must be connected between each VDD and ...

Page 5

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Output Structures IREF =2.3 mA See Output Termination Sections - Pages Ω R 475 R General PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines ...

Page 6

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE 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 ...

Page 7

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE LVDS Compatible Layout Guidelines Alternative T ermination for LVDS and other Common Differential Signals Vdiff Vp-p Vcm 0.45v 0.22v 1.08 0.58 0.28 0.6 0.80 0.40 0.6 0.60 0.3 1.2 R1a = R1b = R1 ...

Page 8

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS557-05A. These ratings are stress ratings only. Functional operation of the device at these or any other conditions above ...

Page 9

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE AC Electrical Characteristics - CLKOUT, HCSL Unless stated otherwise, VDD=3.3 V ±5%, Ambient Temperature -40 to +85° C Parameter Symbol Input Frequency Output Frequency 1,2 Output High Voltage V OH 1,2 Output Low Voltage ...

Page 10

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE AC Electrical Characteristics - CLKOUT, LVDS Unless stated otherwise, VDD=3.3 V ±5%, Ambient Temperature -40 to +85° C Parameter Input Frequency Output Frequency Differential Output Voltage Offset Voltage ∆ ∆ ...

Page 11

ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE Package Outline and Package Dimensions Package dimensions are kept current with JEDEC Publication No INDEX AREA Ordering Information Part / Order Number Marking 557G-05ALF 557G-05ALF 557G-05ALFT 557G-05ALF ...

Page 12

ICS557-05A QUAD DIFFERENTIAL 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. www.idt.com © 2011 Integrated Device Technology, Inc. All rights reserved. Product specifications ...

Related keywords