ics650-44 Integrated Device Technology, ics650-44 Datasheet

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ics650-44

Manufacturer Part Number
ics650-44
Description
Spread Spectrum Clock Synthesizer
Manufacturer
Integrated Device Technology
Datasheet
SPREAD SPECTRUM CLOCK SYNTHESIZER
Description
The ICS650-44 is a spread spectrum clock synthesizer
intended for video projector and digital TV applications. It
generates three copies of an EMI optimized 50 MHz clock
signal (EMI peak reduction of 7 to 14 dB on 3rd through
19th harmonics) through the use of Spread Spectrum
techniques from a 25 MHz crystal or clock input. The
modulation rate is 50 kHz.
Block Diagram
IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER
External capacitors are
required with a crystal
input.
25 MHz crystal
or clock input
X1/CLKIN
X2
FS3:0
Control
Crystal
Logic
OSC
GND
1
Features
NOTE: EOL for non-green parts to occur on 5/13/10
per PDN U-09-01
Spectrum
PLL with
Packaged in 16-pin TSSOP (173 mil)
Supply voltages: VDD = 3.3 V, VDDO = 2.5 V
Peak-to-peak jitter: ±125 ps typ
Output duty cycle 45/55% (worst case)
25 MHz crystal or reference clock input
Zero (0) ppm frequency error on all output clocks
Advanced, low-power CMOS process
Industrial temperature range (-40 to +85°C)
Available in Pb (lead) free package
VDD
Spread
2
3
PDTS
VDDO
50M
50M
50M
ICS650-44
DATASHEET
ICS650-44
REV D 102709

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ics650-44 Summary of contents

Page 1

... SPREAD SPECTRUM CLOCK SYNTHESIZER Description The ICS650- spread spectrum clock synthesizer intended for video projector and digital TV applications. It generates three copies of an EMI optimized 50 MHz clock signal (EMI peak reduction 3rd through 19th harmonics) through the use of Spread Spectrum techniques from a 25 MHz crystal or clock input ...

Page 2

... Center Center Center Center Center Center Down Down Down Down Down Down Down Off ICS650-44 SS Out ±0.25 ±0.50 ±0.75 ±1.00 ±1.25 ±1.50 ±1.75 ±2.00 -0.5 -0.75 -1.0 -1.25 -1.5 -1.75 -2.0 Off REV D 102709 ...

Page 3

... X2 External Components Decoupling Capacitor As with any high-performance mixed-signal IC, the ICS650-44 must be isolated from system power supply noise to perform optimally. A decoupling capacitor of 0.01µF must be connected between each VDD and the PCB ground plane. Series Termination Resistor Clock output traces over one inch should use series termination ...

Page 4

... Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS650-44. These ratings, which are standard values for IDT commercially rated parts, 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 ...

Page 5

... FS3:0, PDTS PU I FS3:0, PDTS, VIN=VDD I R CLK outputs PD C Inputs IN 5 CLOCK SYNTHESIZER Min. Typ. Max. Units 0 VDD 0 VDD 1.8 V 0.6 V ± 360 900 ICS650-44 REV D 102709 ...

Page 6

... Figure 5 t PDTS low to tri-state, DIS Figure 5 t PLL lock-time from P power- final value, Figure 4 6 CLOCK SYNTHESIZER Min. Typ. Max. Units 25 MHz 50 kHz 1 ±125 ps 2 ±180 ICS650-44 REV D 102709 ...

Page 7

... Pb (lead) free package. 5. Bottom marking: (origin) Origin = country of origin of not USA. IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Symbol Conditions Still air JA 1 m/s air flow JA 3 m/s air flow CLOCK SYNTHESIZER Min. Typ. Max. Units 78 C/W 70 C/W 68 C/W 37 C/W ICS650-44 REV D 102709 ...

Page 8

... Figure 2: Duty Cycle Definitions Power Up VCO Ram p PLL Locked Tim e Tim Figure 4: Power Up and PLL Lock Timing Mean value Absolute jitter ( Figure 6: Short Term Jitter Definition ICS650- REV D 102709 ...

Page 9

... BASIC E1 4.30 4.50 0.169 e 0.65 Basic 0.0256 Basic L 0.45 0.75 0.018 aaa -- 0. Package Temperature 16-pin TSSOP -40 to +85 C 16-pin TSSOP -40 to +85 C 16-pin TSSOP -40 to +85 C 16-pin TSSOP -40 to +85 C ICS650-44 Inches Max 0.047 0.006 0.041 0.012 0.008 0.201 0.177 0.030 8 0.004 c REV D 102709 ...

Page 10

... Move from Advance (proposal) to Preliminary. Added ICS part number and LF Griffith 06/14/05 Added “Output-to-Output skew” psec of ±180 ps Griffith 08/03/05 Removed references to SS_EN. D 10/27/09 Added EOL note for non-green parts IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER 10 CLOCK SYNTHESIZER ICS650-44 REV D 102709 ...

Page 11

... ICS650-44 SPREAD SPECTRUM CLOCK SYNTHESIZER 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 © 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc ...

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