650GI-41LF IDT, 650GI-41LF Datasheet

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650GI-41LF

Manufacturer Part Number
650GI-41LF
Description
Clock Drivers & Distribution SYSTEM PERIPHERAL CLOCK SOURCE
Manufacturer
IDT
Datasheet

Specifications of 650GI-41LF

Rohs
yes
Part # Aliases
ICS650GI-41LF
SPREAD SPECTRUM CLOCK SYNTHESIZER
Description
The ICS650-41 is a spread spectrum clock synthesizer
intended for video projector applications. It generates 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. For the 50 MHz output, the modulation rate is
50 kHz.
In addition to the EMI optimized clock signal, the device
generates a 48 MHz clock for USB.
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
SS_EN
FS3:0
Crystal
Control
Logic
OSC
GND
1
VDD
PLL1 with
Spectrum
Features
Spread
2
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)
Guarantees +85°C operational condition
25 MHz crystal or reference clock input
Zero (0) ppm frequency error on all output clocks
Advanced, low-power CMOS process
Industrial temperature range
3
PLL2
VDDO
PDTS
50M
48M
ICS650-41
DATASHEET
ICS650-41
REV G 102709

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650GI-41LF Summary of contents

Page 1

... MHz crystal or clock input X1/CLKIN X2 External capacitors are required with a crystal input. FS3:0 SS_EN IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Features • Packaged in 16-pin TSSOP (173 mil) • Supply voltages: VDD = 3.3 V, VDDO = 2.5 V • Peak-to-peak jitter: ±125 ps typ • ...

Page 2

... SPREAD SPECTRUM CLOCK SYNTHESIZER Pin Assignment X1/CLKIN 1 FS0 2 FS1 3 SS_EN 4 VDD 5 GND 6 FS3 7 48M 8 16-pin (173 mil) TSSOP IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Spread Spectrum and Output Configuration Table X2 16 FS3 FS2 FS1 VDD 15 0 PDTS 14 0 FS2 0 13 VDD ...

Page 3

... The nominal impedance of the clock output Crystal Load Capacitors The device crystal connections should include pads for IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Pin Type Input Crystal input. Connect this pin MHz crystal or external input clock ...

Page 4

... Stresses above the ratings listed below can cause permanent damage to the ICS650-41. 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

... Output High Voltage Output Low Voltage Short Circuit Current Nominal Output Impedance Internal Pull-up Resistor Input Leakage Current Internal Pull-down Resistor Input Capacitance IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Symbol Conditions no load IDD PDTS = 0, no load no load IDDO PDTS = 0, no load V ...

Page 6

... Output Fall Time Output Rise Time One Sigma Clock Period Jitter Absolute Jitter, Peak-to-Peak Output Enable Time Output Disable Time Power-up Time Note 1: Measured with 15 pF load. IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Symbol Conditions F Crystal or clock input ...

Page 7

... Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Marking Diagram 16 650GI41L ###### YYWW 1 Notes: 1. ###### is the lot number. 2. YYWW is the last two digits of the year and the week number that the part was assembled. IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER ...

Page 8

... Clock Output Figure 3: Rise and Fall Time Definitions 1. utputs Figure 5: PDTS to Stable Clock Output Timing IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER Outputs C LOAD VDD 4 VDDO 80% of VDDO 0V 20% of VDDO VDD ...

Page 9

... Part / Order Number Marking 650GI-41LF 650GI41L 650GI-41LFT 650GI41L "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied ...

Page 10

... ID spec to 4 ma, updated graphs on page 8 to reflect separate VDDO and correct bypass capacitor value, updated marking diagram and ordering table to reflect Pb-free device. G 10/27/09 Updated ordering information IDT™ / ICS™ SPREAD SPECTRUM CLOCK SYNTHESIZER , ,. ...

Page 11

... 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. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners ...

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