844008AY-16LF

844008AY-16LF Datasheet

ICS844008-16

Part	Datasheet
844008AY-16LF	844008AY-16LF (pdf)

Related Parts	Information
844008AY-16LFT	844008AY-16LFT

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Integrated Circuit Systems, Inc. ICS844008-16 FEMTOCLOCKS CRYSTAL-TO- LVDS FREQUENCY SYNTHESIZER The ICS844008-16 is an 8 output LVDS Synthesizer optimized to generate PCI Express HiPerClockS reference clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from ICS. Using a 25MHz parallel resonant crystal, the following frequencies can be generated based on F_SEL pin 100MHz or 125MHz. The ICS844008-16 uses ICS’ 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting PCI Express jitter requirements. The ICS844008-16 is packaged in a 32-pin LQFP package. • Eight LVDS outputs • Crystal oscillator interface • Supports the following output frequencies 100MHz or 125MHz • VCO 500MHz • RMS phase jitter 125MHz, using a 25MHz crystal 1.875MHz - 20MHz 0.44ps typical • Full 3.3V supply modes • 0°C to 70°C ambient operating temperature • Available in both standard and lead-free RoHS compliant packages FREQUENCY SELECT FUNCTION TABLE PIN ASSIGNMENT VDDA nPLL_SEL VDD OE2 GND XTAL_OUT XTAL_IN OE1 Input Frequency MHz 25MHz 25MHz Input F_SEL 0 1 M Divider Value 20 N Divider Value 4 M/N Divider Value 5 Output Frequency MHz 125 BLOCK DIAGRAM nPLL_SEL Pulldown 32 31 30 29 28 27 26 25 24 Q7 TABLE ORDERING INFORMATION Part/Order Number Marking Package Shipping Packaging Temperature ICS844008AY-16 ICS844008A16 32 Lead LQFP tube 0°C to 70°C ICS844008AY-16T ICS844008A16 32 Lead LQFP 1000 tape & reel 0°C to 70°C ICS844008AY-16LF 32 Lead "Lead-Free" LQFP tube 0°C to 70°C ICS844008AY-16LFT 32 Lead "Lead-Free" LQFP 1000 tape & reel 0°C to 70°C NOTE parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. The ICS logo is a registered trademark, and HiPerClockS is a trademark of Integrated Circuit Systems, Inc. All other trademarks are the property of their respective owners and may be registered in certain jurisdictions. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated ICS assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments. 844008AY-16

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Integrated Circuit Systems, Inc.

ICS844008-16

FEMTOCLOCKS CRYSTAL-TO-

LVDS FREQUENCY SYNTHESIZER

The ICS844008-16 is an 8 output LVDS

Synthesizer optimized to generate PCI Express

HiPerClockS reference clock frequencies and is a member
of the HiPerClocksTM family of high performance
clock solutions from ICS. Using a 25MHz
parallel resonant crystal, the following frequencies can be
generated based on F_SEL pin 100MHz or 125MHz. The

ICS844008-16 uses ICS’ 3rd generation low phase noise

VCO technology and can achieve <1ps typical rms phase
jitter, easily meeting PCI Express jitter requirements. The

ICS844008-16 is packaged in a 32-pin LQFP package.
• Eight LVDS outputs
• Crystal oscillator interface
• Supports the following output frequencies 100MHz or 125MHz
• VCO 500MHz
• RMS phase jitter 125MHz, using a 25MHz crystal 1.875MHz - 20MHz 0.44ps typical
• Full 3.3V supply modes
• 0°C to 70°C ambient operating temperature
• Available in both standard and lead-free RoHS compliant packages

FREQUENCY SELECT FUNCTION TABLE

PIN ASSIGNMENT

VDDA nPLL_SEL

VDD OE2 GND XTAL_OUT XTAL_IN OE1

Input Frequency

MHz 25MHz
25MHz

Input

F_SEL 0 1

M Divider Value 20

N Divider Value 4

M/N Divider Value 5

Output Frequency

MHz 125

BLOCK DIAGRAM
nPLL_SEL Pulldown
32 31 30 29 28 27 26 25
24 Q7
TABLE ORDERING INFORMATION

Part/Order Number

Marking

Package

Shipping Packaging Temperature

ICS844008AY-16

ICS844008A16
32 Lead LQFP
tube
0°C to 70°C

ICS844008AY-16T

ICS844008A16
32 Lead LQFP
1000 tape & reel
0°C to 70°C

ICS844008AY-16LF
32 Lead "Lead-Free" LQFP
tube
0°C to 70°C

ICS844008AY-16LFT
32 Lead "Lead-Free" LQFP 1000 tape & reel
0°C to 70°C

NOTE parts that are ordered with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.

The ICS logo is a registered trademark, and HiPerClockS is a trademark of Integrated Circuit Systems, Inc. All other trademarks are the property of their respective owners and may be registered in certain jurisdictions.

While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated ICS assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments.
844008AY-16

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived 844008AY-16LF Datasheet file may be downloaded here without warranties.

Datasheet ID: 844008AY-16LF 637128