CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
Integrated Circuit Systems, Inc.
ICS840051I
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR
FEATURES
• 1 LVCMOS/LVT...
Description
Integrated Circuit Systems, Inc.
ICS840051I
FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR
FEATURES
1 LVCMOS/LVTTL output, 15Ω output impedance Crystal oscillator interface designed for 18pF parallel resonant crystals Output frequency range: 70MHz - 170MHz VCO range: 560MHz - 680MHz RMS phase jitter at 155.52MHz (1.875MHz - 20MHz): 0.48ps (typical) RMS phase noise at 155.52MHz Offset Noise Power 100Hz ............... -99.7 dBc/Hz 1KHz ................ -120 dBc/Hz 10KHz ................ -128 dBc/Hz 100KHz ................ -127 dBc/Hz 3.3V or 2.5V operating supply -40°C to 85°C ambient operating temperature Lead-Free fully RoHS compliant
GENERAL DESCRIPTION
The ICS840051I is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS840051I can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The ICS840051I has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. www.DataSheet4U.com
ICS
FREQUENCY TABLE
Inputs Crystal Frequency (MHz) 20.141601 20.141601 19.53125 19.53125 19.44 19.44 18.75 18.75 FREQ_SEL 0 1 0 1 0 1 0 1 Output Frequency (MHz) 161.132812 80.566406 156.25 78.125 155.52 77.76 15 0 75
BLOCK DIAGRAM
OE Pullup FREQ_SEL Pulldown
PIN ASSIGNMENT
VDDA OE XTAL_OUT XTAL_IN Q0 1 2 3 4 8 7 6 5 VDD Q0 GND...
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