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CY2XP22

Part Number	CY2XP22
Manufacturer	Cypress Semiconductor
Description	Crystal to LVPECL Clock Generator
Published	Jul 30, 2011
Detailed Description	CY2XP22 Crystal to LVPECL Clock Generator Features ■ ■ ■ ■ ■ ■ ■ ■ ■ Pb-free 8-Pin TSSOP package Supply voltage: 3.3 V...
Datasheet	CY2XP22 PDF File

Overview

CY2XP22 Crystal to LVPECL Clock Generator Features ■ ■ ■ ■ ■ ■ ■ ■ ■ Pb-free 8-Pin TSSOP package Supply voltage: 3.
3 V or 2.
5 V Commercial and Industrial temperature ranges One LVPECL output pair Selectable frequency multiplication: x2.
5 or x5 External crystal frequency: 25.
0 MHz Output frequency: 62.
5 MHz or 125 MHz Low RMS phase jitter at 125 MHz, using 25 MHz crystal (1.
875 MHz to 20 MHz): 0.
4 ps (typical) Phase noise at 125 MHz (typical): Offset 1 kHz 10 kHz 100 kHz 1 MHz Noise Power –117 dBc/Hz –126 dBc/Hz –131 dBc/Hz –131 dBc/Hz Functional Description The CY2XP22 is a PLL (Phase Locked Loop) based high performance clock generator that uses an external reference crystal.
It is specifically targeted at FibreChannel and Gigabit Ethernet applications.
It produces a selectable output frequency that is 2.
5 or 5 times the crystal frequency.
With a 25 MHz crystal, the user can select either a 62.
5 MHz or 125 MHz output.
It uses Cypress’s low noise VCO technology to achieve less than 1 ps typical RMS phase jitter.
The CY2XP22 has a crystal oscillator interface input and one LVPECL output pair.
Logic Block Diagram XIN External Crystal XOUT CRYSTAL OSCILLATOR LOW -NOISE PLL OUTPUT DIVIDER CLK CLK# F _SEL Pinouts Figure 1.
Pin Diagram – 8-Pin TSSOP VDD VSS XOUT XIN Table 1.
Pin Definitions – 8-Pin TSSOP Pin Number 1, 8 2 3, 4 5 6,7 Pin Name VDD VSS XOUT, XIN F_SEL CLK#, CLK Power Power I/O Type 1 2 3 4 8 7 6 5 VDD CLK CLK# F_SEL Description 3.
3 V or 2.
5 V power supply Ground Parallel resonant crystal interface Frequency Select: see Frequency Table Differential clock output XTAL output and input CMOS input LVPECL output www.
DataSheet4U.
net Cypress Semiconductor Corporation Document #: 001-10229 Rev.
*F • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised April 11, 2011 [+] Feedback CY2XP22 Frequency Table Inputs Crystal Frequency (MHz) 25 F_SEL 0 1 PLL Multiplier Value 5 2.
5 Output Frequency (MHz) 125 62.
5 Absolute Maximum Conditions...

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