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CY2XP31

Part Number	CY2XP31
Manufacturer	Cypress Semiconductor
Description	312.5 MHz LVPECL Clock Generator
Published	Jul 30, 2011
Detailed Description	CY2XP31 312.5 MHz LVPECL Clock Generator Features ■ ■ ■ ■ ■ ■ ■ Functional Description The CY2XP31 is a PLL (Phase Loc...
Datasheet	CY2XP31 PDF File

Overview

CY2XP31 312.
5 MHz LVPECL Clock Generator Features ■ ■ ■ ■ ■ ■ ■ Functional Description The CY2XP31 is a PLL (Phase Locked Loop) based high performance clock generator.
It is optimized to generate 10 Gb Ethernet, SONET, and other high performance clock frequencies.
It also produces an output frequency that is 12.
5 times the crystal frequency.
It uses Cypress’s low noise VCO technology to achieve less than 1 ps typical RMS phase jitter, which meets both 10 Gb Ethernet and SONET jitter requirements.
The CY2XP31 has a crystal oscillator interface input and one LVPECL output pair.
One LVPECL output pair Output frequency: 312.
5 MHz External crystal frequency: 25 MHz Low RMS phase jitter at 312.
5 MHz, using 25 MHz crystal (1.
875 MHz to 20 MHz): 0.
3 ps (typical) Pb-free 8-Pin TSSOP package Supply voltage: 3.
3 V or 2.
5 V Commercial and industrial temperature ranges Logic Block Diagram XIN External Crystal XOUT /25 OE CRYSTAL OSCILLATOR PHASE DETECTOR VCO /2 CLK CLK# Pinouts Figure 1.
Pin Diagram – 8-Pin TSSOP VDD VSS XOUT XIN Table 1.
Pin Definition – 8-Pin TSSOP Pin Number 1, 8 2 3, 4 5 6,7 Pin Name VDD VSS XOUT, XIN OE CLK#, CLK Power Power I/O Type 1 2 3 4 8 7 6 5 VDD CLK CLK# OE Description 3.
3 V or 2.
5 V power supply.
All supply current flows through pin 1 Ground Parallel resonant crystal interface Output enable.
When HIGH, the output is enabled.
When LOW, the output is high impedance Differential clock output XTAL Output and Input CMOS Input LVPECL Output www.
DataSheet4U.
net Cypress Semiconductor Corporation Document #: 001-06385 Rev.
*H • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised April 7, 2011 [+] Feedback CY2XP31 Frequency Table Inputs Crystal Frequency (MHz) 25 PLL Multiplier Value 12.
5 Output Frequency (MHz) 312.
5 Absolute Maximum Conditions Parameter VDD VIN[1] TS TJ ESDHBM UL–94 ΘJA[2] Supply Voltage Input Voltage, DC Temperature, Storage Temperature, Junction ESD Protection, Human Body Model Flammability Rating Ther...

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