CY2XP24
Crystal to LVPECL Clock Generator
Features Functional Description
One LVPECL Output Pair The CY2XP24 is a PLL (phase locked loop) based high
performance clock generator. It is optimized to generate 10 Gb
Selectable output frequency: 156.25 MHz or 187.5 MHz
Ethernet, Fibre Channel, and other high performance clock
frequencies. It produces an output frequency that is either 6.25
External crystal frequency: 25 MHz
times or 7.5 times the crystal frequency. It uses Cypresss low
Low root mean square (RMS) phase jitter at 156.25 MHz, using
noise VCO technology to achieve low phase jitter, that meets
25 MHz crystal (1.875 MHz to 20 MHz): 0.33 ps (typical)
both 10 Gb Ethernet, Fibre Channel, and SATA jitter
requirements. The CY2XP24 has a crystal oscillator interface
Pb-free 8-Pin thin shrunk small outline package (TSSOP)
input and one LVPECL output pair.
Package
Supply voltage: 3.3 V or 2.5 V
Commercial and industrial temperature ranges
Logic Block Diagram
XIN
CLK
External CRYSTAL PHASE
VCO /4
Crystal OSCILLATOR DETECTOR
CLK#
XOUT
0 = /25
1 = /30
F_SEL
Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600
Document #: 001-15705 Rev. *G Revised April 7, 2011
[+] Feedback
CY2XP24
Contents
Pinouts ..............................................................................3 Termination for LVPECL Output .................................. 7
Frequency Table ...............................................................4 Crystal Input Interface ................................................. 7
Absolute Maximum Conditions .......................................4 Ordering Information ........................................................ 8
Operating Conditions .......................................................4 Ordering Code Definition ............................................. 8
DC Electrical Characteristics ..........................................4 Acronyms ........................................................................10
AC Electrical Characteristics ...........................................5 Document Conventions ................................................. 10
Recommended Crystal Specifications ............................5 Units of Measure ....................................................... 10
Parameter Measurements ................................................6 Sales, Solutions, and Legal Information ...................... 12
Application Information ...................................................7 Worldwide Sales and Design Support ....................... 12
Power Supply Filtering Techniques .............................7 Products ....................................................................12
PSoC Solutions ......................................................... 12
Document #: 001-15705 Rev. *G Page 2 of 12
[+] Feedback