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Cypress Semiconductor Electronic Components Datasheet

CY24293 Datasheet

Two Outputs PCI-Express Clock Generator

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CY24293
Two Outputs PCI-Express Clock Generator
Two Outputs PCI-Express Clock Generator
Features
25 MHz crystal or clock input
Two sets of differential PCI-Express clocks
Pin selectable output frequencies
Supports HCSL compatible output levels
Spread Spectrum capability on all output clocks with pin
selectable spread range
16-pin TSSOP package
Operating voltage 3.3 V
Commercial, Industrial operating temperature range
Functional Description
CY24293 is a two output PCI-Express clock generator device
intended for networking applications. The device takes 25 MHz
crystal or clock input and provides two pairs of differential outputs
at 25 MHz, 100 MHz, 125 MHz, or 200 MHz for HCSL signaling
standard.
The device incorporates Lexmark Spread Spectrum profile for
maximum electromagnetic interference (EMI) reduction. The
spread type and amount can be selected using select pins.
For a complete list of related documentation, click here.
Logic Block Diagram
VDDX
VDDO
XIN/EXCLKIN
(25 MHz)
XOUT
SS0
SS1
S0
S1
OE
Clock Buffer/
Crystal
Oscillator
Control
Logic
PLL Clock
Synthesizer
PCIE0P
PCIE0N
PCIE1P
PCIE1N
GNDX
GNDO
I REF
R REF= 475 Ohms 1%
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-46117 Rev. *J
• San Jose, CA 95134-1709 • 408-943-2600
Revised June 27, 2017


Cypress Semiconductor Electronic Components Datasheet

CY24293 Datasheet

Two Outputs PCI-Express Clock Generator

No Preview Available !

CY24293
Contents
Pinouts .............................................................................. 3
Pin Definitions .................................................................. 3
Output Frequency Selection Table ................................. 4
Spread Selection Table .................................................... 4
Application Information ................................................... 5
Crystal Recommendations .......................................... 5
Crystal Loading ........................................................... 5
Calculating Load Capacitors ....................................... 5
Current Source (Iref) Reference Resistor .................... 5
Output Termination ...................................................... 6
Decoupling Capacitors ................................................ 6
PCI-Express (HCSL Compatible) Layout Guidelines .... 6
Absolute Maximum Ratings ............................................ 7
Recommended Operation Conditions ............................ 7
DC Electrical Characteristics .......................................... 7
Thermal Resistance .......................................................... 7
AC Electrical Characteristics .......................................... 8
AC Electrical Characteristics .......................................... 9
Test and Measurement Setup .......................................... 9
Ordering Information ...................................................... 10
Ordering Code Definitions ......................................... 10
Package Diagram ............................................................ 11
Acronyms ........................................................................ 12
Document Conventions ................................................. 12
Units of Measure ....................................................... 12
Document History Page ................................................. 13
Sales, Solutions, and Legal Information ...................... 15
Worldwide Sales and Design Support ....................... 15
Products .................................................................... 15
PSoC® Solutions ...................................................... 15
Cypress Developer Community ................................. 15
Technical Support ..................................................... 15
Document Number: 001-46117 Rev. *J
Page 2 of 15


Part Number CY24293
Description Two Outputs PCI-Express Clock Generator
Maker Cypress
Total Page 15 Pages
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