PCS3P2005A Datasheet, PDF (1/7 Pages) ON Semiconductor – General Purpose Peak EMI Reduction IC

PCS3P2005A
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General Purpose Peak EMI
Reduction IC
Description
PCS3P2005A is a versatile, 3.3 V/5 V, 1x spread spectrum
frequency modulator designed to reduce electromagnetic interference
(EMI) at the clock source, allowing system wide reduction of EMI of
down stream clock and data dependent signals. The device allows
significant system cost savings by reducing the number of circuit
board layers ferrite beads, shielding and other passive components that
are traditionally required to pass EMI regulations.
PCS3P2005A modulates the output of a PLL in order to “spread”
the bandwidth of a synthesized clock, and more importantly, decreases
the peak amplitudes of its harmonics. This results in significantly
lower system EMI compared to the typical narrow band signal
produced by oscillators and most frequency generators. Lowering
EMI by increasing a signal’s bandwidth is called ‘spread spectrum
clock generation.’
PCS3P2005A accepts an input from an external reference clock and
locks to a 1x modulated clock output. Two logic pins S0 and D_C
enable selecting one of the 4 different frequency deviations. Refer to
the Deviation Selection Table for more details. Frequency Range
Selection pin enables operation in one of the two frequency ranges.
PCS3P2005A operates over a supply voltage range of 5 V / 3.3 V.
PCS3P2005A is available in 8 Pin TSSOP and SOIC Packages, over
Commercial and Industrial temperature range.
Applications
PCS3P2005A is targeted for use in a broad range of notebook and
desktop PCs and consumer electronic applications.
Features
• 1x, LVCMOS Peak EMI Reduction
• Input Frequency:
10 MHz − 30 MHz @ 3.3 V
30 MHz − 100 MHz @ 5 V
• Output Frequency:
10 MHz − 30 MHz @ 3.3 V
30 MHz − 100 MHz @ 5 V
• Four Different Frequency Deviation Selection
• Selectable Spread Options: Down Spread and Center Spread
• Frequency Range Selection
• Supply Voltage:
5 V ± 0.5 V
3.3 V ± 0.3 V
• 8 Pin TSSOP, SOIC Package
• Commercial and Industrial Temperature Range
• These are Pb−Free Devices
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
SOIC−8
S SUFFIX
CASE 751BD
TSSOP−8
T SUFFIX
CASE 948AL
PIN CONFIGURATION
1
CLKIN / XIN
VDD
XOUT
ModOUT
D_C
FRS
GND
S0
PCS3P2005A
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
1
August, 2011 − Rev. P2
Publication Order Number:
PCS3P2005A/D