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PCS3P2537A Datasheet

Peak EMI Reduction IC

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PCS3P2537A
Peak EMI Reduction IC
Features
1x Peak EMI Reduction IC
Input Frequency: 18MHz-36MHz
Output Frequency: 18MHz-36MHz
Frequency Deviation @ 27MHz: -0.25%
Modulation Rate @ 27MHz: 30.1KHz
Supply Voltage: 3.3V ± 0.3V
Operating current less than 8mA @ 27MHz
Spread Spectrum Enable Control
CMOS design
8L-WDFN (8L-TDFN) package
Product Description
PCS3P2537A is a 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 and shielding and other passive
components that are traditionally required to pass EMI
regulations.
PCS3P2537A modulates the output of wa wswing.DleatPaSLhLeeint4U.com
order to “spread” the bandwidth of a synthesized clock,
and more importantly, decreases the peak amplitudes of
its harmonics. This result 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.’
PCS3P2537A has a frequency range of 18MHz-36MHz,
and accepts input clock either from a Crystal or from an
external reference and locks on to it delivering a 1x
spread spectrum clock output. It has an SSON control for
enabling and disabling Spread Spectrum function.
PCS3P2537A operates with a supply voltage of 3.3V, and
is available in 8 L-WDFN package.
Application
PCS3P2537A is targeted towards PC peripheral devices
and embedded systems.
Block Diagram
VDD
SSON
CLKIN / XIN
XOUT
Crystal
Oscillator
PLL
ModOUT
GND
©2010 SCILLC. All rights reserved.
JANUARY 2010 – Rev. 1
Publication Order Number:
PCS3P2537/D


  ON Semiconductor Electronic Components Datasheet  

PCS3P2537A Datasheet

Peak EMI Reduction IC

No Preview Available !

Pin Configuration (8L-WDFN Package)
PCS3P2537A
CLKIN / XIN 1
XOUT 2
SSON 3
NC 4
PCS3P2537A
8 VDD
7 NC
6 ModOUT
5 GND
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Pin Description
Pin# Pin Name
1 CLKIN / XIN
2 XOUT
3 SSON
4 NC
5 GND
6 ModOUT
7 NC
8 VDD
Type
I
O
I
Description
External reference Clock input or Crystal connection. This pin has dual functions. It can
be connected either to an external crystal or an external reference clock.
Crystal connection. If using an external reference, this pin must be left unconnected.
When SSON is HIGH, the spread spectrum is enabled and when LOW, it turns off the
spread spectrum.
No Connect.
P Ground connection.
O Spread Spectrum Clock Output.
No Connect.
P Power supply for the entire chip.
Rev. 1 | Page 2 of 7 | www.onsemi.com


Part Number PCS3P2537A
Description Peak EMI Reduction IC
Maker ON Semiconductor
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PCS3P2537A Datasheet PDF






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