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PDF PCS3P8103A Data sheet ( Hoja de datos )
| Número de pieza | PCS3P8103A | |
| Descripción | General Purpose Peak EMI Reduction IC | |
| Fabricantes | ON Semiconductor | |
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PCS3P8103A
General Purpose Peak EMI
Reduction IC
Features
• Generates a 4x low EMI spread spectrum clock
• Input Frequency: 16.667MHz
• Output Frequency: 66.66MHz
• Tri-level frequency Deviation Selection:
• Down Spread, Center Spread and No Spread
• Low inherent Cycle-to-Cycle Jitter
• Supply Voltage: 3.3V±0.3V
• LVCMOS Input and output
• 6L-TSOT-23 (6L-TSOT-26) Package
Product Description
The PCS3P8103A is a versatile spread spectrum
frequency modulator designed specifically to provide a 4x
output of 66.66MHz from an input clock of 16.667MHz.
The PCS3P8103A reduces electromagnetic interference
(EMI) at the clock source, allowing system wide reduction
of EMI of down stream clock and data dependent signals.
It allows significant system cost savings by reducing the
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number of circuit board layers, ferrite beads, shielding,
and other passive components that are traditionally
required to pass EMI regulations.
The custom device can generate an EMI reduced clock
from crystal, or system clock.
The PCS3P8103A has a 3 level logic control SS% for
selecting Center Spread, Down Spread and No-Spread
options. Refer to Output Frequency Deviation table.
The PCS3P8103A operates from a 3.3V±0.3V supply
Voltage and is available in a 6L-TSOT-23 package.
Application
The PCS3P8103A is targeted towards EMI management
in applications such as LCD Panels, MFPs, Digital
copiers, Networking, PC peripheral devices, consumer
electronics, and embedded controller systems.
Block Diagram
SS%
VDD
XIN /CLKIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
r
Modulation
control
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
VSS
©2010 SCILLC. All rights reserved.
APRIL 2010 – Rev. 2
Publication Order Number:
PCS3P8103A/D
1 page  
PCS3P8103A
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
16.667MHz
Frequency tolerance
Operating temperature range
± 50ppm or better at 25°C
-25°C to +85°C
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Storage temperature
-40°C to +85°C
Load capacitance
18pF
Shunt capacitance
7pF maximum
ESR
25Ω
Note: CL is Load Capacitance and Rx is used to prevent oscillations at overtone frequency of the Fundamental frequency.
Typical Crystal Interface Circuit
R
Crystal
Rx
CL CL
CL = 2*(CP – CS),
Where CP = Load capacitance of crystal.
CS = Stray capacitance due to CIN, PCB, Trace, etc.
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet PCS3P8103A.PDF ] | |
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