P2040A-08-SR ALSC [Alliance Semiconductor Corporation], P2040A-08-SR Datasheet

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P2040A-08-SR

Manufacturer Part Number
P2040A-08-SR
Description
LCD Panel EMI Reduction IC
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
October 2005
rev 1.2
Features
Product Description
The P2040A is a versatile spread spectrum frequency
modulator designed specifically for digital flat panel
Block Diagram
CLKIN
2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
FCC approved method of EMI attenuation.
Provides up to 20dB of EMI suppression.
Generates a low EMI spread spectrum clock of the
Input frequency range: 30MHz to 100MHz.
Optimized for VGA, SVGA, and higher resolution
Internal loop filter minimizes external components
Six selectable high spread ranges up to ± 2%.
Two selectable modulation rates.
SSON# control pin for spread spectrum enable and
Low cycle-to-cycle jitter.
Wide operating range.
Low power CMOS design.
Supports
Products available for automotive temperature
Available in 8-pin SOIC and TSSOP Packages.
input frequency.
XGA LCD Panels.
and board space.
disable options.
specifications.
range. (Refer Spread Spectrum Range Selection
Tables)
most
mobile
Notice: The information in this document is subject to change without notice.
Frequency
Feedback
Divider
Divider
graphic
LCD Panel EMI Reduction IC
Alliance Semiconductor
accelerator
SR0 SR1 MRA
Modulation
Detector
Phase
SSON#
applications.
interference (EMI) at the clock source, allowing system
wide reduction of EMI of down stream clock and data
dependent signals. The P2040A allows significant system
cost savings by reducing the number of circuit board
layers ferrite beads,
components that are traditionally required to pass EMI
regulations.
The P2040A uses the most efficient and optimized
modulation profile approved by the FCC and
implemented in a proprietary all digital method.
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’.
Applications
The P2040A is targeted towards digital flat panel
applications for notebook PCs, palm-size PCs, office
automation equipments and LCD monitors.
The P2040A modulates the output of a single PLL in
Loop
Filter
VDD
VSS
The
P2040A
VCO
PLL
shielding and other passive
reduces
Divider
Output
P2040A
electromagnetic
ModOUT
is

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P2040A-08-SR Summary of contents

Page 1

... The P2040A uses the most efficient and optimized modulation profile approved by the FCC and implemented in a proprietary all digital method. The P2040A modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, and more importantly, decreases the peak amplitudes of its harmonics ...

Page 2

... P2040A ModOUT 3 6 SR1 SSON# 4 VSS 5 Description Spreading Range ± 1.125 ± 1.75 ± 0.75 ± 1.25 ± 1.25 ± 2.00 Reserved Reserved LCD Panel EMI Reduction IC P2040A Modulation Rate (KHz) (FIN /40) * 34.72KHz (FIN /40) * 34.72KHz (FIN /40) * 34.72KHz (FIN /40) * 34.72KHz (FIN /40) * 20.83KHz (FIN /40) * 20.83KHz Reserved Reserved ...

Page 3

... Notice: The information in this document is subject to change without notice. Spreading Range ± 1.25 ± 2.00 ± 1.00 ± 1.50 ± 1.25 ± 2.00 ± 1.25 ± 2.00 Spreading Range ± 1.00 ± 1.50 ± 0.70 ± 1.00 ± 1.15 ± 2.00 ± 1.15 ± 1.75 LCD Panel EMI Reduction IC P2040A Modulation Rate (F /40) * 34.72KHz IN (F /40) * 34.72KHz IN (F /40) * 34.72KHz IN (F /40) * 34.72KHz IN (F /40) * 20.83KHz IN (F /40) * 20.83KHz IN (F /40 ...

Page 4

... EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center frequency. (Note: The center frequency is the frequency of the external reference input on CLKIN, pin1). For example, P2040A is designed for high-resolution, flat panel applications and is able to support an XGA (1024 x 768) flat panel operating at 65MHz (F ) clock speed ...

Page 5

... LH HL Notice: The information in this document is subject to change without notice. Parameter Min VSS - 0.3 2.0 - 20mA 20mA Parameter LCD Panel EMI Reduction IC P2040A Rating Unit -0.5 to +7.0 V -65 to +125 ° °C -40 to +125 °C 150 ° Typ Max Unit - 0 VDD + 0.3 ...

Page 6

... Inches Millimeters Min Max Min 0.004 0.010 0.10 0.053 0.069 1.35 0.049 0.059 1.25 0.012 0.020 0.31 0.007 0.010 0.18 0.193 BSC 4.90 BSC 0.154 BSC 3.91 BSC 0.050 BSC 1.27 BSC 0.236 BSC 6.00 BSC 0.016 0.050 0.41 0° 8° 0° LCD Panel EMI Reduction IC P2040A C L Max 0.25 1.75 1.50 0.51 0.25 1.27 8° ...

Page 7

... Notice: The information in this document is subject to change without notice θ A1 Dimensions Inches Min Max Min 0.043 0.006 0.05 0.037 0.85 0.012 0.19 0.008 0.09 0.122 2.90 0.177 4.30 0.026 BSC 0.252 BSC 0.028 0.50 0° 8° 0° LCD Panel EMI Reduction IC P2040A Millimeters Max 1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8° ...

Page 8

... October 2005 rev 1.2 Ordering Information Part number Marking P2040A -08-ST P2040A P2040A -08-SR P2040A P2040AF-08-ST P2040AF P2040AF-08-SR P2040AF P2040AG-08-ST P2040AG P2040AG-08-SR P2040AG I2040A-08-ST I2040A I2040A-08-SR I2040A I2040AF-08-ST I2040AF I2040AF-08-SR I2040AF I2040AG-08-ST I2040AG I2040AG-08-SR I2040AG P2040A-08-TT P2040A P2040A-08-TR P2040A P2040AF-08-TT P2040AF P2040AF-08-TR P2040AF P2040AG-08-TT ...

Page 9

... Alliance against all claims arising from such use. Notice: The information in this document is subject to change without notice. Copyright © Alliance Semiconductor All Rights Reserved Preliminary Information Part Number: P2040A Document Version: v1.2 LCD Panel EMI Reduction IC P2040A ...

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