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參數資料
| 型號： | P1707A |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | MS3470W18-32P |
| 中文描述： | 筆記本液晶面板的EMI降低集成電路 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 209K |
| 代理商： | P1707A |
October 2003
rev 1.0
P1707A
Alliance Semiconductor
2575, Augustine Drive
Santa Clara, CA
Tel: 408.855.4900
Fax: 408.855.4999
www.alsc.com
Notice: The information in this document is subject to change without notice.
Notebook LCD Panel EMI Reduction IC
Features
FCC approved method of EMI attenuation.
Generates a low EMI spread spectrum clock of the
input frequency.
Optimized for frequency range from 60 to 175MHz.
Internal loop filter minimizes external components
and board space.
Four selectable spread ranges.
Low inherent cycle-to-cycle jitter.
3.3V operating voltage range.
TTL or CMOS compatible inputs and outputs.
Ultra-low power CMOS design.
14.85 mA @3.3V, 140MHz
16.69mA @3.3V, 162MHz
17.78 mA @3.3V, 175MHz
Supports notebook VGA and other LCD timing
controller applications.
Pinout compatible to ICS MK1707 and Cypress
CY25561/CY25560.
SSON/SBM pin for Spread Spectrum On/Off
and Standby Mode controls.
Available in 8-pin SOIC and TSSOP.
Product Description
The P1707A is a versatile spread spectrum frequency
modulator designed specifically for input clock frequencies.
The P1707A reduces electromagnetic interference (EMI) at
the clock source, allowing system wide reduction of EMI of
Block Diagram
down stream clock and data dependent signals. The
P1707A 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.
The P1707A 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. 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’.
The P1707A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented in a proprietary all digital method.
Applications
The P1707A is targeted towards notebook LCD displays,
and other displays using an LVDS interface, PC peripheral
devices, and embedded systems.
VSS
CLKIN
Divider
Divider
Frequency
Feedback
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
ModOUT
PLL
VDD
SSON
SR0 SR1
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相關代理商/技術參數 |
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| P1707A-08SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Notebook LCD Panel EMI Reduction IC |
| P1707A-08ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Notebook LCD Panel EMI Reduction IC |
| P1707A-08TR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Notebook LCD Panel EMI Reduction IC |
| P1707A-08TT | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Notebook LCD Panel EMI Reduction IC |
| P1707AF-08SR | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:Notebook LCD Panel EMI Reduction IC |
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