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參數(shù)資料
| 型號： | FS787BZ |
| 英文描述： | MISCELLANEOUS CLOCK GENERATOR|SOP|8PIN|PLASTIC |
| 中文描述： | 雜項時鐘發(fā)生器|?？苵 8引腳|塑料 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 94K |
| 代理商： | FS787BZ |
Low EMI Spread Spectrum Clock
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress
Document#: 38-07031 Rev. **
05/04/2001
Page 1 of 13
APPROVED
PRODUCT
FS786/787
Features
Spread Spectrum Clock Generator (SSCG)
with 1x Spread and 1X non-Spread Output.
6 to 82 MHz operating frequency range.
Modulates external clocks including crystals,
crystal oscillators and ceramic resonators.
Programmable modulation with simple
R-C external loop filter (LF)
Provides Two Output Clocks, One Modulated
and One Non-Modulated clock.
Center Spread Modulation.
3 - 5 Volt power supply.
TTL/CMOS compatible outputs.
Low short term jitter.
Low Power Dissipation;
3.3 VDC = 37 mW – typical
5.0 VDC = 115 mW - typical
Product Description
Available in 8 pin SOIC package.
Applications
Benefits
Desktop/Notebook Computers
Printers, Copiers and MFP
Scanners and Fax
LCD Displays and Monitors
CD-ROM, VCD and DVD
Automotive and Embedded Systems
Networking, LAN/WAN
Digital Cameras and Camcorders
Modems
Programmable EMI Reduction
Fast Time to Market
Lower cost of compliance
No degradation in Rise/Fall times
Lower component and PCB layer count
The CYPRESS FS786/787
are Spread Spectrum
Clock Generator ICs (SSCG) designed for the
purpose of reducing Electro Magnetic Interference
(EMI) found in today’s high-speed digital systems.
The FS786/787
SSCG
clocks use an Cypress
proprietary technology to modulate the input clock
frequency, FSOUT
by modulating the frequency of
the digital clock. By modulating the reference clock
the measured EMI at the fundamental and harmonic
frequencies of FSOUT is greatly reduced. This
reduction in radiated energy can significantly reduce
the cost of complying with regulatory requirements
without degrading digital waveforms.
The CYPRESS FS786/787
clocks are very simple
and versatile devices to use. Range selection is
performed via one pin, D0. The
FS786/787
are
designed to operate over a very wide range of input
frequencies and provide one modulated and one
non-modulated output.
The FS786/787 devices
have a simple frequency
selection table that allows operation from 6 MHz to
82 MHz in two separate ranges and two separate
parts. The bandwidth of the frequency spread at
FSOUT is determined by the values of the loop filter
components. The modulation rate is determined
internally by the input frequency and the selected
input frequency range.
The Bandwidth
of these products can be
programmed from as little as 0.6% up to as much as
4.0% by selecting the proper loop filter value. Refer
to the Loop Filter Selection chart on page 6 for
recommended values. Due to a wide range of
application requirements, an external loop filter (LF)
is used on the FS786/787 products. The user can
select the exact amount of frequency modulation
suitable for the application. Using a fixed internal
loop filter would severely limit the use of a wide
range of modulation bandwidths (Spread %) to a few
discrete values.
Refer to FS791/2/4 products for applications
requiring 80 to 140 MHz frequency range.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FS78-8-5K2 | 功能描述:端子 Insulated Ferrules on Reels, single wire RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| FS78-8-DSL2 | 功能描述:端子 16 AWG RED SOLD PER 50 PC STRIP RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| FS791 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Low EMI Spectrum Spread Clock |
| FS791/92/94 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Clocks and Buffers |
| FS792 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Low EMI Spectrum Spread Clock |
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