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參數(shù)資料
| 型號(hào)： | CY25200 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Programmable Spread Spectrum Clock Generator for EMI Reduction |
| 中文描述： | 可編程擴(kuò)頻時(shí)鐘發(fā)生器減少電磁干擾 |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 280K |
| 代理商： | CY25200 |
CY25200
Document #: 38-07633 Rev. *A
Page 2 of 11
General Description
The CY25200 is a Spread Spectrum Clock Generator (SSCG)
IC used for the purpose of reducing Electro Magnetic Inter-
ference (EMI) found in today’s high-speed digital electronic
systems.
The device uses a Cypress proprietary Phase-Locked Loop
(PLL) and Spread Spectrum Clock (SSC) technology to
synthesize and modulate the frequency of the input clock. By
frequency modulating the clock, the measured EMI at the
fundamental and harmonic frequencies are greatly reduced.
This reduction in radiated energy can significantly reduce the
cost of complying with regulatory agency requirements (EMC)
and improve time to market without degrading system perfor-
mance.
The CY25200 uses a factory-programmable configuration
memory array to synthesize output frequency, spread %,
crystal load capacitor, clock control pins, PD# and OE options.
The spread % is factory programmed to either center spread
or down spread with various spread percentages. The range
for center spread is from ±0.25% to ±2.50%. The range for
down spread is from –0.5% to –5.0%. Contact the factory for
smaller or larger spread % amounts if required.
The input to the CY25200 can be either a crystal or a clock
signal. The input frequency range for crystals is 8–30 MHz,
and for clock signals is 8–166 MHz.
The CY25200 has six clock outputs, SSCLK1 to SSCLK6. The
frequency modulated SSCLK outputs can be programmed
from 3–200 MHz.
The CY25200 products are available in a 16-pin TSSOP
package with a commercial operating temperature range of 0
to 70
°
C.
CY25200 Pin Summary
Name
XIN
XOUT
VDD
AVDD
VSS
AVSS
VDDL
VSSL
SSCLK1
SSCLK2
SSCLK3
SSCLK4
SSCLK5/REFOUT/CP2
Pin Number
1
16
2
3
13
5
11
6
7
8
9
12
14
Description
Crystal Input or Reference Clock Input
.
Crystal Output.
Leave this pin floating if external clock is used.
3.3V Power supply for digital logic and SSCLK5/6 clock drives.
3.3V analog–PLL power supply
Ground
Analog ground
2.5V or 3.3V power supply for SSCLK1/2/3/4 clock drives
VDDL power supply ground
Programmable Spread Spectrum Clock Output at VDDL Level (2.5V or 3.3V)
Programmable Spread Spectrum Clock Output at VDDL Level (2.5V or 3.3V)
Programmable Spread Spectrum Clock Output at VDDL Level (2.5V or 3.3V)
Programmable Spread Spectrum Clock Output at VDDL Level (2.5V or 3.3V)
Programmable Spread Spectrum Clock or Buffered Reference Output at VDD
Level (3.3V) or Control pin, CP2
Programmable Spread Spectrum Clock or Buffered Reference Output at VDD
Level (3.3V) or Control pin, CP3
Control Pin 0
Control Pin 1
SSCLK6/REFOUT/CP3
15
CP0
[1]
CP1
[1]
4
10
Note:
1. Pins can be programmed to be any of the following control signals: OE: Output Enable, OE = 1 all the SSCLK outputs are enabled, PD#: Powerdown, PD#
= 0, all the SSCLK outputs are three-stated and the part enters a low-power state, SSON: Spread Spectrum Control (SSON = 0, No Spread and SSON = 1,
Spread Signal), CLKSEL: SSCLK Output Frequency Select. Please see page 3 for control pins programming option.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY25200ZXC | Paired Cable; Number of Conductors:24; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Number of Pairs:12; Conductor Material:Copper; Features:Traditional Analog Audio Applications RoHS Compliant: Yes |
| CY25566 | Spread Spectrum Clock Generator |
| CY25566SCT | Spread Spectrum Clock Generator |
| CY25566SC | Spread Spectrum Clock Generator |
| CY25702XZZZ | Programmable High-Frequency Crystal Oscillator (XO) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY25200_07 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Programmable Spread Spectrum Clock Generator for EMI Reduction |
| CY25200_09 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Programmable Spread Spectrum Clock Generator for EMI Reduction |
| CY25200_12 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Programmable Spread Spectrum Clock Generator for EMI Reduction |
| CY25200FZXC | 功能描述:鎖相環(huán) - PLL Spectrum Clk Genratr COM RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| CY25200FZXCT | 功能描述:鎖相環(huán) - PLL Spectrum Clk Genratr COM RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
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