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參數(shù)資料
| 型號： | CY25100ZXIF |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Field- and Factory-Programmable Spread Spectrum Clock Generator for EMI Reduction |
| 中文描述： | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 4.40 MM, LEAD FREE, TSSOP-8 |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 279K |
| 代理商： | CY25100ZXIF |
CY25100
Document #: 38-07499 Rev. *D
Page 2 of 11
General Description
The CY25100 is a Spread Spectrum Clock Generator (SSCG)
IC used for the purpose of reducing EMI found in today’s
high-speed digital electronic systems.
The device uses a Cypress proprietary 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 (EMC) requirements and improve
time-to-market without degrading system performance.
The CY25100 uses a factory/field-programmable configu-
ration memory array to synthesize output frequency, spread%,
crystal load capacitor, reference clock output on/off, spread
spectrum on/off function and PD#/OE options.
The spread% is 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 CY25100 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 CY25100 has two clock outputs, REFCLK and SSCLK.
The non-spread spectrum REFCLK output has the same
frequency as the input of the CY25100. The frequency
modulated SSCLK output can be programmed from 3–200
MHz.
The CY25100 products are available in an 8-pin SOIC and
TSSOP packages with commercial and industrial operating
temperature ranges.
Pin Description
Pin
Name
Description
1
2
3
4
VDD
XOUT
XIN/CLKIN
PD#/OE
3.3V power supply
.
Crystal output
. Leave this pin floating if external clock is used.
Crystal input or reference clock input
.
Power-down pin
:
Active LOW
. If PD# = 0, the PLL and Xtal are powered down,
and outputs are weakly pulled low.
Output Enable pin
:
Active HIGH
. If OE = 1, SSCLK and REFCLK are enabled.
User has the option of choosing either PD# or OE function.
Power supply ground
.
Buffered reference output
.
Spread spectrum clock output
.
Spread spectrum control
. 0 = Spread on. 1 = Spread off.
5
6
7
8
VSS
REFCLK
SSCLK
SSON#
Table 1.
Pin
Function
Pin Name
Input
Frequency
XIN and
XOUT
3 and 2
MHz
ENTER DATA ENTER DATA
Total Xtal
Load
Capacitance
XIN and XOUT
Output
Frequency
SSCLK
Spread Percent
(0.5% – 5%,
0.25% Intervals)
SSCLK
Reference
Output
REFOUT
Power-down or
Output Enable
PD#/OE
Frequency
Modulation
SSCLK
Pin#
Unit
Program
Value
3 and 2
pF
7
7
%
6
4
7
MHz
ENTER
DATA
On or Off
ENTER
DATA
Select PD# or OE
ENTER DATA
kHz
31.5
ENTER DATA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY25100ZXIFT | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 Spectrum Clk Genratr IND RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY25100ZXI-XXXW | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Field and Factory-Programmable Spread Spectrum Clock Generator for EMI Reduction |
| CY25100ZXI-XXXWT | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Field- and Factory-Programmable Spread Spectrum Clock Generator for EMI Reduction |
| CY25103KSXC-2 | 制造商:Cypress Semiconductor 功能描述: |
| CY25103SXC-2 | 功能描述:鎖相環(huán) - PLL CY25103SXC-2 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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