- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381366 > ASM3P2474A (Alliance Semiconductor Corporation) Low Power Peak EMI Reducing Solution PDF資料下載
參數(shù)資料
| 型號： | ASM3P2474A |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | Low Power Peak EMI Reducing Solution |
| 中文描述： | 低功耗降低峰值電磁干擾解決方案 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 171K |
| 代理商： | ASM3P2474A |
October 2005
rev 1.0
ASM3P2474A
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.
Low Power Peak EMI Reducing Solution
Features
Generates an EMI optimized clock signal at the
output.
Integrated loop filter components.
Operates with a 3.3V Supply.
Operating current less than 6mA.
Low power CMOS design.
Input frequency range : 13MHz to 30MHz
Generates a 1X and 2X low EMI spread spectrum
clock of the input frequency.
Output Frequency Selection through FSEL pin
Frequency deviation : -1.5% (Typ) @25MHz
: -1.5% (Typ) @50MHz
Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin
TSSOP packages.
Product Description
The ASM3P2474A is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2474A reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of all clock
dependent signals. The ASM3P2474A allows significant
system cost savings by reducing the number of circuit
board layers, ferrite beads and shielding that are
traditionally required to pass EMI regulations.
The ASM3P2474A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all digital method.
The ASM3P2474A 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’.
Applications
The ASM3P2474A is targeted towards all portable
devices with very low power requirements like MP3
players and digital still cameras.
Key Specifications
Description
Supply voltages
Specification
VDD = 3.3V
±
0.3V
Cycle-to-Cycle Jitter
200pS (Typ)
Output Duty Cycle
45/55% (worst case)
Modulation Rate Equation
F
IN
/640
FSEL=0
-1.5% (Typ) @ 50MHz
Frequency
Deviation
FSEL=1
-1.5% (Typ) @ 25MHz
Block Diagram
ModOUT
VSS
XIN/CLKIN
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
PLL
VDD
FSEL
Crystal
Oscillator
XOUT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ASM3P2474AF-06OR | Circular Connector; No. of Contacts:53; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:23; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:23-53 RoHS Compliant: No |
| ASM3P2474AF-08SR | Low Power Peak EMI Reducing Solution |
| ASM3P2474AG-08SR | Low Power Peak EMI Reducing Solution |
| ASM3P2474AG-08ST | Low Power Peak EMI Reducing Solution |
| ASM3P2474AG-08TR | Low Power Peak EMI Reducing Solution |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM3P2474AF-06OR | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 13-30MHZ 3.3V LP EMI 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| ASM3P2474AF-08SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Power Peak EMI Reducing Solution |
| ASM3P2474AF-08ST | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Power Peak EMI Reducing Solution |
| ASM3P2474AF-08TR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Power Peak EMI Reducing Solution |
| ASM3P2474AF-08TT | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Power Peak EMI Reducing Solution |
發(fā)布緊急采購，3分鐘左右您將得到回復。