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参数资料
| 型号： | ASM3P2108AF-08-TR |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | XO, clock |
| 英文描述： | 45 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | ROHS COMPLIANT, TSSOP-8 |
| 文件页数： | 1/7页 |
| 文件大小： | 344K |
| 代理商： | ASM3P2108AF-08-TR |
ASM3P2108A
Peak EMI Reducing Solution
2010 SCILLC. All rights reserved.
Publication Order Number:
JANUARY 2010 – Rev. 1
ASM3P2108/D
Features
FCC approved method of EMI attenuation.
Generates a 1X low EMI spread spectrum clock of
the input frequency.
Input frequency range: 25MHz to 45MHz.
Internal loop filter minimizes external components
and board space.
Frequency deviation: - 1.3%( Typ) @ 32MHz.
Low cycle-to-cycle jitter.
5.0V ± 5% operating voltage range.
TTL or CMOS compatible outputs.
Available in 8-pin SOIC and TSSOP Packages.
Product Description
The ASM3P2108A is a versatile spread spectrum
frequency modulator designed specifically for input clock
frequencies from 25MHz to 45MHz. The ASM3P2108A
can generate an EMI reduced clock from crystal, ceramic
resonator, or system clock.
The ASM3P2108A reduces electromagnetic interference
(EMI) at the clock source, allowing system wide reduction
of EMI of down stream clock and data dependent signals.
The ASM3P2108A 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 ASM3P2108A uses the most efficient and optimized
modulation
profile
approved
by
the
FCC
and
is
implemented in a proprietary all digital method.
The ASM3P2108A 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 inc
reasing a signals bandwidth is called spread
spectrum clock generation.
Applications
The ASM3P2108A is targeted towards EMI management
for high speed digital applications such as PC peripheral
devices, consumer electronics and embedded controller
systems.
Block Diagram
GND
XIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
CLOCKOUT
PLL
VDD
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ASM3P2108AF-08-TT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2108AG-08-SR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2108AG-08-ST | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2108AG-08-TR | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
| ASM3P2108AG-08-TT | 制造商:ALSC 制造商全称:Alliance Semiconductor Corporation 功能描述:Peak EMI Reducing Solution |
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