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ASM3P2590AG-06-OR Datasheet(PDF) 1 Page - PulseCore Semiconductor

Part # ASM3P2590AG-06-OR
Description  Low Power Peak EMI Reducing Solution
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Manufacturer  PULSECORE [PulseCore Semiconductor]
Direct Link  http://www.onsemi.com/
Logo PULSECORE - PulseCore Semiconductor

ASM3P2590AG-06-OR Datasheet(HTML) 1 Page - PulseCore Semiconductor

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September 2006
ASM3P2590A
rev 0.4
Notice: The information in this document is subject to change without notice.
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008
• Tel: 408-879-9077 • Fax: 408-879-9018
www.pulsecoresemi.com
Low Power Peak EMI Reducing Solution
Features
• Generates a 1X low EMI optimized clock signal at the
output.
• Integrated loop filter components.
• Operates with a 3.3 / 2.5V Supply.
• Operating current less than 5mA.
• Low power CMOS design.
• Input frequency range
60MHz to 120MHz for 2.5V
60MHz to 120MHz for 3.3V
• Frequency deviation: ±0.75% (Typ) @85MHz Output
frequency.
• Available in 6-pin TSOT-23 Package.
Product Description
The ASM3P2590A is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2590A reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of
all clock
dependent signals. The ASM3P2590A allows significant
system cost savings by reducing the number of circuit
board layers ferrite beads, shielding that are traditionally
required to pass EMI regulations.
The ASM3P2590A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all digital method.
The ASM3P2590A 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 ASM3P2590A is targeted towards all portable
devices with very low power requirements like MP3
players,MFP, LCD Panel Module and digital still cameras.
Key Specifications
Description
Specification
Supply voltages
VDD = 3.3V / 2.5V
Cycle-to-Cycle Jitter
360pS (Typ)
Output Duty Cycle
45/55%
Modulation Rate Equation
FIN/2560
Frequency Deviation
±0.75% (Typ) @85MHz
Output
Block Diagram
ModOUT
VSS
CLKIN
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
PLL
VDD
SSON


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