ASM3I2274AG-06-OR PULSECORE [PulseCore Semiconductor], ASM3I2274AG-06-OR Datasheet

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ASM3I2274AG-06-OR

Manufacturer Part Number
ASM3I2274AG-06-OR
Description
Low Power 4X Multiplier EMI Reduction IC
Manufacturer
PULSECORE [PulseCore Semiconductor]
Datasheet
XIN/CLKIN
November 2006
rev 1.1
Features
Product Description
The ASM3P2274 is a versatile Spread Spectrum
Frequency Modulator designed specifically for a wide
range of clock frequencies. It provides a 4x Spread
Spectrum Modulated output from an input clock source.
The ASM3P2274A reduces electromagnetic interference
(EMI) at the clock source, allowing system wide reduction
of EMI of all clock dependent signals. The ASM3P2274A
allows significant system cost savings by reducing the
number of circuit board layers ferrite beads, shielding
that are traditionally required to pass EMI regulations.
Block Diagram
XOUT
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
Generates a 4X EMI optimized clock signal at the
output.
Integrated loop filter components.
Operates with a 3.3 / 2.5V Supply.
Low power CMOS design.
Input frequency range: 12MHz to 30MHz for 2.5V.
Frequency deviation: -1.5% (Typ) @66MHz
Output Frequency.
Available in 6-pin TSOT-23 Package.
Oscillator
Crystal
: 12MHz to 30MHz for 3.3V.
Notice: The information in this document is subject to change without notice.
Low Power 4X Multiplier EMI Reduction IC
Frequency
Feedback
PulseCore Semiconductor Corporation
Divider
Divider
VDD
VSS
www.pulsecoresemi.com
Modulation
Detector
Phase
PD
The ASM3P2274A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all digital method.
The ASM3P2274A 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 ASM3P2274A is targeted towards all portable
devices with very low power requirements like MP3
players,MFP, LCD Panel Module and digital still cameras.
Key Specifications
Supply voltages
Cycle-to-Cycle Jitter
Output Duty Cycle
Modulation Rate Equation
Frequency Deviation
Description
Loop
Filter
VCO
Output
PLL
VDD = 3.3V / 2.5V
360pS (Typ)
45/55%
F
-1.5% (Typ) @ 66MHz
IN
ASM3P2274A
/640
Specification
Divider
Output
ModOUT

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ASM3I2274AG-06-OR Summary of contents

Page 1

November 2006 rev 1.1 Low Power 4X Multiplier EMI Reduction IC Features • Generates a 4X EMI optimized clock signal at the output. • Integrated loop filter components. • Operates with a 3.3 / 2.5V Supply. • Low power CMOS ...

Page 2

November 2006 rev 1.1 Pin Configuration (6-pin TSOT- 23 Package) Pin Description Pin# Pin Name Type Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. 2 XOUT O Crystal connection. If ...

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November 2006 rev 1.1 Absolute Maximum Ratings Symbol Voltage on any pin with respect to Ground VDD Storage temperature T STG Operating temperature T A Max. Soldering Temperature (10 sec Junction Temperature T J Static Discharge ...

Page 4

November 2006 rev 1.1 DC Electrical Characteristics for 3.3V Supply (Test condition: All parameters are measured at room temperature (+ 25°C) unless otherwise stated) Symbol Parameter V Input low voltage IL V Input high voltage IH I Input low current ...

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November 2006 rev 1.1 Typical Crystal Oscillator Circuit Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance ESR Low Power 4X Multiplier EMI Reduction IC Notice: The ...

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November 2006 rev 1.1 Package Information Symbol θ Low Power 4X Multiplier EMI Reduction IC Notice: The information in this document is subject to change without notice. 6-pin TSOT-23 Package ...

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... November 2006 rev 1.1 Ordering Information Part Number Marking ASM3P2274AG-06-OR ASM3I2274AG-06-OR Device Ordering Information Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Low Power 4X Multiplier EMI Reduction IC Notice: The information in this document is subject to change without notice. ...

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November 2006 rev 1.1 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © Copyright ...

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