ASM3I2759AF-06OR PULSECORE [PulseCore Semiconductor], ASM3I2759AF-06OR Datasheet

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ASM3I2759AF-06OR

Manufacturer Part Number
ASM3I2759AF-06OR
Description
Low Power Peak EMI Reducing Solution
Manufacturer
PULSECORE [PulseCore Semiconductor]
Datasheet
January 2007
rev 1.7
Features
Product Description
The ASM3P2759A is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2759A reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of
dependent signals. The ASM3P2759A 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
XIN
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
Generates an EMI optimized clock signal at the
output.
Integrated loop filter components.
Operates with a 3.3V / 2.5V Supply.
Operating current less than 4mA.
Low power CMOS design.
Input frequency range: 3MHz to 5MHz for 2.5V
Generates a 1X low EMI spread spectrum clock
of the input frequency.
Frequency deviation: ±1% @ 3MHz
Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin
TSSOP packages.
Oscillator
Crystal
: 3MHz to 6MHz for 3.3V
Notice: The information in this document is subject to change without notice.
Frequency
Low Power Peak EMI Reducing Solution
Feedback
Divider
Divider
PulseCore Semiconductor Corporation
VDD
VSS
www.pulsecoresemi.com
all clock
Modulation
Detector
Phase
PD
The ASM3P2759A uses the most efficient and optimized
modulation profile approved by the FCC and
implemented by using a proprietary all digital method.
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 ASM3P2759A is targeted towards all portable devices
with very low power requirements like MP3 players and
digital still cameras.
Key Specifications
Supply voltages
Cycle-to-Cycle Jitter
Output Duty Cycle
Modulation Rate Equation
Frequency Deviation
The ASM3P2759A modulates the output of a single PLL
Description
Loop
Filter
VCO
PLL
VDD = 3.3V / 2.5V
200pS (Max)
45/55%
F
±1% @ 3MHz
ASM3P2759A
IN
/128
Specification
Divider
Output
ModOUT
is

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ASM3I2759AF-06OR Summary of contents

Page 1

January 2007 rev 1.7 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 / 2.5V Supply. • Operating current less than 4mA. ...

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January 2007 rev 1.7 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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January 2007 rev 1.7 Pin Configuration (8-pin SOIC and TSSOP Packages) Pin Description Pin# Pin Name Type Crystal connection or external reference frequency input. This pin has dual functions XIN/CLKIN I can be connected either to an external ...

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January 2007 rev 1.7 Absolute Maximum Ratings Symbol VDD, V Voltage on any pin with respect to Ground IN T Storage temperature STG T Operating temperature A T Max. Soldering Temperature (10 sec Junction Temperature J Static Discharge ...

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January 2007 rev 1.7 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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January 2007 rev 1.7 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 Peak EMI Reducing Solution Notice: The information ...

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January 2007 rev 1.7 Package Information Symbol θ Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 6-pin TSOT-23 Package Dimensions ...

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January 2007 rev 1 Symbol θ Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 8-Pin SOIC Package ...

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January 2007 rev 1 Symbol Min A A1 0.002 A2 0.033 B 0.008 c 0.004 D 0.114 E 0.169 0.020 θ Low Power Peak EMI Reducing Solution Notice: The information in this document is ...

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... ASM3P2759AF-06OR O4LL ASM3P2759AF-08TT 3P2759AF ASM3P2759AF-08TR 3P2759AF ASM3P2759AF-08ST 3P2759AF ASM3P2759AF-08SR 3P2759AF ASM3P2759AG-06OR O3LL ASM3P2759AG-08TT 3P2759AG ASM3P2759AG-08TR 3P2759AG ASM3P2759AG-08ST 3P2759AG ASM3P2759AG-08SR 3P2759AG ASM3I2759AF-06OR O5LL ASM3I2759AF-08TT 3I2759AF ASM3I2759AF-08TR 3I2759AF ASM3I2759AF-08ST 3I2759AF ASM3I2759AF-08SR 3I2759AF ASM3I2759AG-06OR O6LL ASM3I2759AG-08TT 3I2759AG ASM3I2759AG-08TR 3I2759AG ASM3I2759AG-08ST 3I2759AG ASM3I2759AG-08SR 3I2759AG Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice ...

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January 2007 rev 1.7 Device Ordering Information Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Low Power Peak EMI Reducing Solution Notice: The information ...

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January 2007 rev 1.7 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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