ASM3P2598A PulseCore Semiconductor, ASM3P2598A Datasheet

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ASM3P2598A

Manufacturer Part Number
ASM3P2598A
Description
Low Power Peak EMI Reducing Solution
Manufacturer
PulseCore Semiconductor
Datasheet
October 2006
rev 0.3
Features
• Generates a 1X low EMI optimized clock signal at the
• Integrated loop filter components.
• Operates with a 3.3 / 2.5V Supply.
• Operating current less than 5mA.
• Low power CMOS design.
• Input frequency range
• Frequency deviation: ±1.5(Typ) @85MHz Output
• Available in 6-pin TSOT-23 Package.
Product Description
The ASM3P2598A is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2598A reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of
dependent signals. The ASM3P2598A 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
CLKIN
60MHz to 120MHz for 3.3V
output.
60MHz to 120MHz for 2.5V
frequency.
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
Notice: The information in this document is subject to change without notice.
Low Power Peak EMI Reducing Solution
Frequency
PulseCore Semiconductor Corporation
Feedback
Divider
Divider
VDD
VSS
www.pulsecoresemi.com
all clock
Modulation
Detector
SSON
Phase
The ASM3P2598A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented by using a proprietary all digital method.
The ASM3P2598A 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 ASM3P2598A 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
PLL
VDD = 3.3V / 2.5V
360pS (Typ)
45/55%
F
±1.5% (Typ) @85MHz
Output
IN
ASM3P2598A
/2560
Specification
www.DataSheet4U.com
Output
Divider
ModOUT

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ASM3P2598A Summary of contents

Page 1

... The ASM3P2598A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2598A 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 ...

Page 2

... Frequency Deviation Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. SSON 1 6 VSS ASM3P2598A ModOUT 3 4 CLKIN VDD Description Specification 60MHz < CLKIN < 120MHz 60MHz < CLKIN < 120MHz F /2560 IN ±1.5% (Typ) @ 85MHz Output www.DataSheet4U.com ASM3P2598A ...

Page 3

... Parameter Min VSS - 0.3 2.0 – – mA) – mA) 1.8 OH – – 2.375 – – Parameter Input Frequency = 60MHz Input Frequency = 120MHz www.DataSheet4U.com ASM3P2598A Rating Unit -0.5 to +4.6 V -65 to +125 °C -40 to +85 °C 260 °C 150 ° Typ Max Unit – 0.8 V – ...

Page 4

... Notice: The information in this document is subject to change without notice. Min VSS - 0.3 2.0 – – mA) – mA) 2.5 OH – – 3.0 – – Parameter Input Frequency = 60MHz Input Frequency = 120MHz www.DataSheet4U.com ASM3P2598A Typ Max Unit – 0.8 V – VDD + 0.3 V – -35 µA – 35 µA – 0.4 V – – ...

Page 5

... Notice: The information in this document is subject to change without notice. 6-pin TSOT-23 Package Dimensions Inches Millimeters Min Max Min 0.04 0.00 0.004 0.00 0.033 0.036 0.84 0.012 0.02 0.30 0.005 BSC 0.127 BSC 0.114 BSC 2.90 BSC 0.06 BSC 1.60 BSC 0.0374 BSC 0.950 BSC 0.11 BSC 2.80 BSC 0.0118 0.02 0.30 0° 4° 0° www.DataSheet4U.com ASM3P2598A Max 1.00 0.10 0.90 0.50 0.50 4° ...

Page 6

... G = GREEN PACKAGE, LEAD FREE, and RoHS PART NUMBER X= Automotive (-40C to +125C Reserved 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer PulseCore Semiconductor Mixed Signal Product www.DataSheet4U.com ASM3P2598A Temperature Commercial Commercial Industrial Industrial U = MSOP J=TSOT26 E = TQFP L = LQFP U = MSOP ...

Page 7

... PulseCore against all claims arising from such use. Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. www.DataSheet4U.com ASM3P2598A Copyright © PulseCore Semiconductor All Rights Reserved Preliminary Information Part Number: ASM3P2598A Document Version: 0 ...

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