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March 2007 rev 1.7 EMI Reduction IC
Features
* * * * * * * * * * * * * FCC approved method of EMI attenuation. Provides up to 15dB EMI reduction. Generates a 1X low EMI spread spectrum clock of the input frequency. Input frequency range: 6MHz to 90MHz. Internal loop filter minimizes external components and board space. Selectable spread options: Down and Center Spread 2 spread frequency deviation selections: * -1.25% or 0.42% Low inherent cycle-to-cycle jitter. Supply Voltage: 3.3 V 0.3V. Low power CMOS design. Supports notebook VGA and other LCD timing controller applications. Products are available for Industrial temperature range. Available in 8-pin SOIC and TSSOP Packages.
ASM3P2183A
The ASM3P2183A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P2183A 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 ASM3P2183A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The ASM3P2183A 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'.
Product Description
The ASM3P2183A is a versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 6MHz to 90MHz. (Refer Input Frequency and Modulation Rate Table). The ASM3P2183A can generate an EMI reduced clock from an OSC or a system generated clock. The ASM3P2183A offers a Down Spread clock with a percentage deviation of -1.25% and a Center Spread clock with a percentage deviation of 0.42%.
Applications
The ASM3P2183A is targeted towards EMI management for memory and LVDS interfaces in mobile graphic chipsets and high-speed digital applications such as PC peripheral devices, consumer electronics, and embedded controller systems.
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200, Campbell, CA 95008 * Tel: 408-879-9077 * Fax: 408-879-9018 www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.
March 2007 rev 1.7
Block Diagram
FS0 FS1 SS% VDD
ASM3P2183A
Modulation XIN /CLKIN Crystal Oscillator XOUT Frequency Divider Feedback Divider
PLL
Phase Detector
Loop Filter
VCO
Output Divider ModOUT
Pin Configuration
VSS
XIN / CLKIN 1 XOUT 2
8
FS1
7 FS0
ASM3P2183A
VSS SS%
3 4 6 5
VDD ModOUT
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
XIN /CLKIN XOUT VSS SS% ModOUT VDD FS0 FS1
Type
I I P I O P I I
Description
Crystal connection or external frequency input. This pin has dual functions. It can be connected to either an external crystal or an external reference clock. Crystal connection. Input connection for an external crystal. If using an external reference, this pin must be left unconnected. Ground to entire chip. Spread range select. Digital logic input used to select frequency deviation (Refer Spread Deviation Selection Table). This pin has an internal pull-up resistor. Spread spectrum low EMI output. Power supply for the entire chip. Frequency range select. Digital logic input used to select frequency range (Refer Input Frequency and Modulation Rate Table). This pin has an internal pull-up resistor. Frequency range select. Digital logic input used to select frequency range (Refer Input Frequency and Modulation Rate Table). This pin has an internal pull-up resistor.
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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March 2007 rev 1.7
Input Frequency and Modulation Rate Table FS1 (pin 8)
0 0 1 1
ASM3P2183A
FS0 (pin 7)
0 1 0 1
Frequency Range
6MHz to 13MHz 12MHz to 25MHz 25MHz to 50MHz 50MHz to 90MHz
Spread Deviation Selection Table SS% (pin 4)
0 1
Spread Deviation (%)
- 1.25 0.42
Absolute Maximum Ratings Symbol
VDD, VIN TSTG Ts TJ TDV Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B)
Parameter
Voltage on any pin with respect to Ground
Rating
-0.5 to +4.6 -65 to +125 260 150 2
Unit
V C C C KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability.
Recommended Operating Conditions Symbol
TA VDD
Parameter
Operating Temperature Core Voltage
Min
0 +3.0
Typ
+3.3
Max
+70 +3.6
Units
C V
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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March 2007 rev 1.7
DC Electrical Characteristics Symbol
VIL VIH IIL IIH IXOL IXOH VOL VOH ICC IDD VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current XOUT Output low current (@ 0.4V, VDD = 3.3V) XOUT Output high current (@ 2.5V, VDD = 3.3V) Output low voltage (VDD = 3.3V, IOL = 20mA) Output high voltage (VDD = 3.3V, IOH = 20mA) Dynamic supply current Normal mode (3.3V,90MHz and 10pF loading) Static supply current * Operating voltage Power up time (first locked clock cycle after power up) Clock out impedance
ASM3P2183A
Parameter
Min
VSS - 0.3 2.0 2.5 3.0 -
Typ
3 3 28 7.0 3.3 0.18 50
Max
0.8 VDD + 0.3 -35 35 0.4 3.6 -
Unit
V V A A mA mA V V mA mA V mS
* XIN /CLKIN pin is pulled low
AC Electrical Characteristics Symbol
fIN ModOUT tLH* tHL* tJC TD Input frequency Output frequency Output rise time (measured at 0.8V to 2.0V) Output fall time (measured at 2.0V to 0.8V) Jitter (cycle to cycle) Output duty cycle
Parameter
Min
6 6 0.3 0.5 45
Typ
0.9 1.0 50
Max
90 90 1.1 1.2 200 55
Unit
MHz MHz nS nS pS %
* tLH and tHL are measured with a capacitive load of 15pF at 27MHz
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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March 2007 rev 1.7
Package Information
ASM3P2183A
8-lead (150-mil) SOIC Package
E
H
D
A2
A
e B A 1
C L
D
Dimensions
Symbol Min
A1 A A2 B C D E e H L
Inches Max
0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007
Millimeters Min Max
0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0 1.27 8 0.25 1.75 1.50 0.51 0.25
0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0 0.050 8
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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March 2007 rev 1.7
ASM3P2183A
8-lead Thin Shrunk Small Outline Package (4.40-MM Body)
H
E D A2 A e B A1 L C
Dimensions Symbol Min
A A1 A2 B c D E e H L 0.020 0 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8 0.50 0
Inches Max
0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30
Millimeters Min Max
1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8
EMI Reduction IC
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March 2007 rev 1.7
Ordering Information Part Number
ASM3P2183A-08ST ASM3P2183A-08SR ASM3P2183A-08TT ASM3P2183A-08TR ASM3P2183AF-08ST ASM3P2183AF-08SR ASM3P2183AF-08TT ASM3P2183AF-08TR ASM3P2183AG-08ST ASM3P2183AG-08SR ASM3P2183AG-08TT ASM3P2183AG-08TR
ASM3P2183A
Marking
3P2183A 3P2183A 3P2183A 3P2183A 3P2183AF 3P2183AF 3P2183AF 3P2183AF 3P2183AG 3P2183AG 3P2183AG 3P2183AG
Package Type
8-Pin SOIC, TUBE 8-Pin SOIC, TAPE & REEL 8-Pin TSSOP, TUBE 8-Pin TSSOP, TAPE & REEL 8-Pin SOIC, TUBE, Pb Free 8-Pin SOIC, TAPE & REEL, Pb Free 8-Pin TSSOP, TUBE, Pb Free 8-Pin TSSOP, TAPE & REEL, Pb Free 8-Pin SOIC, TUBE, Green 8-Pin SOIC, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green
Temperature
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
Device Ordering Information
ASM3P2183AF-08TR
R = Tape & Reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS PART NUMBER X= Automotive I= Industrial P or n/c = Commercial (-40C to +125C) (-40C to +85C) (0C to +70C) 1 = Reserved 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer 6 = Power Management 7 = Power Management 8 = Power Management 9 = Hi Performance 0 = Reserved U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
PulseCore Semiconductor Mixed Signal Product
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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March 2007 rev 1.7
ASM3P2183A
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com
Copyright (c) PulseCore Semiconductor All Rights Reserved Part Number: ASM3P2183A Document Version: v1.7
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
(c) Copyright 2007 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore's best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore's Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore's Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use.
EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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