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April 2008 rev 1.6 Low Power EMI Reduction IC
Features
* * * FCC approved method of EMI attenuation Provides up to 15dB EMI reduction Generates a 1x, 2x and 4x low EMI spread spectrum clock of the input frequency * 1x: ASM3P2811A/B * 2x: ASM3P2812A/B * 4x: ASM3P2814A/B * * * * * * * * * * Optimized for input frequency range from 10MHz to 40 MHz Internal loop filter minimizes external components and board space Selectable spread options: * Down Spread and Center Spread 8 frequency deviation selections: * 0.625% to -3.5% Low inherent Cycle-to-Cycle Jitter 3.3V Operating Voltage CMOS/TTL compatible inputs and outputs. Pin-out compatible with Cypress CY25811, CY25812 and CY25814 Commercial and Industrial temperature range Available in 8-pin SOIC and TSSOP Packages
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
and Center Spread, and percentage deviation range from 0.625% to -3.5%. The ASM3P28XX reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P28XX 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 ASM3P28XX 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'. The ASM3P28XX uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method.
Product Description
The ASM3P28XX devices are versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 10MHz to 40MHz. Refer Input / Output Frequency Range Selection Table. The ASM3P28XX can generate an EMI reduced clock from crystal, ceramic resonator, or system clock. The ASM3P28XX-A and the ASM3P28XX-B offer various combinations of spread options and percentage deviations. Refer Frequency Deviation and Spread Selection Table. These combinations include Down
Applications
The ASM3P28XX 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.
April 2008 rev 1.6
Block Diagram
D_C SRS FRS VDD
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
Modulation XIN /CLKIN Crystal Oscillator XOUT Frequency Divider Feedback Divide
PLL
Phase Detector
Loop Filter
VCO
Output Divider ModOUT
VSS
Pin Configuration
XIN / CLKIN 1 VSS 2 D_C 3 SRS 4 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
8
XOUT VDD FRS ModOUT
7 6 5
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
XIN / CLKIN VSS D_C SRS ModOUT FRS VDD XOUT
Type
I P I I O I P O
Description
Crystal connection or external Clock input. Ground to entire chip. Digital logic input used to select Down (LOW) or Center (HIGH) spread options. (Refer Frequency Deviation and Spread Selection Table). This pin has an internal pull-up resistor. Spread range select. Digital logic input used to select frequency deviation (Refer Frequency Deviation and Spread Selection Table). This pin has an internal pull-up resistor. Spread spectrum clock output Frequency range select. Digital logic input used to select Input frequency range (Refer Input/Output Frequency Range Selection Table). This pin has an internal pull-up resistor. Power supply for the entire chip. Crystal connection. If using an external reference, this pin must be left unconnected.
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Input/Output Frequency Range Selection Table Part Number FRS (pin 6) ASM3P2811 (1x)
Input (MHz) 0 1 10-20 20-40 Output (MHz) 10-20 20-40
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
ASM3P2812 (2x)
Input (MHz) 10-20 20-40 Output (MHz) 20-40 40-80
ASM3P2814 (4x)
Input (MHz) 10-20 20-40 Output (MHz) 40-80 80-160
Modulation Rate
Input Frequency / 448 Input Frequency / 896
Output Frequency Deviation and Spread Selection Table Frequency Deviation* (%) FS=0 10/20/40 (MHz)
0 ASM3P28XXA 0 1 1 0 ASM3P28XXB 0 1 1 0 1 0 1 0 1 0 1 -3 -3.7 1.5 1.8 -1.7 -2.0 0.75 1.0
Part Number
D_C (pin 3)
SRS (pin 4)
FS=1 20/40/80 (MHz)
-2.7 -3.8 1.5 1.9 -1.5 -2.0 0.8 1.0
20/40/80 (MHz)
-2.5 -3.4 1.2 1.6 -1.0 -1.5 0.6 0.75
40/80/160 (MHz)
-2.6 -3.6 1.3 1.8 -1.4 -1.9 0.7 0.9
Note: Frequency Deviation given in the table is for the Output Frequency Range covering ASM3P2811x / 12x / 14x
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 STD 22- 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.
Low Power EMI Reduction IC
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April 2008 rev 1.6
Operating Conditions Symbol
VDD TA CL CIN Operating temperature Load Capacitance Input Capacitance
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
Parameter
Voltage on any pin with respect to GND
Min
3.0 -40
Max
3.6 +85 10 7
Unit
V C pF pF
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 (Inputs D_C, SRS and FRS are pulled high internally) Input high current XOUT Output low current (VXOL@ 0.4V, VDD = 3.3V) XOUT Output high current (VXOH@ 2.5V, VDD = 3.3V) Output low voltage (VDD = 3.3V, IOL = 5mA) Output high voltage (VDD = 3.3V, IOH = -5mA) Dynamic supply current (Unloaded Output) Static supply current , Standby mode (CLKIN pulled to GND) Operating voltage Power up time (first locked clock cycle after power up) Clock out impedance 76 3.0 3.3 2.5 8 18 4.5 3.6 500
Parameter
Min
VSS - 0.3 2
Typ
Max
0.8 VDD + 0.3 -50 50 3 3 0.4
Unit
V V A A mA mA V V mA mA V S
AC Electrical Characteristics Symbol
fIN
Parameter
Input frequency for ASM3P2811/12/13/14 A/B Output frequency for ASM3P2811A/B
Min
10 10 20 40 0.5 0.8
Typ
Max
40 40 80 160
Unit
MHz MHz MHz MHz nS nS pS
fOUT
Output frequency for ASM3P2812A/B Output frequency for ASM3P2814A/B
tLH* tHL* tJC tD
Output rise time (measured at 0.8V to 2.0V) Output fall time (measured at 2.0V to 0.8V) Cycle to Cycle Jitter (Unloaded Output) Output duty cycle
0.9 1.0 250
1.2 1.3
45
50
55
%
* tLH and tHL are measured into a capacitive load of 10pF
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Package Information 8-Pin SOIC Package
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
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
Note: Controlling dimensions are millimeters. SOIC: 0.074 grams unit weight.
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
8-Pin TSSOP Package
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
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
Note: Controlling dimensions are millimeters. TSSOP: 0.0325 grams unit weight.
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Ordering Codes Part Number
ASM3P2811AF-08SR ASM3P2811AF-08ST ASM3P2811AF-08TR ASM3P2811AF-08TT ASM3P2811BF-08SR ASM3P2811BF-08ST ASM3P2811BF-08TR ASM3P2811BF-08TT ASM3P2812AF-08SR ASM3P2812AF-08ST ASM3P2812AF-08TR ASM3P2812AF-08TT ASM3P2812BF-08SR ASM3P2812BF-08ST ASM3P2812BF-08TR ASM3P2812BF-08TT ASM3P2814AF-08SR ASM3P2814AF-08ST ASM3P2814AF-08TR ASM3P2814AF-08TT ASM3P2814BF-08SR ASM3P2814BF-08ST ASM3P2814BF-08TR ASM3P2814BF-08TT ASM3I2811AF-08SR ASM3I2811AF-08ST ASM3I2811AF-08TR ASM3I2811AF-08TT ASM3I2811BF-08SR ASM3I2811BF-08ST ASM3I2811BF-08TR ASM3I2811BF-08TT ASM3I2812AF-08SR ASM3I2812AF-08ST ASM3I2812AF-08TR ASM3I2812AF-08TT ASM3I2812BF-08SR
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
Marking
3P2811AFS 3P2811AFS 3P2811AFT 3P2811AFT 3P2811BFS 3P2811BFS 3P2811BFT 3P2811BFT 3P2812AFS 3P2812AFS 3P2812AFT 3P2812AFT 3P2812BFS 3P2812BFS 3P2812BFT 3P2812BFT 3P2814AFS 3P2814AFS 3P2814AFT 3P2814AFT 3P2814BFS 3P2814BFS 3P2814BFT 3P2814BFT 3I2811AFS 3I2811AFS 3I2811AFT 3I2811AFT 3I2811BFS 3I2811BFS 3I2811BFT 3I2811BFT 3I2812AFS 3I2812AFS 3I2812AFT 3I2812AFT 3I2812BFS
Package Type
SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free
Temperature
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Ordering Codes (cont'd) Part Number
ASM3I2812BF-08ST ASM3I2812BF-08TR ASM3I2812BF-08TT ASM3I2814AF-08SR ASM3I2814AF-08ST ASM3I2814AF-08TR ASM3I2814AF-08TT ASM3I2814BF-08SR ASM3I2814BF-08ST ASM3I2814BF-08TR ASM3I2814BF-08TT ASM3P2811AG-08SR ASM3P2811AG-08ST ASM3P2811AG-08TR ASM3P2811AG-08TT ASM3P2811BG-08SR ASM3P2811BG-08ST ASM3P2811BG-08TR ASM3P2811BG-08TT ASM3P2812AG-08SR ASM3P2812AG-08ST ASM3P2812AG-08TR ASM3P2812AG-08TT ASM3P2812BG-08SR ASM3P2812BG-08ST ASM3P2812BG-08TR ASM3P2812BG-08TT ASM3P2814AG-08SR ASM3P2814AG-08ST ASM3P2814AG-08TR ASM3P2814AG-08TT ASM3P2814BG-08SR ASM3P2814BG-08ST ASM3P2814BG-08TR ASM3P2814BG-08TT ASM3I2811AG-08SR ASM3I2811AG-08ST
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
Marking
3I2812BFS 3I2812BFT 3I2812BFT 3I2814AFS 3I2814AFS 3I2814AFT 3I2814AFT 3I2814BFS 3I2814BFS 3I2814BFT 3I2814BFT 3P2811AGS 3P2811AGS 3P2811AGT 3P2811AGT 3P2811BGS 3P2811BGS 3P2811BGT 3P2811BGT 3P2812AGS 3P2812AGS 3P2812AGT 3P2812AGT 3P2812BGS 3P2812BGS 3P2812BGT 3P2812BGT 3P2814AGS 3P2814AGS 3P2814AGT 3P2814AGT 3P2814BGS 3P2814BGS 3P2814BGT 3P2814BGT 3I2811AGS 3I2811AGS
Package Type
SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Pb free SOIC - Tube, Pb free TSSOP - Tape & Reel, Pb free TSSOP - Tube, Pb free SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green
Temperature
Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Industrial Industrial
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Ordering Codes (cont'd) Part Number
ASM3I2811AG-08TR ASM3I2811AG-08TT ASM3I2811BG-08SR ASM3I2811BG-08ST ASM3I2811BG-08TR ASM3I2811BG-08TT ASM3I2812AG-08SR ASM3I2812AG-08ST ASM3I2812AG-08TR ASM3I2812AG-08TT ASM3I2812BG-08SR ASM3I2812BG-08ST ASM3I2812BG-08TR ASM3I2812BG-08TT ASM3I2814AG-08SR ASM3I2814AG-08ST ASM3I2814AG-08TR ASM3I2814AG-08TT ASM3I2814BG-08SR ASM3I2814BG-08ST ASM3I2814BG-08TR ASM3I2814BG-08TT
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
Marking
3I2811AGT 3I2811AGT 3I2811BGS 3I2811BGS 3I2811BGT 3I2811BGT 3I2812AGS 3I2812AGS 3I2812AGT 3I2812AGT 3I2812BGS 3I2812BGS 3I2812BGT 3I2812BGT 3I2814AGS 3I2814AGS 3I2814AGT 3I2814AGT 3I2814BGS 3I2814BGS 3I2814BGT 3I2814BGT
Package Type
TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green SOIC - Tape & Reel, Green SOIC - Tube, Green TSSOP - Tape & Reel, Green TSSOP - Tube, Green
Temperature
Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
Device Ordering Information
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
ASM3P2811AG-08SR
R = Tape & Reel, T = Tube or Tray O = TSOT23 S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 J=TSOT26 C=TDFN (2X2) COL
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 = Clock Generator 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
PulseCore Semiconductor Mixed Signal Product
.
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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April 2008 rev 1.6
ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B
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 Numbers: ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B Document Version: 1.6
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 Many PulseCore Semiconductor products are protected by issued patents or by applications for patent
(c) Copyright 2006 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.
Low Power EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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