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November 2006 rev 1.1 Peak Reducing EMI Solution
Features
* * * *
P2180 / 81 / 82 / 83 / 84
FCC approved method of EMI attenuation. Provides up to 15dB EMI reduction. Generates a 1X low EMI spread spectrum clock from the input frequency. Optimized for frequency range:
* * *
* * * * * *
Eight spread % selections:
*
0.625% to -3.5%.
3.3V operating voltage. CMOS/TTL compatible inputs and outputs. Low-power CMOS design. Supports notebook VGA and other LCD timing controller applications. Drop-in replacement to Cypress W180/1. Products are available for industrial temperature range. Available in 8-pin SOIC and TSSOP packages.
P2180 / 84: 20MHz to 40MHz P2181: 60MHz to 160MHz P2182 / 83: 10MHz to 20MHz loop filter minimizes external
* * *
Internal
* *
components and board space. Selectable spread options: Down Spread and Center Spread. Low inherent cycle-to-cycle jitter.
Product Description
The P2180/81X is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies from 20MHz to 40MHz and 60MHz to 160MHz (Refer Input Frequency and Modulation Rate Table.) The P2180/81X can generate an EMI reduced clock form an OSC or a system generated clock. The P2180/81A to P2180/81D offer various combinations of spread options and percentage deviations. (Refer Spread Deviation Selections Table.) These combinations include Down and Center Spread and percentage deviation range from 0.625% to -3.50%. The P2180/81X reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P2180/81X allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations.
The P2180/81X modulates the output of a single PLL in order to "spread" the bandwidth of a synthesized clock, thereby decreasing 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 clock generators. Lowering EMI by increasing a signal's bandwidth is called spread spectrum clock generation. The P2180/81X uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all-digital method.
Applications
The P2180/81X 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.
November 2006 rev 1.1 Block Diagram
SRS VDD
P2180 / 81 / 82 / 83 / 84
Modulation XIN Crystal Oscillator XOUT Feedback Divider Frequency Divider Phase Detector Loop Filter
PLL
VCO
Output Divider ModOUT
VSS
Pin Diagram
XIN 1 NC 2 VSS 3 SRS 4
XIN
1
8
NC
8
XOUT
NC 2 VSS 3 SRS 4
P2180X P2181X P2182X
7 NC 6 VDD 5 ModOUT
P2183X P2184X
7 NC 6 VDD 5 ModOUT
Pin Description
Pin#
1 2 3 4 5 6 7 8 8*
Pin Name
XIN NC VSS SRS ModOUT VDD NC NC XOUT
Type
I P I O P No connect.
Description
Connect to externally generated clock signal or crystal. Ground to entire chip. Spread Range Select. Digital logic input used to select frequency deviation (Refer Spread Deviation Selections Table). This pin has an internal pull-up resistor. Spread spectrum low EMI output. Connect to +3.3V. No connect. No connect.
O
Crystal connection.
* Available for P2183 and P2184 only.
Low EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1 Input Frequency and Modulation Rate
Part Number P2180/P2184 P2181 P2182/P2183 Input Frequency Range (MHz) 20 to 40 60 to 160 10 to 20
P2180 / 81 / 82 / 83 / 84
Output Frequency Range (MHz) 20 to 40 60 to 160 10 to 20
Modulation Rate Input frequency / 768 Input frequency / 2048 TBD
Spread Deviation Selections
Part Number P2180/1/2/3/4 A P2180/1/2/3/4 B P2180/1/2/3/4 C P2180/1/2/3/4 D SRS 0 1 0 1 0 1 0 1 Spread Deviation -1.25% (Down) -1.75% (Down) 1.25% (Center) 1.75% (Center) -2.50% (Down) -3.50 (Down) 0.625%(Center) 0.875% (Center)
Absolute Maximum Ratings Symbol
VDD, VIN TSTG TA Ts TJ TDV Storage temperature Operating 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 0 to +70 260 150 2
Unit
V C 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 EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
DC Electrical Characteristics
Unless otherwise noted, VDD = 3.3V and TA =25C
P2180 / 81 / 82 / 83 / 84
Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH ICC IDD VDD tON ZOUT Input low voltage Input high voltage
Parameter
Min GND - 0.3 -60.0 2.00 2.8 8.6 fIN - min -
Typ 4.5 3.3 -
Max 0.8 VDD + 0.3 -20.0 1.00 12.00 12.00 0.4 27.0 fIN - max -
Unit V V A A mA mA V V mA mA V mS
Input low current (input SRS) 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 and 10pF loading) Static supply current standby mode Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance
AC Electrical Characteristics
Symbol fIN fOUT 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 10 10 -200 45 Typ 0.69 0.66 50 Max 160 160 200 55 Unit MHz MHz ns ns ps %
* tLH and tHL are measured into a capacitive load of 15pF
Low EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
Package Information 8-Pin SOIC Package
P2180 / 81 / 82 / 83 / 84
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 EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
8-Pin TSSOP
P2180 / 81 / 82 / 83 / 84
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
Low EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
P2180 / 81 / 82 / 83 / 84
Ordering Information Part number
P218XxF-08-ST P218XxF-08-SR P218XxF-08-TT P218XxF-08-TR P218XxG-08-ST P218XxG-08-SR P218XxG-08-TT P218XxG-08-TR
Note: X= 0 / 1 / 2 / 3 / 4 x= A / B / C / D
Marking
P2181XxF P2181XxF P2181XxF P2181XxF P2181XxG P2181XxG P2181XxG P2181XxG
Package Type
8-Pin SOIC, Tube, Pb Free 8-Pin SOIC, Tape and Reel, Pb Free 8-Pin TSSOP, Tube, Pb Free 8-Pin TSSOP, Tape and Reel, Pb Free 8-Pin SOIC, Tube, Green 8-Pin SOIC, Tape and Reel, Green 8-Pin TSSOP, Tube, Green 8-Pin TSSOP, Tape and Reel, Green
Temperature
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
Device Ordering Information
P 218X x
F - 08
ST
SR - SOIC, T/R TT - TSSOP, TUBE TR - TSSOP, T/R ST - SOIC, TUBE DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS Deviation (%) and Spread option Identifier DEVICE NUMBER P = Commercial Temperature Range (0C to 70C) I = Industrial Temperature Range (-40C to 85C)
Low EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
Licensed under US patent numbers 5,488,627 and 5,631,920.
P2180 / 81 / 82 / 83 / 84
Low EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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November 2006 rev 1.1
P2180 / 81 / 82 / 83 / 84
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: P2180/81/82/83/84 Document Version: v1.1
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
(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 EMI Clock for Mobile VGA
Notice: The information in this document is subject to change without notice.
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