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August 2007 rev 1.5 LCD Panel 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: 25MHz to 210MHz. Internal loop filter minimizes external components and board space. Center spread. 4 spread frequency deviation selections: 0.13% to 1.24%. Low inherent Cycle-to-cycle jitter. 3.3V Operating Voltage. TTL or CMOS compatible inputs and outputs. 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.
ASM3P2182A
The ASM3P2182A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P2182A 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 ASM3P2182A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The ASM3P2182A 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 ASM3P2182A is a versatile spread spectrum frequency modulator designed specifically for a wide range of input clock frequencies from 25MHz to 210MHz. (Refer Input Frequency and Modulation Rate Table). The ASM3P2182A can generate an EMI reduced clock from an OSC or a system generated clock. The ASM3P2182A offers a Center Spread clock and with a percentage deviation from 0.13% or 1.24%.
FS0 FS1 S0
Applications
The ASM3P2182A 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.
VDD
Modulation CLKIN Crystal Oscillator Frequency Divider Feedback Divider
PLL
Phase Detector
Loop Filter
VCO
Output Divider ModOUT
VSS
LCD Panel EMI Reduction IC
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Pin Configuration
ASM3P2182A
CLKIN 1 GND 2 S1 3 S0 4
8 FS1 7 FS0 6 VDD 5 ModOUT
ASM3P2182A
Pin Description Pin#
1 2 3 4 5 6 7 8
Pin Name
CLKIN GND S1 S0 ModOUT VDD FS0 FS1
Type
I P I I O P I I
Description
Connect to externally generated clock signal. Ground to entire chip. Spread range select. Digital logic input used to select frequency deviation (Refer Spread Deviation Table). This pin has an internal pull-up resistor. Spread range select. Digital logic input used to select frequency deviation (Refer Spread Deviation Table). This pin has an internal pull-up resistor. Spread spectrum low EMI output. Power supply for the entire chip (3.3V). 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.
Input Frequency and Modulation Rate table FS1 (pin 8)
0 0 1 1
FS0 (pin 7)
0 1 0 1
Frequency Range
25MHz to 50MHz 50MHz to 103MHz 75MHz to 150MHz 160MHz to 210MHz
LCD Panel EMI Reduction IC
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Spread Deviation Selection table Spreading Range ( %) 81* 81** 108 MHz MHz MHz
0.12 0.2 0.4 0.9 0.18 0.5 0.8 1.4 0.15 0.3 0.6 1.1
ASM3P2182A
S1
0 0 1 1
S0
0 1 0 1
25 MHz
0.28 0.8 1.2 2.1
40 MHz
0.19 0.3 0.54 1.0
65 MHz
0.15 0.3 0.45 1.1
120 MHz
0.1 0.19 0.36 0.75
162 MHz
0.1 0.3 1.0 1.9
200 MHz
0.06 0.1 0.6 1.2
*Frequency Range- 50MHz to 103MHz ** Frequency Range- 75MHz to 150MHz
Absolute Maximum Ratings Symbol
VDD VIN VOUT TSTG Ts TJ TDV
Parameter
Supply Voltage pin with respect to Ground Input Voltage pin with respect to Ground Output Voltage pin with respect to Ground Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage(As per JEDEC STD22- A114-B)
Rating
-0.5 to +4.6 VSS-0.5 to VDD+0.5 VSS-0.5 to VDD+0.5 -55 to +125 260 150 2
Unit
V V 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 Parameter
VDD TA CL CIN Operating Voltage Operating Temperature (Ambient Temperature) Load Capacitance Input Capacitance 5
Description
Min
2.7 0
Typ
3.3
Max
3.7 +70 15
Unit
V C pF pF
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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DC Electrical Characteristics Symbol
VIL VIH IIL IIH VOL VOH ICC IDD VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current 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 out impedance 2.5 8.46 12 0.6 2.7 3.3 0.18 50
ASM3P2182A
Parameter
Min
GND - 0.3 2.0
Typ
Max
0.8 VDD + 0.3 -35 35 0.4
Unit
V V A A V V
17.78
mA mA
3.7
V mS
* CLKIN pin is pulled low
AC Electrical Characteristics Symbol
CLKIN 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 45 50
Parameter
Min
25 25 1.2 0.8
Typ
Max
210 210
Unit
MHz MHz nS nS pS %
1.32 0.9
1.4 1.0 360 55
*tLH and tHL are measured into a capacitive load of 15pF
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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Package Information
ASM3P2182A
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
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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ASM3P2182A
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
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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Ordering Information Part Number
ASM3P2182AF-08TT ASM3P2182AF-08TR ASM3P2182AF-08ST ASM3P2182AF-08SR ASM3P2182A-08TT ASM3P2182A-08TR ASM3P2182A-08ST ASM3P2182A-08SR ASM3P2182AG-08TT ASM3P2182AG-08TR ASM3P2182AG-08ST ASM3P2182AG-08SR
ASM3P2182A
Marking
3P2182AF 3P2182AF 3P2182AF 3P2182AF 3P2182A 3P2182A 3P2182A 3P2182A 3P2182AG 3P2182AG 3P2182AG 3P2182AG
Package
8-Pin TSSOP, TUBE, Pb Free 8-Pin TSSOP, TAPE & REEL, Pb Free 8-Pin SOIC, TUBE, Pb Free 8-Pin SOIC, TAPE & REEL, Pb Free 8-Pin TSSOP, TUBE 8-Pin TSSOP, TAPE & REEL 8-Pin SOIC, TUBE 8-Pin SOIC, TAPE & REEL 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin SOIC, TUBE, Green 8-Pin SOIC, TAPE & REEL, Green
Temperature
Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial
Device Ordering Information
ASM 3P
2182A F
08 TR
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 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
PulseCore Semiconductor Mixed Signal Product
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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ASM3P2182A
PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com
Copyright PulseCore Semiconductor All Rights Reserved Part Number: ASM3P2182A Document Version: 1.5
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.
LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
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