November 2003 ASM3P2182A rev 1.1 LCD Panel EMI Reduction IC Features FCC approved method of EMI attenuation. Provides up to 15dB EMI reduction. The ASM3P2182A reduces electromagnetic interference Generates a 1X low EMI spread spectrum clock of (EMI) at the clock source, allowing system wide reduction the input frequency. of EMI of Input frequency range: 25MHz to 210 MHz. signals. The ASM3P2182A allows significant system cost Internal loop filter minimizes external components savings by reducing the number of circuit board layers and board space. ferrite beads, shielding and other passive components Center spread. that are traditionally required to pass EMI regulations. 4 spread frequency deviation selections: ± 0.13% to ± 1.24%. The ASM3P2182A uses the most efficient and optimized Low inherent cycle-to-cycle jitter. modulation profile approved by the FCC and is 3.3V operating voltage range. implemented in a proprietary all digital method. TTL or CMOS compatible inputs and outputs. Low power CMOS design. The ASM3P2182A modulates the output of a single PLL Supports notebook VGA and other LCD timing in order to “spread” the bandwidth of a synthesized clock, controller applications. and more importantly, decreases the peak amplitudes of Products are available for industrial temperature its harmonics. This results in significantly lower system range. EMI compared to the typical narrow band signal produced Available in 8-pin SOIC and TSSOP. by oscillators and most frequency generators. Lowering down stream clock and data dependent EMI by increasing a signal’s bandwidth is called ‘spread 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%. spectrum clock generation’. 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. FS0 FS1 S0, S1 VDD Block Diagram PLL Modulation XIN Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider MODOUT VSS Alliance Semiconductor 2575, Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com Notice: The information in this document is subject to change without notice. ASM3P2182A X2105A Pin Configuration XIN 1 GND 2 8 FS1 7 FS0 ASM3P2182A S1 3 6 VDD S0 4 5 ModOUT Pin Description Pin# Pin Name Type Description 1 XIN I Connect to externally generated clock signal. 2 GND P 3 S1 I 4 S0 I 5 MODOUT O 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. 6 VDD P 7 FS0 I 8 FS1 I 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 FS0 (pin 7) 0 Frequency Range 25MHz to 50MHz 0 1 50MHz to 103 MHz 1 0 75MHz to 150MHz 1 1 160MHz to 210MHz Spread Deviation Selection Table S1 (pin 3) 0 0 1 1 S0 (pin 4) 0 1 0 1 Spread Deviation (%) ± 0.13 ± 0.41 ± 0.66 ± 1.24 LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 7 ASM3P2182A X2105A Absolute Maximum Ratings Symbol VDD, VIN Parameter Voltage on any pin with respect to GND Rating Unit -0.5 to + 7.0 V TSTG Storage temperature -65 to +125 °C TA Operating temperature 0 to 70 °C Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. DC Electrical Characteristics Symbol Parameter Min Typ Max Unit VIL Input low voltage GND – 0.3 - 0.8 V VIH Input high voltage 2.0 - VDD + 0.3 V IIL Input low current - - -35 µA IIH Input high current - - 35 µA VOL Output low voltage (VDD = 3.3V, IOL = 20mA) - - 0.4 V VOH Output high voltage (VDD = 3.3V, IOH = 20mA) 2.5 - - V 8.46 12 17.78 mA ICC IDD Dynamic supply current Normal mode (3.3V and 10pF loading) Static supply current Standby mode VDD Operating voltage tON ZOUT 0.6 mA 2.7 3.3 3.7 V Power up time (first locked clock cycle after power up) - 0.18 - mS Clock out impedance - 50 - Ω LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 7 ASM3P2182A X2105A AC Electrical Characteristics Symbol Parameter Min Typ Max Unit XIN Input frequency 25 - 210 MHz ModOUT Output frequency 25 - 210 MHz tLH* Output rise time (measured at 0.8V to 2.0V) 1.2 1.32 1.4 ns tHL* Output fall time (measured at 2.0V to 0.8V) 0.8 0.9 1.0 ns tJC Jitter (cycle to cycle) - - 360 ps TD Output duty cycle 45 50 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. 4 of 7 ASM3P2182A X2105A Package Information 8-Pin SOIC H E D A2 A C A1 D θ e L B Symbol Dimensions in inches Dimensions in millimeters Min Max Min Max A 0.057 0.071 1.45 1.80 A1 0.004 0.010 0.10 0.25 A2 0.053 0.069 1.35 1.75 B 0.012 0.020 0.31 0.51 C 0.004 0.01 0.10 0.25 D 0.186 0.202 4.72 5.12 E 0.148 0.164 3.75 4.15 e 0.050 BSC 1.27 BSC H 0.224 0.248 5.70 6.30 L 0.012 0.028 0.30 0.70 0° 8° 0° 8° LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 7 ASM3P2182A X2105A 8-Pin TSSOP H E D A2 A C θ e A1 L B Symbol Dimensions in inches Min Max Dimensions in millimeters Min Max A 0.047 A1 0.002 0.006 0.05 0.15 A2 0.031 0.041 0.80 1.05 B 0.007 0.012 0.19 0.30 C 0.004 0.008 0.09 0.20 D 0.114 0.122 2.90 3.10 E 0.169 0.177 4.30 4.50 e 1.10 0.026 BSC 0.65 BSC H 0.244 0.260 6.20 6.60 L 0.018 0.030 0.45 0.75 θ 0° 8° 0° 8° 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. 6 of 7 ASM3P2182A X2105A Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Copyright © Alliance Semiconductor All Rights Reserved Preliminary Information Part Number: ASM3P2182A Document Version: v1.1 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003 © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance 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. Alliance 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 Alliance 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 Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance 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 Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. LCD Panel EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 7