ASM3P2183A EMI Reduction IC Description The ASM3P2183A is a versatile spread spectrum frequency modulator designed specifically for a wide range of input clock frequencies from 6 MHz to 90 MHz. (Refer to 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%. 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.’ 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. http://onsemi.com SOIC−8 S SUFFIX CASE 751BD TSSOP−8 T SUFFIX CASE 948AL PIN CONFIGURATION XIN / CLKIN 1 FS1 XOUT FS0 VSS VDD ModOUT SS% (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. Features • FCC Approved Method of EMI Attenuation • Provides up to 15 dB EMI Reduction • Generates a 1X Low EMI Spread Spectrum Clock of the Input Frequency • Input Frequency Range: 6 MHz to 90 MHz • 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 ± 0.3 V 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 These are Pb−Free Devices © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. 3 1 Publication Order Number: ASM3P2183A/D ASM3P2183A VDD SS% FS0 FS1 PLL Modulation XIN/CLKIN Crystal Oscillator Frequency Divider XOUT Loop Filter Phase Detector Feedback Divider Output Divider VCO ModOUT VSS Figure 1. Block Diagram Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 XIN / CLKIN I 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. 2 XOUT I Crystal connection. Input connection for an external crystal. If using an external reference, this pin must be left unconnected. 3 VSS P Ground to entire chip. 4 SS% I Spread range select. Digital logic input used to select frequency deviation (Refer to Spread Deviation Selection Table). This pin has an internal pull−up resistor. 5 ModOUT O Spread spectrum low EMI output. 6 VDD P Power supply for the entire chip. 7 FS0 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. 8 FS1 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. Table 2. INPUT FREQUENCY AND MODULATION RATE TABLE FS1 (pin 8) FS0 (pin 7) Frequency Range 0 0 6 MHz to 13 MHz 0 1 12 MHz to 25 MHz 1 0 25 MHz to 50 MHz 1 1 50 MHz to 90 MHz Table 3. SPREAD DEVIATION SELECTION TABLE SS% (pin 4) Spread Deviation (%) 0 − 1.25 1 ± 0.42 http://onsemi.com 2 ASM3P2183A Table 4. ABSOLUTE MAXIMUM RATINGS Symbol VDD, VIN TSTG Parameter Rating Unit Voltage on any pin with respect to Ground −0.5 to +4.6 V Storage temperature −65 to +125 °C °C Ts Max. Soldering Temperature (10 sec) 260 TJ Junction Temperature 150 °C 2 KV TDV Static Discharge Voltage (As per JEDEC STD22− A114−B) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 5. RECOMMENDED OPERATING CONDITIONS Symbol TA VDD Parameter Min Operating Temperature Typ 0 Core Voltage Max Unit +70 °C +3.0 +3.3 +3.6 V Table 6. DC ELECTRICAL CHARACTERISTICS Symbol Min Typ Max Unit VIL Input low voltage Parameter VSS − 0.3 − 0.8 V VIH Input high voltage 2.0 − VDD + 0.3 V IIL Input low current − − −35 mA IIH Input high current − − 35 mA IXOL XOUT Output low current (@ 0.4 V, VDD = 3.3 V) − 3 − mA IXOH XOUT Output high current (@ 2.5 V, VDD = 3.3 V) − 3 − mA VOL Output low voltage (VDD = 3.3 V, IOL = 20 mA) − − 0.4 V VOH Output high voltage (VDD = 3.3 V, IOH = 20 mA) 2.5 − − V ICC Dynamic supply current Normal mode (3.3 V, 90 MHz and 10 pF loading) − 28 − mA IDD Static supply current (Note 1) VDD Operating voltage tON ZOUT − 7.0 − mA 3.0 3.3 3.6 V Power up time (first locked clock cycle after power up) − 0.18 − mS Clock out impedance − 50 − W Min Typ Max Unit Input frequency 6 − 90 MHz Output frequency 6 − 90 MHz 1.1 nS 1. XIN /CLKIN pin is pulled low. Table 7. AC ELECTRICAL CHARACTERISTICS Symbol fIN ModOUT Parameter tLH (Note 2) Output rise time (measured at 0.8 V to 2.0 V) 0.3 0.9 tHL (Note 2) Output fall time (measured at 2.0 V to 0.8 V) 0.5 1.0 1.2 nS tJC Jitter (cycle to cycle) − − 200 pS TD Output duty cycle 45 50 55 % 2. tLH and tHL are measured with a capacitive load of 15 pF at 27 MHz. http://onsemi.com 3 ASM3P2183A PACKAGE DIMENSIONS TSSOP8, 4.4x3 CASE 948AL−01 ISSUE O b SYMBOL MIN NOM A E1 E MAX 1.20 A1 0.05 A2 0.80 b 0.19 0.30 c 0.09 0.20 D 2.90 3.00 3.10 E 6.30 6.40 6.50 E1 4.30 4.40 4.50 0.15 0.90 e 0.65 BSC L 1.00 REF L1 0.50 θ 0º 0.60 1.05 0.75 8º e TOP VIEW D A2 c q1 A A1 L1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-153. http://onsemi.com 4 ASM3P2183A PACKAGE DIMENSIONS SOIC 8, 150 mils CASE 751BD−01 ISSUE O E1 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 4.00 MAX 1.27 BSC e PIN # 1 IDENTIFICATION NOM h 0.25 0.50 L 0.40 1.27 θ 0º 8º TOP VIEW D h A1 θ A c e b L END VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. http://onsemi.com 5 ASM3P2183A Table 8. ORDERING INFORMATION Part Number Marking Package Type Temperature ASM3P2183A−08ST 3P2183A 8−Pin SOIC, TUBE Commercial ASM3P2183A−08SR 3P2183A 8−Pin SOIC, TAPE & REEL Commercial ASM3P2183A−08TT 3P2183A 8−Pin TSSOP, TUBE Commercial ASM3P2183A−08TR 3P2183A 8−Pin TSSOP, TAPE & REEL Commercial ASM3P2183AF−08ST 3P2183AF 8−Pin SOIC, TUBE, Pb Free Commercial ASM3P2183AF−08SR 3P2183AF 8−Pin SOIC, TAPE & REEL, Pb Free Commercial ASM3P2183AF−08TT 3P2183AF 8−Pin TSSOP, TUBE, Pb Free Commercial ASM3P2183AF−08TR 3P2183AF 8−Pin TSSOP, TAPE & REEL, Pb Free Commercial ASM3P2183AG−08ST 3P2183AG 8−Pin SOIC, TUBE, Green Commercial ASM3P2183AG−08SR 3P2183AG 8−Pin SOIC, TAPE & REEL, Green Commercial ASM3P2183AG−08TT 3P2183AG 8−Pin TSSOP, TUBE, Green Commercial ASM3P2183AG−08TR 3P2183AG 8−Pin TSSOP, TAPE & REEL, Green Commercial ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 6 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative ASM3P2183A/D