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| ASM3P2598A Peak EMI Reducing Solution Features * Generates a 1X low EMI optimized clock signal at the output. * Integrated loop filter components. * Operates with a 3.3 / 2.5V Supply. * Operating current less than 5mA. * CMOS design. * Input frequency range: 60MHz to 120MHz for 2.5V 60MHz to 120MHz for 3.3V * Frequency deviation: 1.5 (Typ) @ 85MHz Output frequency. * Available in 6L-TSOP (6L-TSOT-23) Package. The ASM3P2598A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2598A 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 result 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 ASM3P2598A is targeted towards all portable devices with very low power requirements like MP3 players, MFP, LCD Panel Module and digital still cameras. Product Description The ASM3P2598A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2598A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2598A allows significant system cost savings by reducing the number of circuit board layers, ferrite beads and shielding that are traditionally required to pass EMI regulations. Key Specifications Description Supply voltages Cycle-to-Cycle Jitter Output Duty Cycle Modulation Rate Equation Frequency Deviation Specification VDD = 3.3V / 2.5V 360pS (Typ) 45/55% FIN/2560 1.5% (Typ) @ 85MHz Output Block Diagram VDD SSON Modulation CLKIN Frequency Divider Feedback Divider PLL Phase Detector Loop Filter VCO Output Divider ModOUT VSS (c)2010 SCILLC. All rights reserved. JANUARY 2010 - Rev. 1 Publication Order Number: ASM3P2598/D ASM3P2598A Pin Configuration (6L-TSOP Package) SSON NC 1 2 6 VSS ModOUT VDD ASM3P2598A 5 4 CLKIN 3 Pin Description Pin# 1 2 3 4 5 6 Pin Name SSON NC CLKIN VDD ModOUT VSS Type I I P O P Description When SSON is HIGH, the spread spectrum is enabled and when LOW, it turns off the spread spectrum. Connect the pin to ground When Spread Spectrum feature is not required. No Connect. Clock Input. Power supply for the entire chip. Spread spectrum clock output. Ground connection. Modulation Profile Specifications Description Frequency Range Modulation Equation Frequency Deviation For 2.5V Supply For 3.3V Supply Specification 60MHz < CLKIN < 120MHz 60MHz < CLKIN < 120MHz FIN/2560 1.5% (Typ) @ 85MHz Output Rev. 1 | Page 2 of 8 | www.onsemi.com ASM3P2598A 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 STD22- A114-B) 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. Parameter Rating -0.5 to +4.6 -65 to +125 260 150 2 Unit V C C C KV Voltage on any pin with respect to Ground Operating Conditions Parameter VDD TA CL CIN Supply Voltage Operating Temperature (Ambient Temperature) Load Capacitance Input Capacitance Description Min 2.375 0 Max 3.6 70 15 7 Unit V C pF pF DC Electrical Characteristics for 2.5V Supply Symbol Parameter VIL VIH IIL IIH VOL VOH IDD ICC VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current Output low voltage (VDD = 2.5V, IOL = 8mA) Output high voltage (VDD = 2.5V, IOH = 8mA) Static supply current Operating voltage Power-up time (first locked cycle after power-up) Output impedance 1 Min VSS-0.3 2.0 Typ Max 0.8 VDD+0.3 -35 35 0.6 Unit V V A A V V mA mA 1.8 1.8 4.0 2.375 2.5 50 2.625 5 Dynamic supply current (2.5V, 85MHz and no load) V mS Note: 1. CLKIN pin is pulled low. Rev. 1 | Page 3 of 8 | www.onsemi.com ASM3P2598A AC Electrical Characteristics for 2.5V Supply Symbol CLKIN ModOUT fd tLH tHL 1 1 Parameter Input frequency Output frequency Frequency Deviation Input Frequency = 60MHz Input Frequency = 120MHz Output rise time (measured from 0.7V to 1.7V) Output fall time (measured from 1.7V to 0.7V) Jitter (Cycle-to-cycle) Output duty cycle Min 60 60 Typ Max 120 120 Unit MHz MHz % 1.6 1.1 0.7 0.4 1.8 0.9 360 45 50 55 2.6 1.1 nS nS pS % tJC tD Note: 1. tLH and tHL are measured into a capacitive load of 15pF. DC Electrical Characteristics for 3.3V Supply Symbol Parameter VIL VIH IIL IIH VOL VOH IDD ICC VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current Output low voltage (VDD = 3.3V, IOL = 8mA) Output high voltage (VDD = 3.3V, IOH = 8mA) Static supply current Operating voltage Power-up time (first locked cycle after power-up) Output impedance 1 Min VSS-0.3 2.0 Typ Max 0.8 VDD+0.3 -35 35 0.4 Unit V V A A V V mA mA 2.5 2.2 4.5 3.0 3.3 45 3.6 5 Dynamic supply current (3.3V, 85MHz and no load) V mS Note: 1. CLKIN pin is pulled low. AC Electrical Characteristics for 3.3V Supply Symbol CLKIN ModOUT fd tLH tHL 1 1 Parameter Input frequency Output frequency Frequency Deviation Input Frequency = 60MHz Input Frequency = 120MHz Min 60 60 Typ Max 120 120 Unit MHz MHz % 1.6 1.1 0.5 0.3 1.2 0.8 360 45 50 55 1.8 1.1 Output rise time (measured from 0.8 to 2.0V) Output fall time (measured at 2.0V to 0.8V) Jitter (cycle-to-cycle) Output duty cycle nS nS pS % tJC tD Note: 1. tLH and tHL are measured into a capacitive load of 15pF. Rev. 1 | Page 4 of 8 | www.onsemi.com ASM3P2598A Typical Application Schematic VDD C1 0.1F C2 2.2F VDD ASM3P2598A Rs ModOUT ModOUT Clock VSS Rev. 1 | Page 5 of 8 | www.onsemi.com ASM3P2598A Package Information 6L-TSOP Package Dimensions Symbol Min A A1 A2 b H D B e C L 0.00 0.033 0.012 Inches Max 0.04 0.004 0.036 0.02 Millimeters Min Max 1.00 0.00 0.84 0.30 0.127 BSC 2.90 BSC 1.60 BSC 0.950 BSC 2.80 BSC 0.30 0 0.50 4 0.10 0.90 0.50 0.005 BSC 0.114 BSC 0.06 BSC 0.0374 BSC 0.11 BSC 0.0118 0 0.02 4 Rev. 1 | Page 6 of 8 | www.onsemi.com ASM3P2598A Ordering Information Part Number ASM3P2598AF-06OR Marking A11 Package Type 6L-TSOP (6L-TSOT-23), TAPE & REEL, Pb Free Temperature 0 to +70 C C A "microdot" placed at the end of last row of marking or just below the last row toward the center of package indicates Pb-free. Licensed under US Patent #5,488,627 and #5,631,921. Rev. 1 | Page 7 of 8 | www.onsemi.com ASM3P2598A Note: This product utilizes US Patent #6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003. 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. U.S Patent Pending; Timing-Safe and Active Bead are trademarks of PulseCore Semiconductor, a wholly owned subsidiary of ON Semiconductor. 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: orderlit@onsemi.com 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 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative |
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