ASM3P2760A Low Power Peak EMI Reducing Solution Features The ASM3P2760A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. Generates an EMI optimized clock signal at the output. Integrated loop filter components. The ASM3P2760A 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 signals bandwidth is called spread spectrum clock generation. Operates with a 3.3V / 2.5V Supply. Operating current less than 4mA. Low power CMOS design. Input frequency range: 6MHz to 12MHz for 2.5V. 6MHz to 13MHz for 3.3V. Generates a 1X low EMI spread spectrum clock of the input frequency. Frequency deviation: 0.65% @ 8MHz. Applications Available in 6-pin TSOT-23, 8-pin SOIC and The ASM3P2760A is targeted towards all portable 8-pin TSSOP Packages. devices with very low power requirements like MP3 players and digital still cameras. Product Description The ASM3P2760A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2760A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2760A 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 Specification Supply voltages VDD = 3.3V / 2.5V Cycle-to-Cycle Jitter 200pS (Max) Output Duty Cycle 45/55% Modulation Rate Equation FIN/256 Frequency Deviation 0.65% @ 8MHz Block Diagram VDD PD PLL Modulation XIN XOUT Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider ModOUT VSS (c)2010 SCILLC. All rights reserved. JANUARY 2010 - Rev. 2 Publication Order Number: ASM3P2760/D ASM3P2760A Pin Configuration (6-pin TSOT-23 Package) PD 1 XOUT 2 ASM3P2760A XIN / CLKIN 3 6 VSS 5 ModOUT 4 VDD Pin Description Pin# 1 Pin Name PD Type Description I Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 XIN / CLKIN I Crystal connection or external reference frequency input. This pin has dual functions. It can be connected either to an external crystal or an external reference clock. 4 VDD P Power supply for the entire chip. 5 ModOUT O Spread spectrum clock output. 6 VSS P Ground connection. Rev. 2 | Page 2 of 12 | www.onsemi.com ASM3P2760A Pin Configuration (8-pin SOIC and TSSOP Packages) XIN / CLKIN 1 8 VDD 7 NC PD 3 6 ModOUT NC 4 5 VSS XOUT 2 ASM3P2760A Pin Description Pin# Pin Name Type 1 XIN / CLKIN I Crystal connection or external reference frequency input. This pin has dual functions. It can be connected either to an external crystal or an external reference clock. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. I Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. 3 PD Description 4 NC - No connect. 5 VSS P Ground connection. 6 ModOUT O Spread spectrum clock output. 7 NC - No connect. 8 VDD P Power supply for the entire chip. Modulation Profile Specification Description Frequency Range Specification For 2.5V Supply For 3.3V Supply 6MHz < CLKIN < 12MHz 6MHz < CLKIN < 13MHz Modulation Equation FIN/256 Frequency Deviation 0.65% @ 8MHz Rev. 2 | Page 3 of 12 | www.onsemi.com ASM3P2760A 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 TA Operating temperature -40 t0 +85 C Ts Max. Soldering Temperature (10 sec) 260 C TJ Junction Temperature 150 C 2 KV TDV 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. DC Electrical Characteristics for 2.5V Supply (Test condition: All parameters are measured at room temperature (+25C) unless otherwise stated.) Symbol Parameter Min Typ Max Unit V VIL Input low voltage VSS-0.3 - 0.8 VIH Input high voltage 2.0 - VDD+0.3 V IIL Input low current - - -35 A IIH Input high current - - 35 A IXOL XOUT output low current (@ 0.5V, VDD = 2.5V) - 3 - mA IXOH XOUT output high current (@ 1.8V, VDD = 2.5V) - 3 - mA VOL Output low voltage (VDD = 2.5V, IOL = 8mA) - - 0.6 V VOH Output high voltage (VDD = 2.5V, IOH = 8mA) 1.8 - - V 1 IDD Static supply current - - 10 A ICC Dynamic supply current (2.5V, 8MHz and no load) - 2.5 - mA 2.375 2.5 2.625 V - - 5 mS - 50 - VDD tON Operating Voltage Power-up time (first locked cycle after power-up) ZOUT 2 Output impedance Notes: 1. XIN / CLKIN pin and PD pin are pulled low. 2. VDD and XIN / CLKIN input are stable, PD pin is made high from low. AC Electrical Characteristics for 2.5V Supply Symbol CLKIN ModOUT fd Min Typ Max Unit Input frequency 6 - 12 MHz Output frequency 6 - 12 MHz Input Frequency = 6MHz - 1.0 - Input Frequency = 12MHz - 0.45 - Frequency Deviation % 1 Output rise time (measured from 0.7V to 1.7V) 0.4 1.2 1.4 nS 1 Output fall time (measured from 1.7V to 0.7V) 0.4 0.9 1.1 nS - - 200 pS 45 50 55 % tLH tHL Parameter tJC Jitter (cycle-to-cycle) tD Output duty cycle Note: 1. tLH and tHL are measured into a capacitive load of 15pF. Rev. 2 | Page 4 of 12 | www.onsemi.com ASM3P2760A DC Electrical Characteristics for 3.3V Supply (Test condition: All parameters are measured at room temperature (+25C) unless otherwise stated.) Symbol Parameter Min Typ Max Unit V VIL Input low voltage VSS-0.3 - 0.8 VIH Input high voltage 2.0 - VDD+0.3 V IIL Input low current - - -35 A IIH Input high current - - 35 A IXOL XOUT output low current (@ 0.4V, VDD = 3.3V) - 3 - mA IXOH XOUT output high current (@ 2.5V, VDD = 3.3V) - 3 - mA VOL Output low voltage (VDD = 3.3 V, IOL = 8mA) - - 0.4 V VOH Output high voltage (VDD = 3.3 V, IOH = 8mA) 2.5 - - V 1 IDD Static supply current - - 10 A ICC Dynamic supply current (3.3V, 8MHz and no load) - 3.0 - mA 2.7 3.3 3.6 V - - 5 mS - 45 - VDD Operating Voltage tON Power-up time (first locked cycle after power up) ZOUT 2 Output impedance Notes: 1. XIN / CLKIN pin and PD pin are pulled low. 2. VDD and XIN / CLKIN input are stable; PD pin is made high from low. AC Electrical Characteristics for 3.3V Supply Symbol CLKIN ModOUT fd Min Typ Max Unit Input frequency 6 - 13 MHz Output frequency 6 - 13 MHz Input Frequency = 6MHz - 1.0 - Input Frequency = 13MHz - 0.4 - Frequency Deviation % 1 Output rise time (measured at 0.8V to 2.0V) 0.5 1.3 1.5 nS 1 Output fall time (measured at 2.0V to 0.8V) 0.4 1.0 1.2 nS - - 200 pS 45 50 55 % tLH tHL Parameter tJC Jitter (cycle-to-cycle) tD Output duty cycle Note: 1. tLH and tHL are measured into a capacitive load of 15pF. Rev. 2 | Page 5 of 12 | www.onsemi.com ASM3P2760A Typical Crystal Oscillator Circuit R1 = 510 Crystal C1 = 27pF C2 = 27pF Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency 8.000MHz Frequency tolerance 50ppm or better at 25C Operating temperature range -25C to +85C Storage temperature -40C to +85C Load capacitance 18pF Shunt capacitance 7pF maximum ESR 25 Rev. 2 | Page 6 of 12 | www.onsemi.com ASM3P2760A Package Information 6-pin TSOT-23 Package Dimensions Symbol Inches Min A Millimeters Max Min Max 0.04 1.00 A1 0.00 0.004 0.00 0.10 A2 0.033 0.036 0.84 0.90 b 0.012 0.02 0.30 0.50 H 0.005 BSC 0.127 BSC D 0.114 BSC 2.90 BSC B 0.06 BSC 1.60 BSC e 0.0374 BSC 0.950 BSC C 0.11 BSC 2.80 BSC L 0.0118 0.02 0.30 0.50 0 4 0 4 Rev. 2 | Page 7 of 12 | www.onsemi.com ASM3P2760A 8-Pin SOIC Package H E D A2 A D C e A1 L B Dimensions Symbol Inches Min Max Millimeters Min Max A1 0.004 0.010 0.10 0.25 A 0.053 0.069 1.35 1.75 A2 0.049 0.059 1.25 1.50 B 0.012 0.020 0.31 0.51 C 0.007 0.010 0.18 0.25 D 0.193 BSC 4.90 BSC E 0.154 BSC 3.91 BSC e 0.050 BSC 1.27 BSC H 0.236 BSC 6.00 BSC L 0.016 0.050 0.41 1.27 0 8 0 8 Rev. 2 | Page 8 of 12 | www.onsemi.com ASM3P2760A 8-Pin TSSOP Package H E D A2 A C e A1 L B Dimensions Symbol Inches Min Millimeters Max A Min Max 0.043 1.10 A1 0.002 0.006 0.05 0.15 A2 0.033 0.037 0.85 0.95 B 0.008 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 0.026 BSC 0.65 BSC H 0.252 BSC 6.40 BSC L 0.020 0.028 0.50 0.70 0 8 0 8 Rev. 2 | Page 9 of 12 | www.onsemi.com ASM3P2760A Ordering Information Part Number Marking ASM3P2760AF-06OR E4LL ASM3P2760AF-08TT ASM3P2760AF-08TR Package Type Temperature 6-Pin TSOT-23, TAPE & REEL, Pb Free Commercial 3P2760AF 8-Pin TSSOP, TUBE, Pb Free Commercial 3P2760AF 8-Pin TSSOP, TAPE & REEL, Pb Free Commercial ASM3P2760AF-08ST 3P2760AF 8-Pin SOIC, TUBE, Pb Free Commercial ASM3P2760AF-08SR 3P2760AF 8-Pin SOIC, TAPE & REEL, Pb Free Commercial ASM3P2760AG-06OR E3LL 6-Pin TSOT-23, TAPE & REEL, Green Commercial ASM3P2760AG-08TT 3P2760AG 8-Pin TSSOP, TUBE, Green Commercial ASM3P2760AG-08TR 3P2760AG 8-Pin TSSOP, TAPE & REEL, Green Commercial ASM3P2760AG-08ST 3P2760AG 8-Pin SOIC, TUBE, Green Commercial ASM3P2760AG-08SR 3P2760AG 8-Pin SOIC, TAPE & REEL, Green Commercial ASM3I2760AF-06OR E5LL ASM3I2760AF-08TT ASM3I2760AF-08TR 6-Pin TSOT-23, TAPE & REEL, Pb Free Industrial 3I2760AF 8-Pin TSSOP, TUBE, Pb Free Industrial 3I2760AF 8-Pin TSSOP, TAPE & REEL, Pb Free Industrial ASM3I2760AF-08ST 3I2760AF 8-Pin SOIC, TUBE, Pb Free Industrial ASM3I2760AF-08SR 3I2760AF 8-Pin SOIC, TAPE & REEL, Pb Free Industrial ASM3I2760AG-06OR E6LL 6-Pin TSOT-23, TAPE & REEL, Green Industrial ASM3I2760AG-08TT 3I2760AG 8-Pin TSSOP, TUBE, Green Industrial ASM3I2760AG-08TR 3I2760AG 8-Pin TSSOP, TAPE & REEL, Green Industrial ASM3I2760AG-08ST 3I2760AG 8-Pin SOIC, TUBE, Green Industrial ASM3I2760AG-08SR 3I2760AG 8-Pin SOIC, TAPE & REEL, Green Industrial Rev. 2 | Page 10 of 12 | www.onsemi.com ASM3P2760A Device Ordering Information A S M 3 P 2 7 6 0 A F - 0 8 T R R = Tape & Reel, T = Tube or Tray O = TSOT23 S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 J=TSOT26 DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS 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 ON Semiconductor Mixed Signal Product Licensed under US Patent #5,488,627 and #5,631,921. Rev. 2 | Page 11 of 12 | www.onsemi.com ASM3P2760A 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