ASM3P2869A August 2004 rev 2.0 Low Power Peak EMI Reducing Solution Features The ASM3P2869A uses the most efficient and optimized modulation profile approved by the FCC and is Generates an EMI optimized clocking signal at the implemented by using a proprietary all digital method. output. Integrated loop filter components. Operates with a 3.3V 10% supply. Operating current less than 6mA. Low power CMOS design. Input frequency range: 6MHz to 12MHz. Generates a 1X low EMI spread spectrum clock of The ASM3P2869A 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 the input frequency. by oscillators and most frequency generators. Lowering EMI by increasing a signal's bandwidth is called `spread Frequency deviation: 1%. Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin spectrum clock generation'. TSSOP packages. Applications Product Description The ASM3P2869A is targeted towards all portable The ASM3P2869A is a versatile spread spectrum devices with very low power requirements like MP3 frequency modulator designed specifically for a wide players, Notebooks and digital still cameras. range of clock frequencies. The ASM3P2869A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2869A allows significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding that are traditionally required to pass EMI regulations. Key Specifications Description Supply voltages VDD = 3.3V 10% Frequency Range 6MHz < CLKIN < 12MHz Cycle-to-Cycle Jitter 300 ps (maximum) Output Duty Cycle 40/60% (worst case) Output Rise and Fall Time 1.1 ns (maximum) Modulation Rate Equation FIN/256 Frequency Deviation 1% Block Diagram VDD PLL Modulation XIN Crystal Oscillator XOUT Specification Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider REFOUT 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. August 2004 ASM3P2869A rev 2.0 Pin Configuration (6-pin TSOT-23) REFOUT 1 XOUT 2 ASM3P2869A XIN/CLKIN 3 6 VSS 5 ModOUT 4 VDD Pin# Pin Name Type Description 1 REFOUT O Buffered output of the input frequency. 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 (3.3V) 5 ModOUT O Spread spectrum clock output. 6 VSS P Ground connection. Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 2 of 9 August 2004 ASM3P2869A rev 2.0 Pin Configuration (8-pin SOIC and TSSOP) XIN/CLKIN 1 8 VDD 7 NC REFOUT 3 6 ModOUT NC 4 5 VSS XOUT 2 ASM3P2869A Pin Description Pin# Pin Name Type 1 XIN/CLKIN I 2 XOUT O Description 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. Crystal connection. If using an external reference, this pin must be left unconnected. 3 REFOUT O Buffered output of the input frequency. 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 (3.3V) Modulation Profile Specification Description Specification Frequency Range 6MHz < CLKIN < 12MHz Modulation Equation FIN /256 Frequency Deviation 1% Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 3 of 9 August 2004 ASM3P2869A rev 2.0 Absolute Maximum Ratings Symbol Parameter Rating Unit Voltage on any pin with respect to Ground 0.5 to +7.0 V Storage temperature -65 to +125 C Operating temperature TA 0 to 70 C 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. VDD , VIN TSTG DC Electrical Characteristics (Test condition: All parameters are measured at room temperature (25C) unless otherwise stated). Symbol Parameter Min Typ Max Unit VIL Input low voltage GND - 0.3 - 0.8 V VIH IIL IIH Input high voltage Input low current Input high current 2.0 - - - - - VDD + 0.3 -35 35 V A A IXOL IXOH VOL XOUT output low current (@4.0V, VDD =3.3V) XOUT output high current (@2.5V, VDD =3.3V) Output low voltage (VDD = 3.3 V, IOL = 20 mA) - 3 3 - 0.4 mA mA V 2.5 - - - - 1.5 V mA - - 6 mA 3.0 - - 3.3 - 50 3.6 10 - V mS u VOH IDD Output high voltage (VDD = 3.3 V, IOH = 20 mA) Static supply current* Dynamic supply current (3.3V, 12MHz and 15pF ICC loading) VDD Operating voltage tON Power-up time (first locked cycle after power-up)** ZOUT Clock output impedance *XIN/CLKIN pin is pulled low **VDD and XIN/CLKIN input are stable, PD pin is made high from low. AC Electrical Characteristics Symbol Parameter Min Typ Max Unit CLKIN Input frequency 6 - 12 MHz ModOUT Output frequency 6 - 12 MHz tLH * Output rise time (measured at 0.8V to 2.0V) 0.5 0.7 1.1 ns tHL * Output fall time (measured at 2.0V to 0.8V) 0.5 0.7 1.0 ns tJC Jitter (cycle to cycle) - - 360 ps 45 50 55 % tD Output duty cycle *tLH and tHL are measured into a capacitive load of 15pF Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 4 of 9 August 2004 ASM3P2869A rev 2.0 Package Information 6-pin TSOT-23 b C B D e A1 A D A2 H L Symbol Dimensions in millimeters Dimensions in inches Min Max Min Max A - 1.00 - 0.040 A1 0 0.10 0 0.004 A2 0.87 REF 0.034 REF B 1.40 1.80 0.055 0.071 b 0.30 0.50 0.012 0.019 C 2.50 3.00 0.098 0.118 D 2.70 3.10 0.106 0.122 e H 0.95 BSC 0.10 L 0.037 BSC 0.35 0.004 MIN 0.20 0 0.014 MIN 0.008 8 0 8 Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 5 of 9 August 2004 ASM3P2869A rev 2.0 8-Pin SOIC H E D A2 D A e C A1 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 Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 6 of 9 August 2004 ASM3P2869A rev 2.0 8-Pin TSSOP H E D A2 A C e A1 L B Dimensions in inches Symbol Min 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 Max Dimensions in millimeters Min Max 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 0 8 0 8 Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 7 of 9 August 2004 ASM3P2869A rev 2.0 Ordering Information Part Number Marking ASM3P2869AF-06OR K4LL ASM3P2869AF-08TT Package Type Temperature 6-Pin TSOT-23, TAPE & REEL 0C - 70oC ASM3P2869AFT 8-Pin TSSOP, TUBE 0oC - 70oC ASM3P2869AF-08TR ASM3P2869AFT 8-Pin TSSOP, TAPE & REEL 0oC - 70oC ASM3P2869AF-08ST ASM3P2869AFS 8-Pin SOIC, TUBE 0oC - 70oC ASM3P2869AF-08SR ASM3P2869AFS 8-Pin SOIC, TAPE & REEL 0oC - 70oC ASM3P2869A-06OR K1LL 6-Pin TSOT-23, TAPE & REEL 0oC - 70oC ASM3P2869A-08TT ASM3P2869AT 8-Pin TSSOP, TUBE 0oC - 70oC ASM3P2869A-08TR ASM3P2869AT 8-Pin TSSOP, TAPE & REEL 0oC - 70oC ASM3P2869A-08ST ASM3P2869AS 8-Pin SOIC, TUBE 0oC - 70oC ASM3P2869A-08SR ASM3P2869AS 8-Pin SOIC, TAPE & REEL 0oC - 70oC Device Ordering Information A S M 3 P 2 8 6 9 A F - 0 8 T R OR - SOT23/T/R TT - TSSOP, TUBE TR - TSSOP, T/R VT - TVSOP, TUBE VR - TVSOP, T/R ST - SOIC, TUBE SR - SOIC, T/R QR - QFN, T/R QT - QFN, TUBE BT - BGA, TUBE BR - BGA, T/R PIN COUNT LEAD FREE PART PART NUMBER X = Automotive I = Industrial 1 - reserved 2 - Non PLL based 3 - EMI Reduction 4 - DDR support products 5 - STD Zero Delay Buffer P or n/c = Commercial 6 - power management 7 - power management 8 - power management 9 - Hi performance 0 - reserved Alliance Semiconductor Mixed Signal Product Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 8 of 9 August 2004 ASM3P2869A rev 2.0 Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Copyright y Alliance Semiconductor All Rights Reserved Preliminary Information Part Number: ASM3P2869A Document Version: v 2.0 8_30_2004 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003 (c) Copyright 2003 Alliance Semiconductor Corporation. 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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. Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 9 of 9