ASM3I2769A-08TT

September 2005 rev 1.8 Low Power Peak EMI Reducing Solution Features Generates an EMI optimized clock signal at the output. Integrated loop filter components. 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: ±1% @ 10MHz Available in 6 pin TSOT-23, 8 pin SOIC and 8 pin TSSOP Packages. ASM3P2769A The ASM3P2769A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2769A 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 ASM3P2769A is targeted towards all portable devices with very low power requirements like MP3 players and digital still cameras. Product Description The ASM3P2769A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2769A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2769A 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 Cycle-to-Cycle Jitter Output Duty Cycle Modulation Rate Equation Frequency Deviation Specification VDD = 3.3V / 2.5V 200pS (Max) 45/55% FIN/256 ±1% @ 10MHz Block Diagram VDD PD XIN Crystal Oscillator Frequency Divider Feedback Divider Modulation PLL XOUT 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. September 2005 rev 1. 8 Pin Configuration (6-pin TSOT-23 Package) ASM3P2769A PD 1 XOUT 2 6 VSS ModOUT VDD ASM3P2769A 5 4 XIN/CLKIN 3 Pin Description Pin# 1 2 3 4 5 6 Pin Name PD XOUT XIN/CLKIN VDD ModOUT VSS Type I O I P O P Description Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. Crystal connection. If using an external reference, this pin must be left unconnected. 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. Power supply for the entire chip. Spread spectrum clock output. Ground connection. Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 2 of 12 September 2005 rev 1. 8 Pin Configuration (8-pin SOIC and TSSOP Packages) ASM3P2769A XIN/CLKIN 1 XOUT 2 8 7 6 5 VDD NC ModOUT VSS ASM3P2769A PD 3 NC 4 Pin Description Pin# 1 2 3 4 5 6 7 8 Pin Name XIN/CLKIN XOUT PD NC VSS ModOUT NC VDD Type I O I P O P 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. Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not used. No connect. Ground connection. Spread spectrum clock output. No connect. Power supply for the entire chip. Modulation Profile Specification Description Frequency Range For 2.5V Supply For 3.3V Supply Modulation Equation Frequency Deviation Specification 6MHz < CLKIN < 12MHz 6MHz < CLKIN < 13MHz FIN/256 ±1% @ 10MHz Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 3 of 12 September 2005 rev 1. 8 Absolute Maximum Ratings Symbol VDD, VIN TSTG TA Ts TJ TDV Storage temperature Operating temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B) ASM3P2769A Parameter Rating -0.5 to +7.0 -65 to +125 0 to 70 260 150 2 Unit V °C °C °C °C KV Voltage on any pin with respect to Ground 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 (+25°C) unless otherwise stated.) Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current Parameter Min VSS-0.3 2.0 1.8 2.375 - Typ 3 3 2.5 2.5 50 Max 0.8 VDD+0.3 -35 35 0.6 10 2.625 5 - Unit V V µA µA mA mA V V µA mA V mS Ω XOUT output low current (@0.5V, VDD=2.5V) XOUT output high current (@1.8V, VDD=2.5V) Output low voltage (VDD = 2.5 V, IOL = 8mA) Output high voltage (VDD = 2.5 V, IOH = 8mA) Static supply current * Dynamic supply current (2.5V, 10MHz and with no load) Operating Voltage Power-up time(first locked cycle after power up)** Output impedance * XIN/CLKIN pin and PD pin are pulled low ** 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 tLH* tHL* tJC tD Input frequency Output frequency Frequency Deviation Input Frequency = 6MHz Input Frequency = 12MHz Parameter Min 6 6 0.6 0.4 45 Typ ±1.55 ±0.8 1.2 0.9 50 Max 12 12 1.5 1.1 200 55 Unit MHz MHz % nS nS pS % Output rise time (measured at 0.7V to 1.7V) Output fall time (measured at 1.7V to 0.7V) Jitter (cycle to cycle) 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 12 September 2005 rev 1. 8 DC Electrical Characteristics for 3.3V Supply (Test condition: All parameters are measured at room temperature (+25°C) unless otherwise stated). ASM3P2769A Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD tON ZOUT Input low voltage Input high voltage Input low current Input high current Parameter Min VSS - 0.3 2.0 2.5 2.7 - Typ 3 3 3.5 3.3 45 Max 0.8 VDD + 0.3 -35 35 0.4 10 3.6 5 - Unit V V µA µA mA mA V V µA mA V mS Ω XOUT output low current (@0.4V, VDD=3.3V) XOUT output high current (@2.5V, VDD=3.3V) Output low voltage (VDD = 3.3 V, IOL = 8mA) Output high voltage (VDD = 3.3 V, IOH = 8mA) Static supply current * Dynamic supply current (3.3V, 10MHz and with no load) Operating Voltage Power-up time(first locked cycle after power up)** Output impedance * XIN/CLKIN pin and PD pin are pulled low ** 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 tLH* tHL* tJC tD Input frequency Output frequency Frequency Deviation Input Frequency = 6MHz Input Frequency = 13MHz Parameter Min 6 6 0.4 0.3 45 Typ ±1.55 ±0.75 1.2 0.9 50 Max 13 13 1.4 1.1 200 55 Unit MHz MHz % nS nS pS % Output rise time (measured at 0.8V to 2.0V) Output fall time (measured at 2.0V to 0.8V) Jitter (cycle to cycle) 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. 5 of 12 September 2005 rev 1. 8 Typical Crystal Oscillator Circuit ASM3P2769A Crystal R1 = 510Ω C1 = 27 pF C2 = 27 pF Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance ESR 8.000MHz ± 50 ppm or better at 25°C -25°C to +85°C -40°C to +85°C 18pF 7pF maximum 25Ω Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 6 of 12 September 2005 rev 1. 8 Package Information 6-pin TSOT-23 Package ASM3P2769A Dimensions Symbol Min A A1 A2 b H D B e C L θ 0.00 0.033 0.012 Inches Max 0.04 0.004 0.036 0.02 Millimeters Min 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° Max 1.00 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° Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 7 of 12 September 2005 rev 1. 8 ASM3P2769A 8-Pin SOIC Package E H D A2 A θ e B A 1 C L D Dimensions Symbol Min A1 A A2 B C D E e H L θ Inches Max 0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007 Millimeters Min 0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0° 1.27 8° Max 0.25 1.75 1.50 0.51 0.25 0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0° 0.050 8° Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 8 of 12 September 2005 rev 1. 8 8-Pin TSSOP Package ASM3P2769A H E D A2 A θ e B A1 L C Dimensions Symbol Min A A1 A2 B c D E e H L θ 0.020 0° 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8° 0.50 0° Inches Max 0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30 Millimeters Min Max 1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8° Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 9 of 12 September 2005 rev 1. 8 Ordering Information Part Number ASM3P2769AF-06OR ASM3P2769AF-08TT ASM3P2769AF-08TR ASM3P2769AF-08ST ASM3P2769AF-08SR ASM3P2769AG-06OR ASM3P2769AG-08TT ASM3P2769AG-08TR ASM3P2769AG-08ST ASM3P2769AG-08SR ASM3P2769A-06OR ASM3P2769A-08TT ASM3P2769A-08TR ASM3P2769A-08ST ASM3P2769A-08SR ASM3I2769AF-06OR ASM3I2769AF-08TT ASM3I2769AF-08TR ASM3I2769AF-08ST ASM3I2769AF-08SR ASM3I2769AG-06OR ASM3I2769AG-08TT ASM3I2769AG-08TR ASM3I2769AG-08ST ASM3I2769AG-08SR ASM3I2769A-06OR ASM3I2769A-08TT ASM3I2769A-08TR ASM3I2769A-08ST ASM3I2769A-08SR ASM3P2769A Marking F4LL 3P2769AF 3P2769AF 3P2769AF 3P2769AF F3LL 3P2769AG 3P2769AG 3P2769AG 3P2769AG F1LL 3P2769A 3P2769A 3P2769A 3P2769A F5LL 3I2769AF 3I2769AF 3I2769AF 3I2769AF F6LL 3I2769AG 3I2769AG 3I2769AG 3I2769AG F2LL 3I2769A 3I2769A 3I2769A 3I2769A Package Type 6-Pin TSOT-23, TAPE & REEL, Pb Free 8-Pin TSSOP, TUBE, Pb Free 8-Pin TSSOP, TAPE & REEL, Pb Free 8-Pin SOIC, TUBE, Pb Free 8-Pin SOIC, TAPE & REEL, Pb Free 6-Pin TSOT-23, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin SOIC, TUBE, Green 8-Pin SOIC, TAPE & REEL, Green 6-Pin TSOT-23, TAPE & REEL 8-Pin TSSOP, TUBE 8-Pin TSSOP, TAPE & REEL 8-Pin SOIC, TUBE 8-Pin SOIC, TAPE & REEL 6-Pin TSOT-23, TAPE & REEL, Pb Free 8-Pin TSSOP, TUBE, Pb Free 8-Pin TSSOP, TAPE & REEL, Pb Free 8-Pin SOIC, TUBE, Pb Free 8-Pin SOIC, TAPE & REEL, Pb Free 6-Pin TSOT-23, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin SOIC, TUBE, Green 8-Pin SOIC, TAPE & REEL, Green 6-Pin TSOT-23, TAPE & REEL 8-Pin TSSOP, TUBE 8-Pin TSSOP, TAPE & REEL 8-Pin SOIC, TUBE 8-Pin SOIC, TAPE & REEL Temperature Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Industrial Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 10 of 12 September 2005 rev 1. 8 Device Ordering Information ASM3P2769A ASM3P2769AF-08TR R = Tape & reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE 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 U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 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. 11 of 12 September 2005 rev 1. 8 ASM3P2769A 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: ASM3P2769A Document Version: v1.8 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. 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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. 12 of 12