ASM3P2187A/B May 2008 rev 0.2 Spread Spectrum Clock Generator for Mobile Applications Product Description Features • Generates a 4X EMI optimized clock signal at the Output. • Input frequency The ASM3P2187A/B is a versatile spread spectrum frequency modulator designed specifically for a wide : 12.5MHz to 20MHz range of clock frequencies. The ASM3P2187A/B reduces • Output frequency : 50MHz to 80MHz electromagnetic interference (EMI) at the clock source, • SSON/PDB option allowing system wide reduction of EMI of • Selectable Centre Spread : dependent ± 0.5%, ± 1.0% signals. The all clock ASM3P2187A/B allows significant system cost savings by reducing the number of • Low power CMOS design circuit board layers ferrite beads, • Supply Voltage : 3.3V ± 0.3V traditionally required to pass EMI regulations. • Industrial Temperature range ASM3P2187A device has an option of Spread ON/OFF • 8-pin TSSOP Package and ASM3P2187B device has Powerdown option shielding that are • Drop-in replacement for MB88155-412 Device Application The ASM3P2187A/B is targeted towards mobile phones, mobile audio players and PDAs. Block Diagram VDD SEL SSON/PDB PLL Modulation CLKIN/XIN XOUT Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider ModOUT REFOUT VSS PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018 www.pulsecoresemi.com Notice: The information in this document is subject to change without notice. ASM3P2187A/B May 2008 rev 0.2 Pin Configurations 8 VDD 7 ModOUT 3 6 VSS SEL 4 5 REFOUT CLKIN/ XIN 1 8 VDD 7 ModOUT 3 6 VSS SEL 4 5 REFOUT CLKIN/ XIN 1 XOUT 2 ASM3P2187A SSON XOUT 2 ASM3P2187B PDB Pin Description Pin# Pin Name Type Description 1 CLKIN/XIN I External reference Clock input or Crystal connection. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 SSON / PDB* I Modulation enable pin/ Power down pin. Has an Internal pull up resistor 4 SEL I Modulation rate setting pin Centre spread, SEL = “L” : Frequency Deviation ± 0.5% Centre spread, SEL = “H” : Frequency Deviation ± 1.0% Has an Internal pull up resistor. 5 REFOUT O Non-modulated clock output pin. The Frequency is same as input frequency. This pin becomes to “L” at power-down. 6 VSS P Ground Connection. Connect to system ground. 7 ModOUT O Modulated clock output pin This pin becomes to“L” at power-down. 8 VDD P Power Supply Voltage Pin. Connect to +3.3V. * SSON Pin is available in ASM3P2187A Device and PDB Pin is available in ASM3P2187B Device Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 2 of 9 ASM3P2187A/B May 2008 rev 0.2 Modulation Enable Setting Table SSON Modulation L No Modulation H Modulation Power down Status Table PDB Status L Power Down Status H Operating Status Spread Range Selection Table SEL Deviation @ 15MHz L ± 0.50% H ± 1.00% Absolute Maximum Ratings Symbol Rating Unit -0.5 to +4.6 V Input Voltage pin with respect to Ground VSS-0.5 to VDD+0.5 V VOUT Output Voltage pin with respect to Ground VSS-0.5 to VDD+0.5 V TSTG Storage temperature -55 to +125 °C VDD VIN Parameter Supply Voltage pin with respect to Ground 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. Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 3 of 9 ASM3P2187A/B May 2008 rev 0.2 DC Electrical Characteristics Symbol Parameter Min Typ Max Unit VIL Input low voltage VSS – 0.3 0.8 V VIH Input high voltage 2.0 VDD+ 0.3 V IIL Input low current -50 µA IIH Input high current +50 µA VOL Output low voltage VSS 0.4 V VOH Output high voltage 2.4 VDD V For ModOUT, IOL = 4mA For REFOUT, IOL = 3mA For ModOUT, IOH = -4mA For REFOUT, IOH = -3mA ICC Dynamic supply current (Unloaded Outputs) 17 mA IDD Static supply current standby mode (CLKIN/XIN pulled LOW) 8 mA 3.3 3.6 V Power up time (first locked clock cycle after power up) 2 5 mS Clock output impedance 50 VDD tON ZOUT Operating voltage 3.3 Ω CIN Input Capacitance 7 pF CL Load Capacitance 15 pF AC Electrical Characteristics Symbol CLKIN/XIN CLKOUT Parameter Input Clock frequency Output Clock frequency Min Typ Max Unit MHz 12.5 15 20 REFOUT 12.5 15 20 ModOUT 50 60 80 32.4 MHz MF Modulation Frequency 39 52 KHz tLH* Output rise time ( Measured from 20% to 80% ) 2 2.5 nS tHL* Output fall time ( Measured from 80% to 20% ) 1.5 2 nS tJC Cycle to Cycle Jitter ±250 ±325 tJp Period Jitter (REFOUT) ±150 ±200 tD Output duty cycle 50 55 45 pS % *tLH and tHL are measured with a capacitive load of 15pF Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 4 of 9 ASM3P2187A/B May 2008 rev 0.2 Output Clock Duty Cycle tD = (tb / ta ) ta tb VDD/2 ModOUT, REFOUT Cycle –to- Cycle Jitter (tJC = [tn -tn + 1]) ModOUT tn tn+1 Note: Cycle-cycle jitter indicates the difference between a certain cycle and the immediately succeeding (or preceding) cycle Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 5 of 9 ASM3P2187A/B May 2008 rev 0.2 Typical Crystal Oscillator Circuit R1 = 510Ω C1 = 27 pF C2 =27 pF Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency 14.31818MHz Frequency tolerance ± 50 ppm or better at 25°C Operating temperature range -25°C to +85°C Storage temperature -40°C to +85°C Load capacitance 18pF Shunt capacitance 7pF maximum ESR 25Ω Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 6 of 9 ASM3P2187A/B May 2008 rev 0.2 Package Information Mechanical Package Outline 8-Pin TSSOP H E D A2 A C θ 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 θ 0° 8° 0° 8° Note: Controlling dimensions are millimeters TSSOP – 0.034 grams unit weight Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 7 of 9 ASM3P2187A/B May 2008 rev 0.2 Ordering Code Part Number Marking Package Type Temperature ASM3P2187AG-08TT 3P2187AG 8-Pin TSSOP, TUBE, Green Commercial ASM3P2187AG-08TR 3P2187AG 8-Pin TSSOP, TAPE & REEL, Green Commercial ASM3I2187AG-08TT 3I2187AG 8-Pin TSSOP, TUBE, Green Industrial ASM3I2187AG-08TR 3I2187AG 8-Pin TSSOP, TAPE & REEL, Green Industrial ASM3P2187BG-08TT 3P2187BG 8-Pin TSSOP, TUBE, Green Commercial ASM3P2187BG-08TR 3P2187BG 8-Pin TSSOP, TAPE & REEL, Green Commercial ASM3I2187BG-08TT 3I2187BG 8-Pin TSSOP, TUBE, Green Industrial ASM3I2187BG-08TR 3I2187BG 8-Pin TSSOP, TAPE & REEL, Green Industrial Device Ordering Information A S M 3 P 2 1 8 7 A G - 0 8 T R R = Tape & Reel, T = Tube or Tray O = SOT 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 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 = Clock Generator 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 PulseCore Semiconductor Mixed Signal Product Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 8 of 9 ASM3P2187A/B May 2008 rev 0.2 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright © PulseCore Semiconductor All Rights Reserved Part Number: ASM3P2187A/B Document Version: 0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 Many PulseCore Semiconductor products are protected by issued patents or by applications for patent © Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore’s Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore’s Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore 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 PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use. Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 9 of 9