ASM3P2187A_1

May 2008 rev 0.2 ASM3P2187A/B Spread Spectrum Clock Generator for Mobile Applications Features • Generates a 4X EMI optimized clock signal at the Product Description 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 electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of dependent signals. The ASM3P2187A/B all clock allows Output. • Input frequency • Output frequency : 50MHz to 80MHz • SSON/PDB option • Selectable Centre Spread : ± 0.5%, ± 1.0% • Low power CMOS design • Supply Voltage : 3.3V ± 0.3V • Industrial Temperature range • 8-pin TSSOP Package • Drop-in replacement for MB88155-412 Device significant system cost savings by reducing the number of circuit board layers ferrite beads, shielding that are traditionally required to pass EMI regulations. ASM3P2187A device has an option of Spread ON/OFF and ASM3P2187B device has Powerdown option Application The ASM3P2187A/B is targeted towards mobile phones, mobile audio players and PDAs. Block Diagram SEL SSON/PDB VDD 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. May 2008 rev 0.2 Pin Configurations ASM3P2187A/B CLKIN/ XIN 1 8 7 VDD ModOUT VSS REFOUT XOUT 2 ASM3P2187A SSON 3 6 5 SEL 4 CLKIN/ XIN 1 XOUT 2 ASM3P2187B PDB 3 8 7 6 5 VDD ModOUT VSS REFOUT SEL 4 Pin Description Pin# 1 2 3 4 Pin Name CLKIN/XIN XOUT SSON / PDB* SEL Type I O I I Description External reference Clock input or Crystal connection. Crystal connection. If using an external reference, this pin must be left unconnected. Modulation enable pin/ Power down pin. Has an Internal pull up resistor 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 6 7 8 REFOUT VSS ModOUT VDD O P O P Non-modulated clock output pin. The Frequency is same as input frequency. This pin becomes to “L” at power-down. Ground Connection. Connect to system ground. Modulated clock output pin This pin becomes to“L” at power-down. 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 May 2008 rev 0.2 Modulation Enable Setting Table SSON L H ASM3P2187A/B Modulation No Modulation Modulation Power down Status Table PDB L H Status Power Down Status Operating Status Spread Range Selection Table SEL L Deviation @ 15MHz ± 0.50% H ± 1.00% Absolute Maximum Ratings Symbol VDD VIN VOUT TSTG Ts TJ TDV Parameter Supply Voltage pin with respect to Ground Input Voltage pin with respect to Ground Output Voltage pin with respect to Ground Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B) Rating -0.5 to +4.6 VSS-0.5 to VDD+0.5 VSS-0.5 to VDD+0.5 -55 to +125 260 150 2 Unit V V V °C °C °C KV 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 May 2008 rev 0.2 DC Electrical Characteristics Symbol VIL VIH IIL IIH VOL VOH ICC IDD VDD tON ZOUT CIN CL Input low voltage Input high voltage Input low current Input high current Output low voltage Output high voltage For ModOUT, IOL = 4mA For REFOUT, IOL = 3mA For ModOUT, IOH = -4mA For REFOUT, IOH = -3mA VSS 2.4 ASM3P2187A/B Parameter Min VSS – 0.3 2.0 Typ Max 0.8 VDD+ 0.3 -50 +50 0.4 VDD 17 8 Unit V V µA µA V V mA mA V mS Ω Dynamic supply current (Unloaded Outputs) Static supply current standby mode (CLKIN/XIN pulled LOW) Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance Input Capacitance Load Capacitance 3.3 3.3 2 50 3.6 5 7 15 pF pF AC Electrical Characteristics Symbol CLKIN/XIN CLKOUT MF tLH* tHL* tJC tJp tD Output Clock frequency Modulation Frequency Output rise time ( Measured from 20% to 80% ) Output fall time ( Measured from 80% to 20% ) Cycle to Cycle Jitter Period Jitter (REFOUT) Output duty cycle 45 Parameter Input Clock frequency REFOUT ModOUT Min 12.5 12.5 50 32.4 Typ 15 15 60 39 2 1.5 ±250 ±150 50 Max 20 20 80 52 2.5 2 ±325 ±200 55 Unit MHz MHz KHz nS nS 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 May 2008 rev 0.2 Output Clock Duty Cycle tD = (tb / ta ) ASM3P2187A/B 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 May 2008 rev 0.2 Typical Crystal Oscillator Circuit ASM3P2187A/B 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 14.31818MHz ± 50 ppm or better at 25°C -25°C to +85°C -40°C to +85°C 18pF 7pF maximum 25Ω Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice. 6 of 9 May 2008 rev 0.2 Package Information ASM3P2187A/B Mechanical Package Outline 8-Pin TSSOP 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° 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 May 2008 rev 0.2 Ordering Code Part Number ASM3P2187AG-08TT ASM3P2187AG-08TR ASM3I2187AG-08TT ASM3I2187AG-08TR ASM3P2187BG-08TT ASM3P2187BG-08TR ASM3I2187BG-08TT ASM3I2187BG-08TR ASM3P2187A/B Marking 3P2187AG 3P2187AG 3I2187AG 3I2187AG 3P2187BG 3P2187BG 3I2187BG 3I2187BG Package Type 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green 8-Pin TSSOP, TUBE, Green 8-Pin TSSOP, TAPE & REEL, Green Temperature Commercial Commercial Industrial Industrial Commercial Commercial Industrial Industrial Device Ordering Information ASM3P2187AG-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, 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 U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 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 May 2008 rev 0.2 ASM3P2187A/B 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