ASM3P2598A October 2006 rev 0.3 Low Power Peak EMI Reducing Solution Features • The ASM3P2598A uses the most efficient and optimized modulation profile approved by the FCC and is Generates a 1X low EMI optimized clock signal at the implemented by using a proprietary all digital method. output. • Integrated loop filter components. • Operates with a 3.3 / 2.5V Supply. • Operating current less than 5mA. • Low power CMOS design. • Input frequency range The ASM3P2598A 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 60MHz to 120MHz for 2.5V by oscillators and most frequency generators. Lowering 60MHz to 120MHz for 3.3V • EMI by increasing a signal’s bandwidth is called ‘spread Frequency deviation: ±1.5(Typ) @85MHz Output spectrum clock generation’. frequency. • Available in 6-pin TSOT-23 Package. Applications Product Description The ASM3P2598A is targeted towards all portable devices with very low power requirements like MP3 The ASM3P2598A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2598A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of all clock dependent signals. The ASM3P2598A allows significant players,MFP, LCD Panel Module and digital still cameras. Key Specifications Description Specification system cost savings by reducing the number of circuit Supply voltages VDD = 3.3V / 2.5V board layers ferrite beads, shielding that are traditionally Cycle-to-Cycle Jitter 360pS (Typ) required to pass EMI regulations. Output Duty Cycle 45/55% Modulation Rate Equation FIN/2560 ±1.5% (Typ) @85MHz Output Frequency Deviation Block Diagram VDD SSON PLL Modulation CLKIN Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider 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. ModOUT ASM3P2598A October 2006 rev 0.3 Pin Configuration (6-pin TSOT- 23 Package) SSON 1 NC 2 ASM3P2598A CLKIN 3 6 VSS 5 ModOUT 4 VDD Pin Description Pin# Pin Name Type Description 1 SSON I When SSON is HIGH, the spread spectrum is enabled and when LOW, it turns off the spread spectrum. Connect the pin to ground When Spread Spectrum feature is not required. 2 NC - No Connect 3 CLKIN I Clock Input 4 VDD P Power supply for the entire chip. 5 ModOUT O Spread spectrum clock output. 6 VSS P Ground connection. Modulation Profile Specifications Description Frequency Range Specification For 2.5V Supply For 3.3V Supply 60MHz < CLKIN < 120MHz 60MHz < CLKIN < 120MHz Modulation Equation FIN/2560 Frequency Deviation ±1.5% (Typ) @ 85MHz Output Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 2 of 7 ASM3P2598A October 2006 rev 0.3 Absolute Maximum Ratings Symbol Parameter Rating Unit VDD, VIN Voltage on any pin with respect to Ground -0.5 to +4.6 V Storage temperature -65 to +125 °C TA Operating temperature -40 to +85 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C 2 KV TSTG Static Discharge Voltage TDV (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 Symbol 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 – – -35 µA µA IIH Parameter Input high current – – 35 VOL Output low voltage (VDD = 2.5V, IOL = 8 mA) – – 0.6 V VOH Output high voltage (VDD = 2.5V, IOH = 8 mA) 1.8 – – V IDD Static supply current* – 1.8 – mA ICC Dynamic supply current (2.5V, 85MHz and no load) – 4.0 – mA VDD Operating voltage tON ZOUT 2.375 2.5 2.625 V Power-up time (first locked cycle after power-up) – – 5 mS Output impedance – 50 – Ω * CLKIN pin is pulled low AC Electrical Characteristics for 2.5V Supply Symbol CLKIN ModOUT fd Parameter Min Typ Max Unit Input frequency 60 – 120 MHz Output frequency 60 – 120 MHz Input Frequency = 60MHz – ±1.6 – Input Frequency = 120MHz – ±1.1 – Frequency Deviation % tLH* Output rise time (measured from 0.7V to 1.7V) 0.7 1.8 2.6 nS tHL* Output fall time (measured from 1.7V to 0.7V) 0.4 0.9 1.1 nS tJC Jitter (Cycle to cycle) – 360 – pS tD Output duty cycle 45 50 55 % * 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. 3 of 7 ASM3P2598A October 2006 rev 0.3 DC Electrical Characteristics for 3.3V Supply Symbol Min Typ Max Unit VIL Input low voltage Parameter VSS - 0.3 – 0.8 V VIH Input high voltage 2.0 – VDD + 0.3 V IIL Input low current – – -35 µA IIH Input high current – – 35 µA VOL Output low voltage (VDD = 3.3V, IOL = 8 mA) – – 0.4 V VOH Output high voltage (VDD = 3.3V, IOH = 8 mA) 2.5 – – V IDD Static supply current* – 2.2 – mA ICC Dynamic supply current (3.3V, 85MHz and no load) – 4.5 – mA VDD tON ZOUT Operating voltage 3.0 3.3 3.6 V Power-up time (first locked cycle after power-up) – – 5 mS Output impedance – 45 – Ω * CLKIN pin is pulled low AC Electrical Characteristics for 3.3V Supply Symbol CLKIN ModOUT fd Parameter Min Typ Max Unit Input frequency 60 – 120 MHz Output frequency 60 – 120 MHz Input Frequency = 60MHz – ±1.6 – Input Frequency = 120MHz – ±1.1 – Frequency Deviation % tLH* Output rise time (measured from 0.8 to 2.0V) 0.5 1.2 1.8 nS tHL * Output fall time (measured at 2.0V to 0.8V) 0.3 0.8 1.1 nS tJC Jitter (cycle to cycle) – 360 – pS tD Output duty cycle 45 50 55 % *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 7 ASM3P2598A October 2006 rev 0.3 Package Information 6-pin TSOT-23 Package Dimensions Symbol Inches Min A Max Millimeters 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 θ 0° 4° 0° 4° Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 5 of 7 ASM3P2598A October 2006 rev 0.3 Ordering Information Marking Package Type Temperature ASM3P2598AF-06-OR Part Number A11 6-Pin TSOT-23, TAPE & REEL, Pb Free Commercial ASM3P2598AG-06-OR A12 6-Pin TSOT-23, TAPE & REEL, Green Commercial ASM3I2598AF-06-OR A14 6-Pin TSOT-23, TAPE & REEL, Pb Free Industrial ASM3I2598AG-06-OR A15 6-Pin TSOT-23, TAPE & REEL, Green Industrial Device Ordering Information A S M 3 P 2 5 9 8 A G - 0 6 - 0 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 PulseCore 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. 6 of 7 ASM3P2598A October 2006 rev 0.3 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 Preliminary Information Part Number: ASM3P2598A Document Version: 0.3 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © 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. Low Power Peak EMI Reducing Solution Notice: The information in this document is subject to change without notice. 7 of 7