ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Low Power EMI Reduction IC Features • FCC approved method of EMI attenuation • Provides up to 15dB EMI reduction • Generates a 1x, 2x and 4x low EMI spread spectrum clock of the input frequency • 1x: ASM3P2811A/B • 2x: ASM3P2812A/B • 4x: ASM3P2814A/B • Optimized for input frequency range from 10MHz to 40 MHz • Internal loop filter minimizes external components and board space • Selectable spread options: • Down Spread and Center Spread • 8 frequency deviation selections: • ±0.625% to -3.5% • Low inherent Cycle-to-Cycle Jitter • 3.3V Operating Voltage • CMOS/TTL compatible inputs and outputs. • Pin-out compatible with Cypress CY25811, CY25812 and CY25814 • Commercial and Industrial temperature range • Available in 8-pin SOIC and TSSOP Packages and Center Spread, and percentage deviation range from ±0.625% to -3.5%. The ASM3P28XX reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P28XX allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding, and other passive components that are traditionally required to pass EMI regulations. The ASM3P28XX 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’. The ASM3P28XX uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. Product Description Applications The ASM3P28XX devices are versatile spread spectrum The ASM3P28XX is targeted towards EMI management frequency modulators designed specifically for a wide for memory and LVDS interfaces in mobile graphic range of input clock frequencies from 10MHz to 40MHz. chipsets and high-speed digital applications such as PC Refer Input / Output Frequency Range Selection Table. peripheral devices, consumer electronics, and embedded The ASM3P28XX can generate an EMI reduced clock controller systems. from crystal, ceramic resonator, or system clock. The ASM3P28XX-A and the ASM3P28XX-B offer various combinations of spread options and percentage deviations. Refer Frequency Deviation and Spread Selection Table. These combinations include Down 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. ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Block Diagram VDD D_C SRS FRS PLL Modulation XIN /CLKIN Crystal Oscillator Frequency Divider XOUT Feedback Divide Phase Detector Loop Filter VCO Output Divider ModOUT VSS Pin Configuration XIN / CLKIN 1 VSS 2 D_C 3 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B SRS 4 8 XOUT 7 VDD 6 FRS 5 ModOUT Pin Description Pin# Pin Name Type Description 1 XIN / CLKIN I Crystal connection or external Clock input. 2 VSS P Ground to entire chip. 3 D_C I 4 SRS I 5 ModOUT O Spread spectrum clock output Digital logic input used to select Down (LOW) or Center (HIGH) spread options. (Refer Frequency Deviation and Spread Selection Table). This pin has an internal pull-up resistor. Spread range select. Digital logic input used to select frequency deviation (Refer Frequency Deviation and Spread Selection Table). This pin has an internal pull-up resistor. 6 FRS I Frequency range select. Digital logic input used to select Input frequency range (Refer Input/Output Frequency Range Selection Table). This pin has an internal pull-up resistor. 7 VDD P Power supply for the entire chip. 8 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Input/Output Frequency Range Selection Table Part Number FRS (pin 6) ASM3P2811 (1x) ASM3P2812 (2x) Modulation Rate ASM3P2814 (4x) Input (MHz) Output (MHz) Input (MHz) Output (MHz) Input (MHz) Output (MHz) 0 10-20 10-20 10-20 20-40 10-20 40-80 Input Frequency / 448 1 20-40 20-40 20-40 40-80 20-40 80-160 Input Frequency / 896 Output Frequency Deviation and Spread Selection Table Part Number ASM3P28XXA ASM3P28XXB D_C (pin 3) Frequency Deviation* (%) SRS (pin 4) FS=0 FS=1 10/20/40 (MHz) 20/40/80 (MHz) 20/40/80 (MHz) 40/80/160 (MHz) 0 0 -3 -2.5 -2.7 -2.6 0 1 -3.7 -3.4 -3.8 -3.6 1 0 ±1.5 ±1.2 ±1.5 ±1.3 1 1 ±1.8 ±1.6 ±1.9 ±1.8 0 0 -1.7 -1.0 -1.5 -1.4 0 1 -2.0 -1.5 -2.0 -1.9 1 0 ±0.75 ±0.6 ±0.8 ±0.7 1 1 ±1.0 ±0.75 ±1.0 ±0.9 Note: Frequency Deviation given in the table is for the Output Frequency Range covering ASM3P2811x / 12x / 14x Absolute Maximum Ratings Symbol Parameter VDD, VIN TSTG Rating Unit Voltage on any pin with respect to Ground -0.5 to +4.6 V Storage temperature -65 to +125 °C Ts Max. Soldering Temperature (10 sec) 260 °C TJ Junction Temperature 150 °C 2 KV TDV Static Discharge Voltage (As per JEDEC STD 22- 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. Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Operating Conditions Symbol Min Max Unit Voltage on any pin with respect to GND 3.0 3.6 V TA Operating temperature -40 +85 °C CL Load Capacitance 10 pF CIN Input Capacitance 7 pF Max Unit VSS – 0.3 0.8 V 2 VDD + 0.3 V -50 µA 50 µA 3 mA 3 mA 0.4 V VDD Parameter DC Electrical Characteristics Symbol Parameter VIL Input low voltage VIH Input high voltage Input low current (Inputs D_C, SRS and FRS are pulled high internally) IIL IIH IXOL IXOH XOUT Output low current (VXOL@ 0.4V, VDD = 3.3V) XOUT Output high current (VXOH@ 2.5V, VDD = 3.3V) Output low voltage (VDD = 3.3V, IOL = 5mA) VOH Output high voltage (VDD = 3.3V, IOH = -5mA) ICC Dynamic supply current (Unloaded Output) IDD Static supply current , Standby mode (CLKIN pulled to GND) tON ZOUT Typ Input high current VOL VDD Min Operating voltage 2.5 V 8 3.0 3.3 Power up time (first locked clock cycle after power up) Clock out impedance 18 mA 4.5 mA 3.6 V 500 µS 76 Ω AC Electrical Characteristics Symbol fIN Parameter Min Typ Max Unit Input frequency for ASM3P2811/12/13/14 A/B 10 40 MHz Output frequency for ASM3P2811A/B 10 40 MHz Output frequency for ASM3P2812A/B 20 80 MHz Output frequency for ASM3P2814A/B 40 160 MHz tLH* Output rise time (measured at 0.8V to 2.0V) 0.5 0.9 1.2 nS tHL* Output fall time (measured at 2.0V to 0.8V) 0.8 1.0 1.3 nS tJC Cycle to Cycle Jitter (Unloaded Output) tD Output duty cycle fOUT ±250 45 50 pS 55 * tLH and tHL are measured into a capacitive load of 10pF Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 11 % ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Package Information 8-Pin SOIC Package H E D A2 A C A1 D θ e L B Dimensions Symbol Inches Min Max Millimeters Min Max A1 0.004 0.010 0.10 0.25 A 0.053 0.069 1.35 1.75 A2 0.049 0.059 1.25 1.50 B 0.012 0.020 0.31 0.51 C 0.007 0.010 0.18 0.25 D 0.193 BSC 4.90 BSC E 0.154 BSC 3.91 BSC e 0.050 BSC 1.27 BSC H 0.236 BSC 6.00 BSC L 0.016 0.050 0.41 1.27 θ 0° 8° 0° 8° Note: Controlling dimensions are millimeters. SOIC: 0.074 grams unit weight. Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 8-Pin TSSOP Package 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: 0.0325 grams unit weight. Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Ordering Codes Part Number Marking Package Type Temperature ASM3P2811AF-08SR 3P2811AFS SOIC – Tape & Reel, Pb free Commercial ASM3P2811AF-08ST 3P2811AFS SOIC – Tube, Pb free Commercial ASM3P2811AF-08TR 3P2811AFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2811AF-08TT 3P2811AFT TSSOP – Tube, Pb free Commercial ASM3P2811BF-08SR 3P2811BFS SOIC – Tape & Reel, Pb free Commercial ASM3P2811BF-08ST 3P2811BFS SOIC – Tube, Pb free Commercial ASM3P2811BF-08TR 3P2811BFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2811BF-08TT 3P2811BFT TSSOP – Tube, Pb free Commercial ASM3P2812AF-08SR 3P2812AFS SOIC – Tape & Reel, Pb free Commercial ASM3P2812AF-08ST 3P2812AFS SOIC – Tube, Pb free Commercial ASM3P2812AF-08TR 3P2812AFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2812AF-08TT 3P2812AFT TSSOP – Tube, Pb free Commercial ASM3P2812BF-08SR 3P2812BFS SOIC – Tape & Reel, Pb free Commercial ASM3P2812BF-08ST 3P2812BFS SOIC – Tube, Pb free Commercial ASM3P2812BF-08TR 3P2812BFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2812BF-08TT 3P2812BFT TSSOP – Tube, Pb free Commercial ASM3P2814AF-08SR 3P2814AFS SOIC – Tape & Reel, Pb free Commercial ASM3P2814AF-08ST 3P2814AFS SOIC – Tube, Pb free Commercial ASM3P2814AF-08TR 3P2814AFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2814AF-08TT 3P2814AFT TSSOP – Tube, Pb free Commercial ASM3P2814BF-08SR 3P2814BFS SOIC – Tape & Reel, Pb free Commercial ASM3P2814BF-08ST 3P2814BFS SOIC – Tube, Pb free Commercial ASM3P2814BF-08TR 3P2814BFT TSSOP – Tape & Reel, Pb free Commercial ASM3P2814BF-08TT 3P2814BFT TSSOP – Tube, Pb free Commercial ASM3I2811AF-08SR 3I2811AFS SOIC – Tape & Reel, Pb free Industrial ASM3I2811AF-08ST 3I2811AFS SOIC – Tube, Pb free Industrial ASM3I2811AF-08TR 3I2811AFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2811AF-08TT 3I2811AFT TSSOP – Tube, Pb free Industrial ASM3I2811BF-08SR 3I2811BFS SOIC – Tape & Reel, Pb free Industrial ASM3I2811BF-08ST 3I2811BFS SOIC – Tube, Pb free Industrial ASM3I2811BF-08TR 3I2811BFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2811BF-08TT 3I2811BFT TSSOP – Tube, Pb free Industrial ASM3I2812AF-08SR 3I2812AFS SOIC – Tape & Reel, Pb free Industrial ASM3I2812AF-08ST 3I2812AFS SOIC – Tube, Pb free Industrial ASM3I2812AF-08TR 3I2812AFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2812AF-08TT 3I2812AFT TSSOP – Tube, Pb free Industrial ASM3I2812BF-08SR 3I2812BFS SOIC – Tape & Reel, Pb free Industrial Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Ordering Codes (cont’d) Part Number Marking Package Type Temperature ASM3I2812BF-08ST 3I2812BFS SOIC - Tube, Pb free Industrial ASM3I2812BF-08TR 3I2812BFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2812BF-08TT 3I2812BFT TSSOP – Tube, Pb free Industrial ASM3I2814AF-08SR 3I2814AFS SOIC - Tape & Reel, Pb free Industrial ASM3I2814AF-08ST 3I2814AFS SOIC - Tube, Pb free Industrial ASM3I2814AF-08TR 3I2814AFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2814AF-08TT 3I2814AFT TSSOP – Tube, Pb free Industrial ASM3I2814BF-08SR 3I2814BFS SOIC - Tape & Reel, Pb free Industrial ASM3I2814BF-08ST 3I2814BFS SOIC - Tube, Pb free Industrial ASM3I2814BF-08TR 3I2814BFT TSSOP – Tape & Reel, Pb free Industrial ASM3I2814BF-08TT 3I2814BFT TSSOP – Tube, Pb free Industrial ASM3P2811AG-08SR 3P2811AGS SOIC – Tape & Reel, Green Commercial ASM3P2811AG-08ST 3P2811AGS SOIC – Tube, Green Commercial ASM3P2811AG-08TR 3P2811AGT TSSOP – Tape & Reel, Green Commercial ASM3P2811AG-08TT 3P2811AGT TSSOP – Tube, Green Commercial ASM3P2811BG-08SR 3P2811BGS SOIC – Tape & Reel, Green Commercial ASM3P2811BG-08ST 3P2811BGS SOIC – Tube, Green Commercial ASM3P2811BG-08TR 3P2811BGT TSSOP – Tape & Reel, Green Commercial ASM3P2811BG-08TT 3P2811BGT TSSOP – Tube, Green Commercial ASM3P2812AG-08SR 3P2812AGS SOIC – Tape & Reel, Green Commercial ASM3P2812AG-08ST 3P2812AGS SOIC – Tube, Green Commercial ASM3P2812AG-08TR 3P2812AGT TSSOP – Tape & Reel, Green Commercial ASM3P2812AG-08TT 3P2812AGT TSSOP – Tube, Green Commercial ASM3P2812BG-08SR 3P2812BGS SOIC – Tape & Reel, Green Commercial ASM3P2812BG-08ST 3P2812BGS SOIC – Tube, Green Commercial ASM3P2812BG-08TR 3P2812BGT TSSOP – Tape & Reel, Green Commercial ASM3P2812BG-08TT 3P2812BGT TSSOP – Tube, Green Commercial ASM3P2814AG-08SR 3P2814AGS SOIC – Tape & Reel, Green Commercial ASM3P2814AG-08ST 3P2814AGS SOIC – Tube, Green Commercial ASM3P2814AG-08TR 3P2814AGT TSSOP – Tape & Reel, Green Commercial ASM3P2814AG-08TT 3P2814AGT TSSOP – Tube, Green Commercial ASM3P2814BG-08SR 3P2814BGS SOIC – Tape & Reel, Green Commercial ASM3P2814BG-08ST 3P2814BGS SOIC – Tube, Green Commercial ASM3P2814BG-08TR 3P2814BGT TSSOP – Tape & Reel, Green Commercial ASM3P2814BG-08TT 3P2814BGT TSSOP – Tube, Green Commercial ASM3I2811AG-08SR 3I2811AGS SOIC – Tape & Reel, Green Industrial ASM3I2811AG-08ST 3I2811AGS SOIC – Tube, Green Industrial Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 8 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Ordering Codes (cont’d) Part Number Marking Package Type Temperature ASM3I2811AG-08TR 3I2811AGT TSSOP – Tape & Reel, Green Industrial ASM3I2811AG-08TT 3I2811AGT TSSOP – Tube, Green Industrial ASM3I2811BG-08SR 3I2811BGS SOIC – Tape & Reel, Green Industrial ASM3I2811BG-08ST 3I2811BGS SOIC – Tube, Green Industrial ASM3I2811BG-08TR 3I2811BGT TSSOP – Tape & Reel, Green Industrial ASM3I2811BG-08TT 3I2811BGT TSSOP – Tube, Green Industrial ASM3I2812AG-08SR 3I2812AGS SOIC – Tape & Reel, Green Industrial ASM3I2812AG-08ST 3I2812AGS SOIC – Tube, Green Industrial ASM3I2812AG-08TR 3I2812AGT TSSOP – Tape & Reel, Green Industrial ASM3I2812AG-08TT 3I2812AGT TSSOP – Tube, Green Industrial ASM3I2812BG-08SR 3I2812BGS SOIC – Tape & Reel, Green Industrial ASM3I2812BG-08ST 3I2812BGS SOIC - Tube, Green Industrial ASM3I2812BG-08TR 3I2812BGT TSSOP – Tape & Reel, Green Industrial ASM3I2812BG-08TT 3I2812BGT TSSOP – Tube, Green Industrial ASM3I2814AG-08SR 3I2814AGS SOIC - Tape & Reel, Green Industrial ASM3I2814AG-08ST 3I2814AGS SOIC - Tube, Green Industrial ASM3I2814AG-08TR 3I2814AGT TSSOP – Tape & Reel, Green Industrial ASM3I2814AG-08TT 3I2814AGT TSSOP – Tube, Green Industrial ASM3I2814BG-08SR 3I2814BGS SOIC - Tape & Reel, Green Industrial ASM3I2814BG-08ST 3I2814BGS SOIC - Tube, Green Industrial ASM3I2814BG-08TR 3I2814BGT TSSOP – Tape & Reel, Green Industrial ASM3I2814BG-08TT 3I2814BGT TSSOP – Tube, Green Industrial Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 9 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 Device Ordering Information A S M 3 P 2 8 1 1 A G - 0 8 S 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 C=TDFN (2X2) COL 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 US patent #5,488,627, #6,646,463 and #5,631,920 Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 10 of 11 ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B April 2008 rev 1.6 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 Numbers: ASM3P2811A/B ASM3P2812A/B ASM3P2814A/B Document Version: 1.6 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. Low Power EMI Reduction IC Notice: The information in this document is subject to change without notice. 11 of 11