ASM3P2854B August 2007 rev 0.3 Custom Clock Generator for Fax System Features • • Generates Custom Clocks for FAX system from 1x 25MHz low EMI (Spread Spectrum) clock for LCD, Serial port, and buzzer of ASIC1 an inexpensive 24MHz Crystal 2x 66.66MHz low EMI (Spread Spectrum) clocks • 1x 12MHz for USB PHY (USB2.0) for ASIC1 (System / DDR SDRAM) • 1x Programmable clock for printer engine control • 1 x 48MHz for USB1.1 HOST • • 2 x 33.33MHz low EMI (Spread Spectrum) • One of the four programmable clock outputs selection through two Select Pins clocks for System / DDR SDRAM of ASIC2 and • Supply Voltage 3.3V +/- 0.3V ASIC3 • Available in 16L TSSOP, Green package • Commercial Temperature operation Product Description ASM3P2854B is a part of the two chip custom clock 48MHz clock used by USB1.1 HOST, and a 12MHz clock generator solution for NEC FAX system. Together with used ASM3P2855A, ASM3P2854B realizes all the seventeen Programmable by USB PHY (USB2.0). clock (PCLK) the four frequencies of of and 24.00448MHz, subsystems of the FAX system. It uses an inexpensive 20.40464MHz 24MHz crystal as the input to generate two 66.66MHz low selectable through EMI (spread spectrum) clocks used by ASIC1 for system accuracy of the synthesized programmable clocks is / DDR SDRAM, two 33.33MHz low EMI (spread within +/- 18ppm. The custom clock generator works with spectrum) clocks used by ASIC2 and ASIC3 for system / a Supply Voltage for 3.3V. The device is available in a DDR SDRAM, a 25MHz low EMI (Spread Spectrum) 16L TSSOP Green package, in commercial temperature clock used by ASIC1 for LCD, Serial port, and buzzer, a range. The output Clocks have an accuracy of ±50ppm. clocks required by the various components Block Diagram 21.33732MHz, One used for Printer 21.19962MHz Engine 2 PLL 2 66.6MHz SSCLK 33.3MHz SSCLK 25MHz SSCLK XIN / CLKIN XOUT 48MHz Crystal (24 MHz) PLL 12MHz PLL PCLK S1 S2 GND is two Select pins S1 and S2. The VDD_FOUT VDD and control GND_FOUT 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. ASM3P2854B August 2007 rev 0.3 Pin Diagram XIN / CLKIN 1 16 25MHz SSCLK XOUT 2 15 PCLK VDD 3 14 S2 VDD_FOUT 4 13 66.6MHz SSCLK GND_FOUT 5 12 66.6MHz SSCLK GND 6 11 S1 48MHz 7 10 33.3MHz SSCLK 12MHz 8 9 33.3MHz SSCLK ASM3P2854B Pin Description Pin# Pin Name Type Description 1 XIN / CLKIN I 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. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 VDD P Power supply for the core 4 VDD_FOUT P Power supply for the output buffers. 5 GND_FOUT P Ground connection for the output buffers 6 GND P Ground connection 7 48MHz O 48MHz Clock Output 8 12MHz O 12MHz Clock Output 9 33.3MHz O 33.3 MHz low EMI Clock Output 10 33.3MHz O 33.3 MHz low EMI Clock Output 11 S1 I Selection Bit for Programmable Clock .See the PCLK Selection Table for details 12 66.6MHz O 66.6 MHz low EMI Clock Output 13 66.6MHz O 66.6 MHz low EMI Clock Output 14 S2 I Selection Bit for Programmable Clock .See the PCLK Selection Table for details 15 PCLK O Programmable Clock Output 16 25MHz O 25 MHz low EMI Clock Output Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 2 of 8 ASM3P2854B August 2007 rev 0.3 PCLK Selection Table S2 S1 Programmable Clock (MHz) 0 0 24.00448 0 1 21.33732 1 0 21.19962 1 1 20.40464 Absolute Maximum Ratings Symbol Parameter VDD, VDD_FOUT 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 TDV Static Discharge Voltage (As per JEDEC STD22- A114-B) 2 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. Recommended Operating Conditions Symbol TA VDD VDD_FOUT Parameter Operating Temperature Min Typ Max Units +70 °C Core Voltage +3.0 0 +3.3 +3.6 V Output Voltage +3.0 +3.3 +3.6 V Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 3 of 8 ASM3P2854B August 2007 rev 0.3 DC Electrical Characteristics Symbol Parameter Min Typ Max Unit VIL Input low voltage GND - 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 IXOL XOUT output low current ([email protected], VDD=3.3V) 3 mA IXOH XOUT output high current ([email protected], VDD=3.3V) 3 mA VOL Output low voltage (VDD = 3.3V, IOL = 15mA) 0.4 2.5 V VOH Output high voltage (VDD = 3.3V, IOH = 15mA) IDD Static supply current* 14 mA V ICC Dynamic supply current ( VDD=3.3V, No Load) 33 mA VDD Operating Voltage 3.0 3.3 3.6 V VDD_FOUT Operating Voltage 3.0 3.3 3.6 V 5 mS tON ZOUT Power-up time (first locked cycle after power-up) Output impedance 37 Ω * XIN pin is pulled low AC Electrical Characteristics Symbol XIN / CLKIN FOUT Parameter Min Input frequency Output frequency Frequency Deviation Max Unit 24 At Pin 7 48 At Pin 8 12 At Pins 9 and 10 33 At Pins 12 and 13 66 At Pin 15* PCLK At Pin 16 25 Output Frequency = 25MHz fd Typ MHz -0.45 Output Frequency = 33.3MHz -0.6 Output Frequency = 66.6MHz -1.2 tLH** Output rise time (measured from 0.8 to 2.0V) 1.0 tHL ** Output fall time (measured at 2.0V to 0.8V) 1.0 tJC Jitter (Cycle to cycle) 250 tD Output duty cycle 45 50 % nS pS 55 % * See the PCLK Selection Table for PCLK Frequency ** tLH and tHL are measured into a capacitive load of 15pF Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 4 of 8 ASM3P2854B August 2007 rev 0.3 Typical Crystal Oscillator Circuit Crystal C1 = 27 pF R1 = 510Ω C2 = 27 pF Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency 24 MHz 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 25 Ω Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 5 of 8 ASM3P2854B August 2007 rev 0.3 Package Information 16-lead Thin Shrunk Small Outline Package (4.40-MM Body) 1 8 PIN 1 ID E 16 A A2 e B A1 Seating Plane C θ D 9 H L D Dimensions Symbol Inches Min Millimeters Max A Min Max 0.043 1.20 A1 0.002 0.006 0.05 0.15 A2 0.031 0.041 0.80 1.05 B 0.007 0.012 0.19 0.30 C 0.004 0.008 0.09 0.20 D 0.193 0.201 4.90 5.10 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 0.030 0.50 0.75 θ 0° 8° 0° 8° Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 6 of 8 ASM3P2854B August 2007 rev 0.3 Ordering Codes Ordering Code Marking Package Type Temperature ASM3P2854BG-16TT 3P2854BG 16-pin 4.4-mm TSSOP - TUBE, Green Commercial ASM3P2854BG-16TR 3P2854BG 16-pin 4.4-mm TSSOP - TAPE & REEL, Green Commercial A S M 3 P 2 8 5 4 B G - 1 6 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 DEVICE 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 Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 7 of 8 ASM3P2854B August 2007 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: ASM3P2854B Document Version: 0.3 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCoree 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. Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 8 of 8