 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| March 2007 rev 0.2 Custom Clock Generator for Fax System Features * * * * * Generates Custom Clocks for FAX system from an inexpensive 24MHz Crystal 2x 66.66MHz low EMI (Spread Spectrum) clocks for ASIC1 (System / DDR SDRAM) 1x 48MHz for USB1.1 HOST 2x 33.33MHz low EMI (Spread Spectrum) clocks for System / DDR SDRAM of ASIC2 and ASIC3 1x 25MHz low EMI (Spread Spectrum) clock for LCD, Serial port, and buzzer of ASIC1 * * * * * * ASM3P2854B 1x 12MHz for USB PHY (USB2.0) 1x Programmable clock for printer engine control One of the four programmable clock outputs selection through two Select Pins Supply Voltage 3.3V +/- 0.3V Available in 16L TSSOP, Green package Commercial Temperature operation Product Description ASM3P2854B is a part of the two chip custom clock generator solution for NEC FAX system. Together with ASM3P2855A, ASM3P2854B realizes all the seventeen clocks required by the various components and subsystems of the FAX system. It uses an inexpensive 24MHz crystal as the input to generate two 66.66MHz low EMI (spread spectrum) clocks used by ASIC1 for system / DDR SDRAM, two 33.33MHz low EMI (spread spectrum) clocks used by ASIC2 and ASIC3 for system / DDR SDRAM, a 25MHz low EMI (Spread Spectrum) clock used by ASIC1 for LCD, Serial port, and buzzer, a 48MHz clock used by USB1.1 HOST, and a 12MHz clock used by USB PHY clock used for (USB2.0). (PCLK) Printer One of the four of and is Programmable 24.00448MHz, 20.40464MHz frequencies 21.19962MHz Engine control 21.33732MHz, selectable through two Select pins S1 and S2. The accuracy of the synthesized programmable clocks is within +/- 18ppm. The custom clock generator works with a Supply Voltage for 3.3V. The device is available in a 16L TSSOP Green package, in commercial temperature range. The output Clocks have an accuracy of 50ppm. VDD_FOUT Block Diagram VDD 2 PLL 2 66.6MHz SSCLK 33.3MHz SSCLK 25MHz SSCLK XIN / CLKIN XOUT Crystal (24 MHz) PLL 48MHz 12MHz PLL S1 S2 PCLK GND 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. March 2007 rev 0.2 Pin Diagram ASM3P2854B XIN / CLKIN XOUT VDD VDD_FOUT GND_FOUT GND 48MHz 12MHz 1 2 3 4 5 6 7 8 16 15 14 25MHz SSCLK PCLK S2 66.6MHz SSCLK 66.6MHz SSCLK S1 33.3MHz SSCLK 33.3MHz SSCLK ASM3P2854B 13 12 11 10 9 Pin Description Pin# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name XIN / CLKIN XOUT VDD VDD_FOUT GND_FOUT GND 48MHz 12MHz 33.3MHz 33.3MHz S1 66.6MHz 66.6MHz S2 PCLK 25MHz Type I O P P P P O O O O I O O I O O Description 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. Crystal connection. If using an external reference, this pin must be left unconnected. Power supply for the core Power supply for the output buffers. Ground connection for the output buffers Ground connection 48MHz Clock Output 12MHz Clock Output 33.3 MHz low EMI Clock Output 33.3 MHz low EMI Clock Output Selection Bit for Programmable Clock .See the PCLK Selection Table for details 66.6 MHz low EMI Clock Output 66.6 MHz low EMI Clock Output Selection Bit for Programmable Clock .See the PCLK Selection Table for details Programmable Clock Output 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 March 2007 rev 0.2 PCLK Selection Table S2 0 0 1 1 S1 0 1 0 1 Programmable Clock (MHz) 24.00448 21.33732 21.19962 20.40464 ASM3P2854B Absolute Maximum Ratings Symbol VDD, VDD_FOUT TSTG Ts TJ TDV Parameter Voltage on any 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 -65 to +125 260 150 2 Unit 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. Recommended Operating Conditions Symbol TA VDD VDD_FOUT Parameter Operating Temperature Core Voltage Output Voltage Min 0 +3.0 +3.0 Typ +3.3 +3.3 Max +70 +3.6 +3.6 Units C V V Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 3 of 8 March 2007 rev 0.2 DC Electrical Characteristics Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD VDD_FOUT tON ZOUT * XIN pin is pulled low ASM3P2854B Parameter Input low voltage Input high voltage Input low current Input high current 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 = 15mA) Output high voltage (VDD = 3.3V, IOH = 15mA) Static supply current* Dynamic supply current ( VDD=3.3V, No Load) Operating Voltage Operating Voltage Power-up time (first locked cycle after power-up) Output impedance Min GND - 0.3 2.0 Typ Max 0.8 VDD + 0.3 -35 35 Unit V V A A mA mA 3 3 0.4 2.5 14 33 3.0 3.0 3.3 3.3 37 3.6 3.6 5 V V mA mA V V mS AC Electrical Characteristics Symbol XIN / CLKIN Input frequency At Pin 7 At Pin 8 FOUT Output frequency At Pins 9 and 10 At Pins 12 and 13 At Pin 15* At Pin 16 Output Frequency = 25MHz fd tLH** tHL ** tJC tD Frequency Deviation Output Frequency = 33.3MHz Output Frequency = 66.6MHz Output rise time (measured from 0.8 to 2.0V) Output fall time (measured at 2.0V to 0.8V) Jitter (Cycle to cycle) Output duty cycle 45 Parameter Min Typ 24 48 12 33 66 PCLK 25 -0.45 -0.6 -1.2 1.0 1.0 250 50 Max Unit MHz % 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 March 2007 rev 0.2 Typical Crystal Oscillator Circuit ASM3P2854B Crystal R1 = 510 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 24 MHz 50 ppm or better at 25C -25C to +85C -40C to +85C 18pF 7pF maximum 25 Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 5 of 8 March 2007 rev 0.2 Package Information 16-lead Thin Shrunk Small Outline Package (4.40-MM Body) ASM3P2854B 8 1 PIN 1 ID E H 9 16 A Seating Plane L C e D A2 B A1 Dimensions Symbol Min A A1 A2 B C D E e H L 0.020 0 0.002 0.031 0.007 0.004 0.193 0.169 0.026 BSC 0.252 BSC 0.030 8 0.50 0 Inches Max 0.043 0.006 0.041 0.012 0.008 0.201 0.177 0.05 0.80 0.19 0.09 4.90 4.30 D Millimeters Min Max 1.20 0.15 1.05 0.30 0.20 5.10 4.50 0.65 BSC 6.40 BSC 0.75 8 Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 6 of 8 March 2007 rev 0.2 Ordering Codes Ordering Code ASM3P2854BG-16-TT ASM3P2854BG-16-TR ASM3P2854B Marking 3P2854BG 3P2854BG Package Type 16-pin 4.4-mm TSSOP - TUBE, Green 16-pin 4.4-mm TSSOP - TAPE & REEL, Green Temperature Commercial Commercial ASM3P2854BG-16TR 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 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 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 Custom Clock Generator for Fax System Notice: The information in this document is subject to change without notice. 7 of 8 March 2007 rev 0.2 ASM3P2854B PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright (c) PulseCore Semiconductor All Rights Reserved Preliminary Information Part Number: ASM3P2854B Document Version: V0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCoree Semiconductor, dated 11-11-2003 (c) Copyright 2007 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 |
Price & Availability of ASM3P2854B
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |