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| ASM3P2855D Custom Clock Generator for FAX System Features * * * * * * * Generates Custom Clocks for FAX system from an inexpensive 24MHz Crystal 3 x 50MHz synchronized clocks 5 x 54.8MHz synchronized clocks 1 x 19.52MHz clock for Scanner REFOUT Clock Supply Voltage 3.3 V 0.3V Available in 16L TSSOP, Green package Product Description ASM3P2855D is a custom clock generator for FAX system. ASM3P2855D realizes all the ten clocks required by the various components and subsystems of the FAX system. It uses an inexpensive 24MHz crystal as the input to generate five synchronized 54.8MHz clocks and three synchronized 50MHz PCI clocks that can be used by CPU, HDD, PCI Analyzer, ASIC2 and ASIC3, Ethernet, LAN PHY and for the CPU Timer, a 19.52MHz clock used by ASIC1 for Scanner. The custom clock generator ASM3P2855D works with a Supply Voltage of 3.3V 0.3V. The device is available in a 16L TSSOP Green package. Block Diagram VDD VDD_FOUT 19.52MHz XIN / CLKIN Crystal Oscillator XOUT 5 54.8MHz PLL 3 50MHz REFOUT GND GND_FOUT (c)2010 SCILLC. All rights reserved. MARCH 2010 - Rev. 1 Publication Order Number: ASM3P2855/D ASM3P2855D Pin Diagram CLKIN / XIN 1 XOUT VDD 2 3 16 15 14 13 19.52MHz 50MHz 50MHz 50MHz REFOUT 54.80MHz 54.80MHz 54.80MHz VDD_FOUT 4 GND_FOUT GND 54.80MHz 54.80MHz 5 6 7 8 ASM3P2855D 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 CLKIN / XIN XOUT VDD VDD_FOUT GND_FOUT GND 54.80MHz 54.80MHz 54.80MHz 54.80MHz 54.80MHz REFOUT 50MHz 50MHz 50MHz 19.52MHz Type I O P P P P O O O O O O O O O O Description Crystal connection or external reference Clock input. 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 Synchronous 54.80MHz Clock Output Synchronous 54.80MHz Clock Output Synchronous 54.80MHz Clock Output Synchronous 54.80MHz Clock Output Synchronous 54.80MHz Clock Output 24MHz Reference Clock Output Synchronous 50MHz Clock Output Synchronous 50MHz Clock Output Synchronous 50MHz Clock Output 19.52MHz Clock Output Rev. 1 | Page 2 of 7 | www.onsemi.com ASM3P2855D Absolute Maximum Ratings Symbol VDD, VDD_FOUT VIN TSTG Ts TJ TDV Parameter Rating -0.5 to +4.6 -0.5 to VDD+0.5 -65 to +125 260 150 2 Unit V C C C KV Power Supply Voltage relative to GND Input Voltage relative to GND (Input Pins) Storage temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (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. Recommended Operating Conditions Symbol TA VDD VDD_FOUT Parameter Operating Temperature Output Core Voltage Output Buffer Voltage Min 0 +3.0 +3.0 Typ +3.3 +3.3 Max +70 +3.6 +3.6 Units C V V DC Electrical Characteristics Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD VDD_FOUT tON ZO Input low voltage Input high voltage Input low current Input high current Parameter Min GND-0.3 2.0 Typ Max 0.8 VDD+0.3 -35 35 Unit V V A A mA mA 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 = 10mA) Output high voltage (VDD = 3.3V, IOH = -10mA) Static supply current Dynamic supply current ( VDD = 3.3V,Unloaded Outputs) Operating Core Voltage Operating Buffer Voltage Power-up time (first locked cycle after power-up) Output impedance 2 1 3 3 0.4 2.5 12 32 3.0 3.0 3.3 3.3 30 3.6 3.6 5 V V mA mA V V mS Notes: 1. CLKIN / XIN is pulled to GND. 2. VDD and CLKIN inputs are stable. Rev. 1 | Page 3 of 7 | www.onsemi.com ASM3P2855D AC Electrical Characteristics Symbol XIN / CLKIN Input frequency At Pin 12 FOUT Output frequency At Pins 7,8,9,10,11 At Pins 13,14,15 At Pin 16 1 tLH Parameter Min Typ 24 24 54.80 50 19.52 1.0 1.0 Max Unit MHz MHz Output rise time (measured from 20% to 80%) Output fall time (measured from 80% to 20%) Output duty cycle Period Jitter (Unloaded Outputs) 45 nS nS 55 275 % pS tHL 1 tD tJP 50 Note: 1. tLH and tHL are measured into a capacitive load of 15pF. Period Jitter Rev. 1 | Page 4 of 7 | www.onsemi.com ASM3P2855D Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance(CP) Shunt capacitance ESR 24MHz 50 ppm or better at 25 C -25 to +85 C C -40 to +85 C C 18pF 7pF maximum 25 Note: Note: CL is Load Capacitance and Rx is used to prevent oscillations at overtone frequency of the Fundamental frequency. Typical Crystal Interface Circuit R Crystal Rx CL CL CL = 2*(CP - CS), Where CP = Load capacitance of crystal CS = Stray capacitance due to CIN, PCB, Trace etc. Rev. 1 | Page 5 of 7 | www.onsemi.com ASM3P2855D Package Information 16-lead Thin Shrunk Small Outline Package (4.40-MM Body) 8 1 PIN 1 ID E H 9 16 A Seating Plane L C e D A1 B 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 Inches Max 0.043 0.006 0.041 0.012 0.008 0.201 0.177 0.026 BSC 0.252 BSC 0.030 8 0.50 0 0.05 0.80 0.19 0.09 4.90 4.30 D Dimensions A2 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 Rev. 1 | Page 6 of 7 | www.onsemi.com ASM3P2855D Ordering Code Ordering Code ASM3P2855DG-16TR Marking 3P28 55D Package Type 16-pin 4.4-mm TSSOP - TAPE & REEL, Green Operating Range 0 to +7 0 C C A "microdot" placed at the end of last row of marking or just below the last row toward the center of package indicates Pb-free. Licensed under U.S Patent #5,488,627 and #5,631,921. Note: This product utilizes US Patent #6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. U.S Patent Pending; Timing-Safe and Active Bead are trademarks of PulseCore Semiconductor, a wholly owned subsidiary of ON Semiconductor. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative |
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