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| Preliminary Data Sheet PT7V2727/3727 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Product Features * * * * * * 3.3v/5.0v operating voltage Uses an inexpensive external crystal On-chip VCXO with pull range of 240ppm VCXO tuning voltage from 0 to 3.3V 10mA output driver at CMOS levels Available in SOIC package General Description The PT7V2727/3727 are low-cost, high-performance 3.3V/5.0v VCXO, designed to replace expensive VCXO modules. The on-chip voltage causes clocks to vary by 120ppm. They use an inexpensive external pullable crystal at 27MHz to produce the same output frequency. Applications Set-Top Box xDSL Ordering Information Ordering code PT7V2727W PT7V3727W Package type 8-Pin SOIC 8-Pin SOIC Operating Range Industrial Industrial Logic Block Diagram Pin Configuration X1 NC VIN GND 1 2 3 4 SOIC 8 package 8 X2 NC Vcc CLKOUT X1 Vcc VIN GND 1 2 3 4 SOIC 8 package 8 X2 GND NC CLKOUT PT7V2727 7 6 5 PT7V3727 7 6 5 Pin Description Pin Number 2727 3727 1, 8 1, 8 2, 7 6 3 3 4 4, 7 5 5 6 2 PT0173(05/04) 1 Pin Name X1, X2 NC VIN GND CLKOUT VCC Type I I PWR O PWR Description Crystal Connection, Connect to a pullable 27MHz crystal No Connect, Can be float or connected to VCC or GND Voltage Input to VCXO Ground Clock Output Power Supply +3.3v/5.0v Ver: 0 Preliminary Data Sheet PT7V2727/3727 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature....................-55oC to 125oC Ambient Temperature....................-40oC to 85oC Supply Voltage VCC .................... ... -0.5V to 7V Input Voltage........................-0.5V to VCC+0.5V Output Current .....................................10mA Soldering Lead Temperature(10s)................260oC Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC Electrical Characteristics (Unless otherwise specified, VCC = 3.3V, fO = 27MHz, VIN = 1.65V, Load = 15pF, TA = 25oC) Sym. VCC ICC IOH IOL RS * f CL Parameter Supply Voltage Supply Current High-level output voltage Low-level output voltage Negative Resistance Input Frequency Output Capacitance OE = 3.3V, CL = 15pF VOH = VCC-0.5V VOL = 0.5V VIN = 0V Test Condition Pin VCC VCC CLKOUT CLKOUT X1, X2 X1, X2 CLKOUT Min. 3.153 Typ. 3.3 5 Max. 3.465 Unit V mA 4 20 -11 12 -150 27 15 -4 mA MHz pF 30 30 * Note: only reference for design. AC Electrical Characteristics (Unless otherwise specified, fO = 27MHz, Load = 15pF, TA = 25oC) Sym. tr / tf Duty f tj Parameter Rise / Fall time Output clock duty cycle Output frequency pull range Cycle to cycle jitter Linearity Oscillator start time VIN from 0.1 to 0.9VCC Trigger at 0.9VCC Test Condition 0.1VCC to 0.9VCC At VCC/2 VIN from 0V to VCC Pin CLKOUT CLKOUT 45 Min. Typ. 1.5 50 120 50 10 1.5 10 Max. 6 55 Unit ns % ppm ps % ms PT0173(05/04) 2 Ver: 0 Preliminary Data Sheet PT7V2727/3727 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Recommended Crystal Specifications Description Mode of Oscillation Frequency Range Frequency Tolerance Temperature plus Aging Stability Operating Temperature C0/C1 Load Capacitance(CL) Equivalent Series Resistance(ESR) Crystal Fundamental 27.000MHz 30ppm 50ppm -20C to + 70C 240(max.) 18pF 35ohms(max.) PT0173(05/04) 3 Ver: 0 Preliminary Data Sheet PT7V2727/3727 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Plastic 8-pin SOIC (W) Package PT0173(05/04) 4 Ver: 0 Preliminary Data Sheet PT7V2727/3727 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Notes Pericom Technology Inc. Email: support@pti.com.cn China: Asia Pacific: U.S.A.: Web Site: www.pti.com.cn, www.pti-ic.com No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China Tel: (86)-21-6485 0576 Fax: (86)-21-6485 2181 Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong Tel: (852)-2243 3660 Fax: (852)- 2243 3667 3545 North First Street, San Jose, California 95134, USA Tel: (1)-408-435 0800 Fax: (1)-408-435 1100 Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom Technology Incorporation. PT0173(05/04) 5 Ver: 0 |
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