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| Preliminary Data Sheet PT7V4027 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Product Features * * * * * * * 3.3V operating voltage Uses an inexpensive external crystal Provide clock output enable 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 PT7V4027 is a low-cost, high-performance 3.3V VCXO, designed to replace expensive VCXO modules. The on-chip voltage causes clocks to vary by 120ppm. It uses an inexpensive external pullable crystal at 27MHz to produce the same output frequency. Applications Set-Top Box xDSL Ordering Information Ordering code PT7V4027W Package type 8-Pin SOIC Operating Range Industrial Logic Block Diagram OE Pin Configuration X1 NC VIN GND 1 2 3 4 SOIC 8 package 8 X2 OE Vcc CLKOUT PT7V4027 7 6 5 Pin Description Pin Number 1, 8 2 3 4 5 6 7 PT0147(05/04) 1 Pin Name X1, X2 NC VIN GND CLKOUT VCC OE Type I I PWR O PWR I 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 Output Enable. High or floating enables output. Internal pull-up. Ver: 0 Preliminary Data Sheet PT7V4027 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. VDD IDD IDDS VIH VIL IOH IOL IOZ RS * f CL Parameter Supply Voltage Supply Current Supply Current Input Logic High Input Logic Low High-level output voltage Low-level output voltage Output Leakage Current Negative Resistance Input Frequency Output Capacitance VOH = VDD-0.5V VOL = 0.5V OE = 0V VIN = 0V OE = 3.3V, CL = 15pF OE = 0V Test Condition Pin VDD VDD VDD OE OE CLKOUT CLKOUT CLKOUT X1, X2 X1, X2 CLKOUT Min. 3.153 Typ. 3.3 5 0.33 Max. 3.465 Unit V mA 1 V 0.8 -4 10 V mA A MHz pF 2.0 -11 12 -150 27 15 4 20 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 PT0147(05/04) 2 Ver: 0 Preliminary Data Sheet PT7V4027 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.) PT0147(05/04) 3 Ver: 0 Preliminary Data Sheet PT7V4027 VCXO ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Plastic 8-pin SOIC (W) Package PT0147(05/04) 4 Ver: 0 Preliminary Data Sheet PT7V4027 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. PT0147(05/04) 5 Ver: 0 |
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