PDF CF5034 Data sheet ( Hoja de datos )

Número de pieza	CF5034
Descripción	350MHz PECL-output Oscillator ICs
Fabricantes	Nippon Precision Circuits
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No Preview Available ! CF5034 series 350MHz PECL-output Oscillator ICs OVERVIEW The CF5034 series are differential LVPECL output oscillator ICs. They are made using a BiCMOS process which allows high-frequency oscillator circuits and differential LVPECL output circuits to be fabricated on a www.DataSheet4U.csoimngle chip. Two oscillator modes are supported—350MHz maximum fundamental oscillation mode, and 80MHz to 160MHz 3rd overtone oscillation mode. The CF5034 series devices require only the connection of a crystal to realize a differential LVPECL output oscillator circuit. FEATURES I 3.3 ± 0.3V operating supply voltage I Oscillator frequency range • 80MHz to 350MHz fundamental oscillation mode • 80MHz to 160MHz 3rd overtone oscillation mode I 40MHz to 350MHz output frequency range I Differential LVPECL output I fO (oscillator frequency) or fO/2 output frequency, determined by internal connection I 50 ± 5% output duty (measured at output crossing point) I Standby function: outputs are high impedance when OE is LOW. I Power-saving pull-up resistor built-in (pin OE) I Chip form (CF5034××) SERIES LINEUP Version Oscillation mode Recommended oscillator frequency [MHz]1 Output frequency CF5034AA CF5034AB CF5034BA CF5034BB CF5034DA CF5034DB CF5034LA CF5034LB CF5034MA CF5034MB Fundamental – Fundamental or 3rd overtone 250 to 350 160 to 250 80 to 350 (external capacitors required) 125 to 160 80 to 125 fO fO/2 fO fO/2 fO fO/2 fO fO/2 fO fO/2 1. The recommended oscillator frequency criteria is based on the negative resistance characteristics and cutoff frequency. Note that this may change depending on the crystal characteristics, thus sufﬁcient allowance should be made. ORDERING INFORMATION Device CF5034××−1 Package Chip form NIPPON PRECISION CIRCUITS INC.—1 1 page CF5034 series FUNCTIONAL DESCRIPTION Standby Function When OE goes LOW, the oscillator stops and the output pins (OUT, OUTN) become high impedance. OE HIGH (or open) LOW OUT, OUTN Either fO or fO/2 High impedance Oscillator Normal operation Stopped www.DataSheet4U.com MEASUREMENT CIRCUITS Measurement Circuit 1 Power-saving Pull-up Resistor The OE pin pull-up resistance changes in value in response to the input level (HIGH or LOW). When OE is LOW (standby state), the pull-up resistance increases, thereby decreasing the current consump- tion. Measurement Circuit 3 A IEE1, IEE2 Signal Generator R1 VCC C1 XIN OE VCC2 OUT R1 OUTN GND R1 VT VOE VCC XIN XOUT VCC2 OUT R1 OUTN GND R1 VT XIN input signal 500mVp-p, sine wave C1: 0.001µF R1: 50Ω VT: VCC − 2V VOE: VCC, VIH, VIL Measurement Circuit 2 VCC VCC2 A OUT A 0.7VCC OE OUTN GND A R1: 50Ω, VT: VCC − 2V Measurement Circuit 4 VCC XIN VCC2 OUT R1 XOUT OUTN TEST GND R1 VT R1: 50Ω, VT: VCC − 2V XOUT = HIGH: OUT pin is ﬁxed HIGH (VOH). OUTN pin is ﬁxed LOW (VOL). XOUT = LOW: OUT pin is ﬁxed LOW (VOL). OUTN pin is ﬁxed HIGH (VOH). NIPPON PRECISION CIRCUITS INC.—5 5 Page

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