Nippon Precision Circuits CF5034
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 single chip. The CF5034 series devices require only the connection of a crystal to realize a differential LVPECL output oscillator circuit.FEATURES
I I I I 3.3 ± 0.3V operating supply voltage Oscillator frequency range● 80MHz to 350MHz fundamental oscillation mode
● 80MHz to 160MHz 3rd overtone oscillation mode 40MHz to 350MHz output frequency range Differential LVPECL output I I I I I fO (oscillator frequency) or fO/2 output frequency, determined by internal connection 50 ± 5% output duty (measured at output crossing point) Standby function: outputs are high impedance when OE is LOW. Power-saving pull-up resistor built-in (pin OE) Chip form (CF5034××) SERIES LINEUP Version CF5034AA 250 to 350 CF5034AB Fundamental CF5034BA 160 to 250 CF5034BB CF5034DA – CF5034DB CF5034LA 125 to 160 CF5034LB CF5034MA CF5034MB Fundamental or 3rd overtone 80 to 125 80 to 350 (external capacitors required) Oscillation mode Recommended oscillator frequency [MHz]1 Output frequency 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.