MC145149 synthesizer equivalent, dual pll frequency synthesizer.
A logic high selects the latches for PLL 1. A logic low selects PLL 2. The second
–to
–last bit controls the appropriate port expander outp.
of any voltage higher than maximum rated voltages to this high
–impedance circuit. For proper operation, .
INPUT PINS OSCin, OSCout Reference Oscillator Input/Output (Pins 15, 16) These pins form a reference oscillator when connected to terminals of an external parallel
–resonant crystal. Frequency
–setting capacitors of app.
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