Frequency Synthesiser with non-resettable counters

The NJ88C24 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counter, 7-bit programmable ‘A’ counter and the necessary control and latch circuitry for accepting and latching the input data.

FEATURES

■ Low Power Consumption

■ High Performance Sample and Hold Phase Detector

■ Serial Input with Fast Update Feature

■ >20MHz Input Frequency

■ Fast Lock-up Time