DESCRIPTION

The NE/SE564 is a versatile, high guaranteed frequency phase-locked loop designed for operation up to 50MHz. As shown in the Block Diagram, the NE/SE564 consists of a VCO, limiter, phase comparator, and post detection processor.

FEATURES

•Operation with single 5V supply

•TTL-compatible inputs and outputs

•Guaranteed operation to 50MHz

•External loop gain control

•Reduced carrier feedthrough

•No elaborate filtering needed in FSK applications

•Can be used as a modulator

•Variable loop gain (externally controlled)

APPLICATIONS

•High speed modems

•FSK receivers and transmitters

•Frequency Synthesizers