NE564 - Phase-locked Loop
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.
PIN CONFIGURATIONS D, N Packages V+ LOOP GAIN CONTROL INPUT TO PHASE C
NE564 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
