The DP8459 Data Synchronizer is an integrated phase locked loop circuit which has been designed for application in magnetic hard disk, flexible (floppy) disk, optical disk, and tape drive memory systems for data re-synchronization and clock recovery with any standard recording code, operating to 25 Mb/s. The DP8459 is provided in a 28-pin PCC package. Zero phase start is employed during both data and reference clock lock sequences for rapid acquisition. An optional