GENERAL DESCRIPTION
The XRT8000 is a dual phase-locked loop chip that generates two simultaneous, very low jitter, output clocks for synchronization applications in wide area networking systems. The outputs are phase locked to the input signal. The chip has four basic modes of operation; referred to as master (FORWARD, REVERSE) and slave (FORWARD, REVERSE) modes (See Figure 1).

FEATURES
● Clock Adaptation for Most Popular Telecommunication Frequencies
● Wide Input Frequency Range
● Programmable Output Frequencies
● Less than 0.05UI Wide Band Output Jitter
● Low Power Operation (5V and 3.3V)
● Maximum Lock Time of 45mS
● Cascadable
● No External Components Needed
● Lock Detect Indication Pin

APPLICATIONS
● DSU’s, CSU’s and Access Equipment
● ISDN Terminals
● Concentrators and Multiplexers