XRT8001 Datasheet PDF - Exar Corporation

GENERAL DESCRIPTION
The XRT8001 WAN Clock is a dual-phase-locked loop chip that generates two very low jitter output clock signals that can be used for synchronization clocks in wide area networking systems. The XRT8001 has preprogrammed multipliers and dividers that are selected via the serial port. It generates two integer multiples of 8kHz, 56kHz, and 64kHz while locked onto an incoming reference of 1.54MHz (T1), 2.048MHz (E1), 8kHz, 56kHz, or 64kHz

FEATURES
• Dual Phased Locked Loops with Pre-Programmed Multipliers and Dividers
• Pre-Programmed with Popular Frequency Conversions for Communications Systems
• Generates Output Clock Frequencies Ranging From 8kHz up to 16.384MHz
• Serial Port Control for Optimal Performance
• Sync Output: 8kHz or 64kHz
• Low Jitter
• Cascadable (Master / Slave Modes)
• No External Components Needed
• Pin Compatible with the XRT8000
• Low Power (3.3V or 5V): 40 - 100mW
• - 40°C to +85°C Temperature Range
• 18-Lead PDIP or SOIC Packages

APPLICATIONS
• T1/E1 Access Equipment (DSU/CSU)
• Frame Relay Access Devices (FRAD)
• Basic Rate and Primary Rate ISDN Equipment
    • ISDN Routers
    • Terminals
• Remote Access Servers
• T1/E1 Concentrators
• T1/E1 Multiplexers
• T1/E1 Clock Rate Converters
• Internal Timing Generators
• System Synchronizers