General Description
The ICS1887 is designed to provide high performance clock recovery and generation for 125 MHz serial data streams. The ICS1887 is ideally suited for LAN transceiver applications in either FDDI or Fast Ethernet environments. The ICS1887 converts NRZ to/from NRZI data in addition to providing a 5-bit parallel digital data transmit and receive interface.

Features
• Single IC solution to existing designs requiring multiple devices
• Data and clock recovery for 125 MBaud FDDI or Fast Ethernet applications
• Clock multiplication from either a crystal, differential or single-ended timing source
• Continuous clock in the absence of data
• No external PLL components
• Lock/Loss status indicator output
• Loopback mode for system diagnostics
• Selectable loop timing mode
• PECL driver with settable sink current
• Parallel digital transmit and receive data interface
• NRZ to/from NRZI data conversion
• Consult ICS for optional configurations and data rates