GENERAL DESCRIPTION
The DS21448DK is an easy-to-use evaluation board for the DS21448 quad E1/T1/J1 LIU. It is intended to be used as a daughter card with the DK101 motherboard or the DK2000 motherboard. A surfacemounted DS21448 and careful layout of the analog signal traces provide maximum signal integrity to demonstrate the transmit and receive capabilities of the DS21448. The DK101/DK2000 motherboard and Dallas’ ChipView software give point-and-click access to configuration and status registers from a Windows®-based PC. On-board LEDs indicate interrupt status and receive-carrier loss for all four ports. The evaluation board provides both RJ45 and BNC connectors for the line-side transmit and receive differential pairs on all four ports.

FEATURES
■ Demonstrates Key Functions of the DS21448 Quad LIU
■ Includes Transformers, BNC, and RJ45 Network Connectors and Termination Passives
■ Compatible with DK101 and DK2000 Demo Kit Motherboards
■ DK101/DK2000 and ChipView Software Provide Point-and-Click Access to the DS21448 Register Set
■ Memory-Mapped FPGA Provides Flexible Clock and Signal Routing
■ LEDs for Receive-Carrier Loss and Interrupt
■ Easy-to-Read Silk-Screen Labels Identify the Signals Associated with All Connectors, Jumpers, and LEDs