The DS3151 (single), DS3152 (dual), DS3153 (triple), and DS3154 (quad) line interface units (LIUs) perform the functions necessary for interfacing at the physical layer to DS3, E3, or STS-1 lines. Each LIU has independent receive and transmit paths and a built-in jitter attenuator. Applications * Access Concentrators * ATM and Frame Relay Equipment * Digital Cross-Connects * DSLAMs * PBXs * Routers/Switches * SONET/SDH and PDH Multiplexers * Test Equipment * Single, Dual, Triple, or Quad Integrated Transmitter, Receiver, and Jitter Attenuators for DS3, E3, and STS-1 * Each Port Independently Configurable * Perform Receive Clock/Data Recovery and Transmit Waveshaping * Hardware or CPU Bus Configuration Options * Jitter Attenuators can be Placed in Either the Receive or Transmit Paths * Interface to 75Ω Coaxial Cable at Lengths Up to 380m (DS3), 440m (E3), or 360m (STS-1) * Use 1:2 Transformers on Tx and Rx * Require Minimal External Components * Local and Remote Loopbacks * Low-Power 3.3V Operation (5V Tolerant I/O) * Industrial Temperature Range: -40°C to +85°C * Small Package: 144-Pin, 13mm x 13mm Thermally Enhanced CSBGA * IEEE 1149.1 JTAG Support