The DS21349 is a fully integrated Line Interface Unit (LIU) for long-haul or short-haul T1 applications over twisted-pair installations. It interfaces to two twisted-pair lines—one pair for transmit and one pair for receive through an appropriate network interface. The device can be configured for control through software or hardware mode. It provides a precise, crystal-less jitter attenuator that can be placed in either the transmit or receive path.
The DS21349 is a fully integrated Line Interface Unit (LIU) designed for long-haul or short-haul T1 applications over twisted-pair installations. It interfaces to two twisted-pair lines—one for transmit and one for receive through an appropriate network interface. The device can be configured for control through software or hardware mode.
| Supply Voltage | 3.3V |
|---|---|
| Extended Operating Temperature Range | -40°C to +85°C |
| Package Type | 28 PLCC |
| Receive Sensitivity | 0dB to -36dB |
| Line Build-Out Settings | Five Line Build-Out Settings |
| CSU Filters | Four CSU Filters from 0dB to -22.5dB |
The device supports both hardware mode and serial port mode for control.
The device can operate on 0.63mm (22 AWG) cables up to 6k feet in length.
Receive sensitivity can be limited to -18dB, -26dB, or -36dB.