14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
www.DataSheet4U.com
MAY 2006
XRT83SH314
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.3
GENERAL DESCRIPT...
Description
www.DataSheet4U.com
MAY 2006
XRT83SH314
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.3
GENERAL DESCRIPTION
The XRT83SH314 is a fully integrated 14-channel short-haul line interface unit (LIU) that operates from a single 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in T1, E1, or J1 mode independently on a per channel basis with minimum external components. The LIU features are programmed through a standard microprocessor interface. EXAR’s LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be high impedance when experiencing a power failure or when the LIU is powered off. Key design features within the LIU optimize 1:1 or 1+1 redundancy and non-intrusive monitoring applications to ensure reliability without using relays. The on-chip clock synthesizer generates T1/E1/J1 clock rates from a selectable external clock frequency and has five output clock references that can be used for external timing (8kHz, 1.544Mhz, 2.048Mhz, nxT1/J1, nxE1). FIGURE 1. BLOCK DIAGRAM OF THE XRT83SH314
Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS/PRBS generation/detection, TAOS, DMO, and diagnostic loopback modes. APPLICATIONS
T1 Digital Cross Connects (DSX-1) ISDN Primary Rate Interface CSU/DSU E1/T1/J1 Interface T1/E1/J1 LAN/WAN Routers Public Switching Systems and PBX Interfaces T1/E1/J1 Multiplexer and Channel Banks Integr...
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