8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
www.DataSheet4U.com
MARCH 2007
XRT83VSH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.7
GENERAL DESCRIP...
Description
www.DataSheet4U.com
MARCH 2007
XRT83VSH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.7
GENERAL DESCRIPTION
The XRT83VSH38 is a fully integrated 8-channel short-haul line interface unit (LIU) that operates from a 1.8V and a 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in T1, E1, or J1 mode with minimum external components. The LIU features are programmed through a standard parallel or serial 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 outputs a clock reference of the line rate chosen. Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS 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
FIGURE 1. BLOCK DIAGRAM OF THE XRT83VSH38 T1/E1/J1 LIU (HOST MODE)
MCLKE1 MCLKT1
MASTER CLOCK SYNTHESIZER
MCLKOUT
1 of 8 channels, CH...
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