XRT83VSH316_15 Datasheet, PDF (1/98 Pages) Exar Corporation – 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

XRT83VSH316
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
MARCH 2015
REV. 1.0.2
GENERAL DESCRIPTION
The XRT83VSH316 is a fully integrated 16-channel
short-haul line interface unit (LIU) that operates from
a 1.8V Inner Core and 3.3V I/O power supplies.
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 parallel
microprocessor interface or SPI (Serial Mode).
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).
Additional features include System Side LOS, AIS,
QRSS/PRBS and Line Side RLOS, AIS, QRSS/
PRBS, DMO with 16-bit LCV counters and diagnostic
loopback modes for each channel.
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
 Integrated Multi-Service Access Platforms (IMAPs)
 Integrated Access Devices (IADs)
 Inverse Multiplexing for ATM (IMA)
 Wireless Base Stations
FIGURE 1. BLOCK DIAGRAM OF THE XRT83VSH316
RCLK
RPOS
RNEG/ LCV
TCLK
TPOS
TNEG
SLOS
Channel N of16
B8ZS/ HDB3
Decoder
PRBS
System Generator
SAIS, SLOS, SPRBS
Line Detector
AIS, RLOS,
LCV
MUX
32- bit/ 64- bit
Jitter Attenuator
Clock & Data
Recovery( CDR)
Peak Detector
& Slicer
Line Generator
PRBS
System Detector
SAIS, SLOS, SPRBS
Digital
Loop Back
Remote
Loop Back
Analog
Loop Back
DMO
B8ZS/ HDB3
Encoder
32- bit/ 64- bit
Jitter Attenuator
Timing
Control
Tx Pulse Shaper
Line Driver
AIS
RTIP
RRING
RLOS
RxON
RxTSEL
DMO
TTIP
TRING
TxON
JTAG
Test
Parallel
Microprocessor
SPI
Microprocessor
PLL
MCLKnOUT
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com