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Exar Corporation

XRT83VSH314 Datasheet Preview

XRT83VSH314 Datasheet

14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

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XRT83VSH314
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
SEPTEMBER 2006
REV. 1.0.1
GENERAL DESCRIPTION
The XRT83VSH314 is a fully integrated 14-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 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).
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
Integrated Multi-Service Access Platforms (IMAPs)
Integrated Access Devices (IADs)
Inverse Multiplexing for ATM (IMA)
Wireless Base Stations
FIGURE 1. BLOCK DIAGRAM OF THE XRT83VSH314
TCLK_n
TPOS_n
TNEG_n
TxON
RPOS_n
RCLK_n
RNEG_n
ICT
TEST
ATP_TIP
ATP_RING
1 of 14 Channels
Driver
Monitor
HDB3/B8ZS
Encoder
Tx/Rx Jitter
Attenuator
Timing
Control
Tx Pulse
Shaper &
Pattern Gen
Remote
Loopback
Digital
Loopback
QRSS
Generation
& Detection
Line
Driver
Analog
Loopback
HDB3/B8ZS
Decoder
Tx/Rx Jitter
Attenuator
Clock & Data
Recovery
Peak
Detector
& Slicer
AIS & LOS
Detector
Test
Microprocessor
Interface
Programmable Master
Clock Synthesizer
DMO
TTIP_n
TRING_n
RTIP_n
RRING_n
RLOS
RCLKOUT
RxON
RxTSEL
8kHzOUT
MCLKE1out
MCLKT1out
MCLKE1Nout
MCLKT1Nout
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com




Exar Corporation

XRT83VSH314 Datasheet Preview

XRT83VSH314 Datasheet

14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

No Preview Available !

XRT83VSH314
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.1
FEATURES
Fully integrated 14-Channel short haul transceivers for T1/J1 (1.544MHz) and E1 (2.048MHz) applications
T1/E1/J1 short haul and clock rate are per port selectable through software without changing components
Internal Impedance matching on both receive and transmit for 75(E1), 100(T1), 110(J1), and 120
(E1) applications are per port selectable through software without changing components
Power down on a per channel basis with independent receive and transmit selection
Five pre-programmed transmit pulse settings for T1 short haul applications per channel
User programable Arbitrary Pulse mode
On-Chip transmit short-circuit protection and limiting protects line drivers from damage on a per channel
basis
Selectable Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive or transmit
path
Driver failure monitor output (DMO) alerts of possible system or external component problems
Transmit outputs and receive inputs may be "High" impedance for protection or redundancy applications on a
per channel basis
Support for automatic protection switching
1:1 and 1+1 protection without relays
Receive monitor mode handles 0 to 6dB resistive attenuation (flat loss) along with 0 to 6dB cable loss for
both T1 and E1
Loss of signal (RLOS) according to ITU-T G.775/ETS300233 (E1) and ANSI T1.403 (T1/J1)
Programmable data stream muting upon RLOS detection
On-Chip HDB3/B8ZS encoder/decoder with an internal 16-bit LCV counter for each channel
On-Chip digital clock recovery circuit for high input jitter tolerance
QRSS/PRBS pattern generator and detection for testing and monitoring
Error and bipolar violation insertion and detection
Transmit all ones (TAOS) Generators and Detectors
Supports local analog, remote, digital, and dual loopback modes
1.8V Digital Core
3.3V I/O and Analog Core
304-Pin BGA package
-40°C to +85°C Temperature Range
Supports gapped clocks for mapper/multiplexer applications
PRODUCT NUMBER
XRT83VSH314IB
PRODUCT ORDERING INFORMATION
PACKAGE TYPE
304 Lead PBGA
OPERATING TEMPERATURE RANGE
-40°C to +85°C
2


Part Number XRT83VSH314
Description 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
Maker Exar Corporation
Total Page 30 Pages
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