XRT83L314 Datasheet, PDF (2/84 Pages) Exar Corporation – 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT

XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
FEATURES
• Fully integrated 14-Channel short haul and long
haul transceivers for T1/J1 (1.544MHz) and E1
(2.048MHz) applications.
• T1/E1/J1 short haul, long haul, and clock rate are
per port selectable through software without
changing components.
• Receive monitor mode handles 0 to 29dB resistive
attenuation (flat loss) along with 0 to 6dB cable loss
for both T1 and E1.
• Receiver line attenuation indication output in 1dB
steps.
• Loss of signal (RLOS) according to ITU-T G.775/
ETS300233 (E1) and ANSI T1.403 (T1/J1).
• Internal Impedance matching on both receive and
transmit for 75Ω (E1), 100Ω (T1), 110Ω (J1), and
120Ω (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.
• Arbitrary pulse generator for T1 and E1 modes.
• Programmable receive slicer threshold (45%, 50%,
55%, or 68%) for improved receiver interference
immunity.
• 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.
• Transmit line build outs (LBO) for T1 long haul
applications from 0dB to -22.5dB in three -7.5dB
steps on a per channel basis.
• On-Chip transmit short-circuit protection and
limiting protects line drivers from damage on a per
channel basis.
• Independent Crystal-Less digital jitter attenuators
(JA) with 32-Bit or 64-Bit FIFO for the receive and
transmit paths
• On-Chip frequency multiplier generates T1 or E1
master clocks from a variety of external clock
sources (8, 16, 56, 64, 128, 256kHz and 1X, 2X,
4X, 8X T1 or E1)
• 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.
• Selectable receiver sensitivity from 0 to 36dB cable
loss in T1 @ 772kHz, and 0 to 43dB cable loss in
E1 @ 1,024kHz.
• QRSS pattern generator and detection for testing
and monitoring.
• Error and bipolar violation insertion and detection.
• Transmit all ones (TAOS) and in-band network loop
up and loop down code generation.
• Automatic loop code detection for remote loopback
activation.
• Supports local analog, remote, digital, and dual
loopback modes.
• Low Power dissipation: 170mW per channel (50%
density).
• 250mW per channel maximum power dissipation
(100% density).
• Single 3.3V supply operation (3V to 5V I/O
tolerant).
• 304-Pin TBGA package
• -40°C to +85°C Temperature Range
• Supports gapped clocks for mapper/multiplexer
applications.
PRODUCT ORDERING INFORMATION
PRODUCT NUMBER
XRT83L314IB
PACKAGE TYPE
304 Lead TBGA
OPERATING TEMPERATURE RANGE
-40°C to +85°C
2