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XRT83L314

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

Exar Corporation 

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

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