Overview

The TE3-LIU™ PEF 3452 Line Interface Unit is used to connect a DS3/STS-1 or E3 framer device to an analog transmission line. The line interface fulfills the relevant standards for DS3 (44.736 Mbit/s), STS-1 (51.840 Mbit/s) and E3 (34.368 Mbit/s) systems.

The TE3-LIU™ comes in a P-MQFP-44-2 package (SMD) to save a significant amount of board space. The integrated jitter attenuation further reduces overall system complexity and cost.

Features

• Generic analog interface for all DS3/STS-1/E3 applications

• Single chip solution for receive and transmit direction

• 3.3 V low power device

• Integrated receive equalization network

• Integrated noise and crosstalk filter

• Clock and data recovery using an integrated PLL with ultra-low intrinsic jitter

• Transmit clock duty cycle correction PLL

• No external components required for clock and data recovery and receive equalizer

• DSX receive line monitor (additional 20 dB gain according to ANSI T1.102)

• Low transmitter output impedances for high transmit return loss

• Disable function of the analog transmit line outputs

• Transmit pulse shaper to fulfill requirements of ANSI T1.404, Telcordia GR-499-CORE, ANSI T1.102 and ITU-T G.703 (E3)

• Maximum line length up to 1100 ft. (using standard coaxial cable, for example AT&T 728A, 734A or 734D)

• External line length selection (LBO) is not required

• Jitter specifications of GR-499-CORE and ITU-T G.823 are met

• Integrated jitter attenuation PLL and buffer in transmit direction

• Dual or single rail digital inputs and outputs from/to the framer interface

• Selectable line codes (HDB3 (E3), B3ZS (DS3/STS-1), AMI)

• Analog and digital loss of signal detection and indication

• Automatic RDOP/RDON blanking option in case of LOS

• Bipolar violation indication

• Local loop and remote loop for diagnostic purposes

• Insertion of alarm indication signal (all ones)

• Flexible hardware or software controlled device configuration

• Device power down function

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