XRT75L03D

RECEIVER:
` On chip Clock and Data Recovery circuit for high input jitter tolerance
` Meets E3/DS3/STS-1 Jitter Tolerance Requirement
` Detects and Clears LOS as per G.775
` Receiver Monitor mode handles up to 20 dB flat loss with 6 dB cable attenuation
` On chip B3ZS/HDB3 encoder and decoder that can be either enabled or disabled
` On-chip clock synthesizer provides the appropriate rate clock from a single 12.288 MHz Clock
` Provides low jitter output clock

TRANSMITTER:
` Compliant with Bellcore GR-499, GR-253 and ANSI T1.102 Specification for transmit pulse
` Tri-state Transmit output capability for redundancy applications
` Each Transmitter can be turned on or off
` Transmitters provide Current Drive Output JITTER ATTENUATOR:
` On chip advanced crystal-less Jitter Attenuator for each channel
` Jitter Attenuator can be selected in Receive or Transmit paths
` Meets ETSI TBR 24 Jitter Transfer Requirements
` Compliant with jitter transfer template outlined in ITU G.751, G.752, G.755 and GR-499-CORE,1995 standards
` Jitter Attenuator can be disabled

CONTROL AND DIAGNOSTICS:
` 5 wire Serial Microprocessor Interface for control and configuration
` Supports optional internal Transmit driver monitoring
` Hardware Mode for control and configuration
` Each channel supports Local, Remote and Digital Loop-backs
` Single 3.3 V ± 5% power supply
` 5 V Tolerant I/O
` Available in 128 pin Thermally enhanced LQFP Package
` - 40 to 85 Industrial Temperature Range

The XRT75L03D is a three-channel fully integrated Line Interface Unit (LIU) with Jitter Attenuator for E3/ DS3/STS-1 applications. It incorporates 3 independent Receivers, Transmitters and Jitter Attenuators in a single 128 pin LQFP package. Each channel of the XRT75L03D can be independently configured to operate in the data rate, E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz).

Each transmitter can be turned off and tristated for redundancy support or for conserving power. The XRT75L03D's differential receiver provides high noise interference margin and is able to receive the data over 1000 feet of cable or with up to 12 dB of cable attenuation.

The XRT75L03D incorporates an advanced crystalless jitter attenuator per channel that can be selected either in the transmit or receive path. The jitter attenuator performance meets the ETSI TBR-24 and Bellcore GR-499 specifications.

The XRT75L03D provides both Serial Microprocessor Interface as well as Hardware mode for programming and control.

The XRT75L03D supports local, remote and digital loop-backs. The device also has a built-in Pseudo Random Binary Sequence (PRBS) generator and detector with the ability to insert and detect single bit error for diagnostic purposes.