DESCRIPTION

· The TP3406 is a monolithic transceiver for data transmission on twisted pair subscriber loops.
· Built on National's double poly microCMOS process, it operates on a single 5V supply.
· Uses Alternate Mark Inversion (AMI) line coding for low error rates and reduced EMI.
· Supports full-duplex transmission at 144 kb/s on a single twisted wire pair using burst-mode technique.
· Functions as an ISDN 'U' Interface for short loop applications, typically in PBX environments.
· Provides transmission for 2 B channels and 1 D channel with a range up to 800 meters on Ý24 cable.
· System timing is Master/Slave configured, with the line card end as the Master.
· On-chip timing sequences for loop activation and de-activation.

FEATURES

· Complete ISDN PBX 2-Wire Data Transceiver.
· 2 B plus D channel interface for PBX U Interface.
· 144 kb/s full-duplex on 1 twisted pair using Burst Mode.
· Loop range up to 800 meters (Ý24AWG).
· Alternate Mark Inversion coding with transmit filter and scrambler.
· Adaptive line equalizer and on-chip timing recovery.
· Standard TDM interface for B channels and separate interface for D channel.
· 2.048 MHz master clock and driver for line transformer.
· 4 loop-back test modes and MICROWIRE™ compatible serial control interface.

APPLICATIONS

· PBX Line Cards.
· Terminals.
· Regenerators.