XRT79L72 Datasheet (Exar Corporation) - 2-CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L72, 2-CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

4 MICROPROCESSOR INTERFACE 4 TEST AND DIAGNOSTIC 6 GENERAL PURPOSE INPUT AND OUTPUT PINS 7 TRANSMIT SYSTEM SIDE INTERFACE PINS 7 RECEIVE SYSTEM SIDE INTERFACE PINS 24 TRANSMIT LINE SIDE SIGNALS 39 RECEIVE LINE SIDE SIGNALS 41 ELECTRICAL CHARACTERISTICS 46 TABLE 1: DC ELECTRICAL CHARACTERISTICSS 46

www.DataSheet4U.com xr FEBRUARY 2005 PRELIMINARY XRT79L72 REV.

P1.0.2 2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC HARDWARE MANUAL The XRT79L72 is a two channel, ATM UNI/PPP Physical Layer Processor with integrated DS3/E3 framing controllers and Line Interface Units with Jitter Attenuators that are designed to support ATM direct mapping and cell delineation as well as PPP mapping and Frame processing.

For ATM UNI applications, this device provides the ATM Physical Layer (Physical Medium Dependen

XRT79L72 Features

* Integrated T3/E3 Line Interface Unit

* Integrated Jitter Attenuator that can be selected either in Receive or Transmit path

* Flexible integrated Clock Multiplier that takes single frequency clock and generates either DS3 or E3 frequency.

* 8/16 bit UTOPIA Level I