CX28333

Advance Information This document contains information on a product under development. The parametric information contains target parameters that are subject to change. CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit The CX28333 is a three-channel, E3/DS3/STS-1 fully-integrated Line Interface Unit (LIU). It is configured via external pins and does not need a microprocessor interface. Each channel has an independent equalizer on the receive side requiring no user configuration. Also, each channel has a programmable transmit pulse shaper that can be set to ensure that the cross-connect pulse mask requirement is met for transmit cable length up to 450 feet. The CX28332 is a dual-channel, and the CX28331 is a single-channel LIU with performance identical to the CX28333. The CX28333 gives the user new economies of scale in concentrator applications where three DS3 or STS-1 channels are concentrated into a single STS-3 channel. By including three independent transceivers on a chip, significant external components are eliminated, with the exception of 1:1 coupling transformers, termination resistors, and supply bypass capacitors. NOTE: Distinguishing Features Can be used as a data transceiver over a maximum of 900 feet of Type 734/728 coaxial cable or equivalent in an on-premise environment Programmable pulse filtering to meet cross-connect pulse masks (ANSI T1.102-1993) Meets jitter specifications of Bellcore GR499, GR253, and TBR24 (with external JA...