Quad T1/E1/J1 Transceiver

Overview

Technical Documents

Ordering Info

Status

Not Recommended for New Designs

Description

The DS21Q55 is a quad software-selectable T1, E1, or J1 MCM device for short-haul and long-haul applications. Each port is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled by an 8-bit parallel port configured for Intel or Motorola bus operations. The DS21Q55 is software compatible with the DS2155 single-chip transceiver. It is pin compatible with the DS21Qx5y family of products.

Data Sheet

Download	Rev 1	(PDF, 1.4MB)
E-Mail

Errata DS21Q55 21Q55B1.pdf

Key Features

Complete T1/DS1/ISDN-PRI/J1 Transceiver Functionality
Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality
Long-Haul and Short-Haul Line Interface for Clock/Data Recovery and Waveshaping
CMI Coder/Decoder for Optical I/F
Crystal-Less Jitter Attenuator
Fully Independent Transmit and Receive Functionality
Dual HDLC Controllers
Programmable BERT Generator and Detector
Internal Software-Selectable Receive and Transmit-Side Termination Resistors for 75Ω /100Ω /120Ω T1 and E1 Interfaces
Dual Two-Frame Elastic-Store Slip Buffers that Connect to Asynchronous Backplanes Up to 16.384MHz
16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz Clock Output Synthesized to Recovered Network Clock

Applications/Uses

Channel Banks
Channel Service Units (CSUs)
Data Service Units (DSUs)
DSL Add/Drop Multiplexers
Muxes
Routers/Switches
Routers/Switches
T1/E1 Test Equipment

Diagram

Block Diagram

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Errata Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: xxxx Rev 1; 2004-04-23
This page last modified: 2009-10-15