Maxim
›
Products
›
Communications
›
DS21455

DS21455

Quad T1/E1/J1 Transceivers

Industry's First 4-Port Transceivers to Switch Among All T1, E1, and J1 Standards without External Component Changes

Data Sheet
Subscribe

Please check latest availability status for a specific part variant.

Overview

Description

The DS21455 and DS21458 are quad monolithic devices featuring independent transceivers that can be software configured for T1, E1, or J1 operation. Each is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via an 8-bit parallel port configured for Intel or Motorola bus operations. The DS21455* is a direct replacement for the older DS21Q55 quad MCM device. The DS21458, in a smaller package (17mm CSBGA) and featuring an improved controller interface, is software compatible with the older DS21Q55.

*The JTAG function on the DS21455/DS21458 is a single controller for all four transceivers, unlike the DS21Q55, which has a JTAG controller-per-transceiver architecture.
DS21455: Block Diagram DS21455: Block Diagram Enlarge+

Key Features

Four Independent Transceivers, Each Having the Following Features:
  • Complete T1 (DS1)/ISDN-PRI/J1 Transceiver Functionality
  • Complete E1 (CEPT) PCM-30/ISDN-PRI Transceiver Functionality
  • Short- and Long-Haul Line Interface for Clock/Data Recovery and Waveshaping
  • CMI Coder/Decoder
  • Crystal-Less Jitter Attenuator
  • Fully Independent Transmit and Receive Functionality
  • Dual HDLC Controllers
  • On-Chip 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 can Connect to Asynchronous Backplanes Up to 16.384MHz
  • 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz Clock Output Synthesized to Recovered Network Clock
  • Programmable Output Clocks for Fractional T1, E1, H0, and H12 Applications
  • Interleaving PCM Bus Operation
  • 8-Bit Parallel Control Port, Multiplexed or Nonmultiplexed, Intel or Motorola
  • IEEE 1149.1 JTAG-Boundary Scan
  • 3.3V Supply with 5V Tolerant Inputs and Outputs
  • DS21455 Directly Replaces DS21Q55
  • Signaling System 7 (SS7) Support
  • RAI-CI, AIS-CI Support

Applications/Uses

  • Channel Banks
  • Channel Service Units (CSUs)
  • Data Service Units (DSUs)
  • Muxes
  • Routers
  • Switches
  • T1/E1 Test Equipment

Design Resources

Technical Documents

App Note 3686 DS2155 and DS26521 Software Comparison
App Note 3610 DS21458 Quad and DS26528 Octal Transceiver Software Comparison
App Note 3604 JJ-20.11-Compatible Interface for the DS2155 and DS21455 SCTs
App Note 3349 T1/E1 Loopback Operation for Maxim T1/E1/J1 Transceivers
App Note 3208 Elastic Store Operation
App Note 403 DS2155 and DS26401 Software Comparison
App Note 400 DS2155 Monitor Mode Design
App Note 390 DS31256 and T1/E1 Interface
App Note 351 T1/E1 and T3/E3 Transformer Selection Guide
App Note 324 T1/E1 Network Interface Design
App Note 309 Interfacing to the Fractional T1 and E1

Quality and Environmental Data

Product Reliability Reports: DS21455.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Design Kit

Tools & Models

  • DS21455 BSDL Model
  • DS21455 IBIS Model

    • CAD Symbols and Footprints

  • DS21455N+
    •

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

    Order

     
    Status:
    Package:
    Temperature:

    Related Resources

    Related Products

    Tools & Models

    Technical Docs

    Reference Designs

    Type ID Title
    Evaluation Board4255DS21458DK Design Kit for the DS21458 Quad T1/E1/J1 Transceiver Daughter Card

    Events


    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

    RSVP