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Maxim > Products > [T/E Carrier and Packetized Communications] 
DS21455, DS21458
Quad T1/E1/J1 Transceivers

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


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Status
Part Number Status
DS21455 Active: In Production.
DS21458 Active: In Production. But some versions of the family are No Longer Available. See Ordering Information.

Data Sheet
FULL DATA SHEET (PDF, 1.8MB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Errata
  • Errata DS21455 21455_458A2.pdf 
  • Errata DS21458 21455_458A2.pdf 

    • 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.

    An evaluation kit is available:  DS21458DK  

    Key Features   Applications/Uses
    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

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

    Key Specifications:  T/E Carrier & Packetized Products
    Part Number Transmission Standard Functions Channels VSUPPLY
    (V)    		 EV Kit Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    max w/pins See Notes
    DS21455  T1/E1/J1 Framer + LIU 4 3.3 -
    PBGA/256
    		 729 $39.99 @1k
    DS21458  Yes
    CSBGA/256
    		 289 $36.99 @1k
    See All T/E Carrier & Packetized Products (102)

    Diagram
    DS21455: Block Diagram
    Block Diagram

    DS21458: Block Diagram
    Block Diagram

    Application Notes
  		• Application Note 309: Interfacing to the Fractional T1 and E1 - DS21455, DS21458
  		• Application Note 351: T1/E1 and T3/E3 Transformer Selection Guide - DS21455, DS21458
  		• Application Note 390: DS31256 and T1/E1 Interface - DS21455, DS21458
  		• Application Note 400: DS2155 Monitor Mode Design - DS21455, DS21458
  		• Application Note 403: DS2155 and DS26401 Software Comparison - DS21455, DS21458
  		• Application Note 2713: Switching Frame Mode In Live T1 Systems - DS21458
  		• Application Note 3208: Elastic Store Operation - DS21455, DS21458
  		• Application Note 3349: T1/E1 Loopback Operation for Dallas Semiconductor T1/E1/J1 transceivers - DS21455, DS21458
  		• Application Note 3357: DS2155 To DS21458 Migration - DS21458, DS21458
  		• Application Note 3604: JJ-20.11-Compatible Interface for the DS2155 and DS21455 SCTs - DS21455
  		• Application Note 3610: DS21458 Quad and DS26528 Octal Transceiver Software Comparison - DS21455, DS21458
  		• Application Note 3686: DS2155 and DS26521 Software Comparison - DS21455, DS21458

    Evaluation Kits
  		• DS21458DK

    Design Guides
  		• Communications (PDF)

    Reliability Reports
  		• Reliability Report: DS21455.pdf DS21458.pdf

    Software/Models
  		• DS21455 BSDL Model
  		• DS21455 IBIS Model
  		• DS21455 Cadence Concept Symbol
  		• DS21455 Logical Symbol-XML Format
  		• DS21458 IBIS Model
  		• DS21458 BSDL Model

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-10 of 10

    DS21455 Free
    Sample    		 Buy Status Recommended Replacement
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS21455+  
    		Active
    		PBGA;256 pin;729 mm²
    Outline Drawing: 21-0307 (PDF)
    Land Pattern: 90-0267 (PDF)
    Use pkgcode/variation: V256+6*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21455N+  
    		Active
    		PBGA;256 pin;729 mm²
    Outline Drawing: 21-0307 (PDF)
    Land Pattern: 90-0267 (PDF)
    Use pkgcode/variation: V256+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21455  
    		Active
    		PBGA;256 pin;729 mm²
    Outline Drawing: 21-0307 (PDF)
    Land Pattern: 90-0267 (PDF)
    Use pkgcode/variation: V256-6*
    		0°C to +70°C See data sheet
    DS21455N  
    		Active
    		PBGA;256 pin;729 mm²
    Outline Drawing: 21-0307 (PDF)
    Land Pattern: 90-0267 (PDF)
    Use pkgcode/variation: V256-6*
    		-40°C to +85°C See data sheet
    DS21458 Free
    Sample    		 Buy Status Recommended Replacement
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS21458-W+    
    		Active
    		CSBGA;256 pin;289 mm²
    Outline Drawing: 21-0351 (PDF)
    Land Pattern: 90-0291 (PDF)
    Use pkgcode/variation: X256+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21458  
    		Active
    		CSBGA;256 pin;289 mm²
    Outline Drawing: 21-0351 (PDF)
    Land Pattern: 90-0291 (PDF)
    Use pkgcode/variation: X256-2*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS21458+  
    		Active
    		CSBGA;256 pin;289 mm²
    Outline Drawing: 21-0351 (PDF)
    Land Pattern: 90-0291 (PDF)
    Use pkgcode/variation: X256+2*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21458N  
    		Active
    		CSBGA;256 pin;289 mm²
    Outline Drawing: 21-0351 (PDF)
    Land Pattern: 90-0291 (PDF)
    Use pkgcode/variation: X256-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS21458N+  
    		Active
    		CSBGA;256 pin;289 mm²
    Outline Drawing: 21-0351 (PDF)
    Land Pattern: 90-0291 (PDF)
    Use pkgcode/variation: X256+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21458LDK     N/A No Longer Available DS21458DK

    Land Pattern: Not Available

    		0°C to +70°C See data sheet

    More Information
  		• New Product Press Release 2004-04-26 
  		• Design Kit
  		• Product Ad: DS21458

    Related Products
    DS21Q50 Quad E1 Transceiver
    DS21Q59 E1 Quad Transceiver
    DS21Q58 E1 Quad Transceiver
    DS21455, DS21458 Quad T1/E1/J1 Transceivers
    DS21Q55, DS21Q55N Quad T1/E1/J1 Transceiver

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    2007-05-16
    This page last modified: 2009-10-12


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