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DS21448
3.3V E1/T1/J1 Quad Line Interface

3.3V E1/T1/J1 Quad Line Interface Unit for Short-Haul and Long-Haul Applications


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 836kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Errata
  • Errata DS21448 21448A1.pdf 
  • Description
    The DS21448 is a quad-port E1 or T1 line interface unit (LIU) for short-haul and long-haul applications. It incorporates four independent transmitters and four independent receivers in a single 144-pin PBGA or 128-pin LQFP package. The transmit drivers generate the necessary G.703 E1 waveshapes in 75Ω or 120Ω applications and the DSX-1 or CSU line build-outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1 applications.

    An evaluation kit is available:  DS21448DK  

    Key Features   Applications/Uses
    • Four Complete E1, T1, or J1 LIUs
    • Supports Long- and Short-Haul Trunks
    • Internal Software-Selectable Receive-Side Termination for 75Ω/100Ω/120Ω
    • 3.3V Power Supply
    • 32-Bit or 128-Bit Crystal-Less Jitter Attenuator Requires Only a 2.048MHz Master Clock for E1 and T1, with the Option to Use 1.544MHz for T1
    • Generates the Appropriate Line Build-Outs With and Without Return Loss for E1, and DSX-1 and CSU Line Build-Outs for T1
    • AMI, HDB3, and B8ZS Encoding/Decoding
    • 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz Clock Output Synthesized to Recovered Clock
    • Programmable Monitor Mode for Receiver
    • Loopbacks and PRBS Pattern Generation/ Detection with Output for Received Errors
    • Generates/Detects In-Band Loop Codes, 1 to 16 Bits, Including CSU Loop Codes
    • 8-Bit Parallel or Serial Interface with Optional Hardware Mode
    • Muxed and Nonmuxed Parallel Bus Supports Intel or Motorola
    • Detects/Generates Blue (AIS) Alarms
    • NRZ/Bipolar Interface for Tx/Rx Data I/O
    • Transmit Open-Circuit Detection
    • Receive Carrier Loss (RCL) Indication (G.775)
    • High-Z State for TTIP and TRING
    • 50mARMSTransmit Current Limiter
    • JTAG Boundary Scan Test Port per IEEE 1149.1
    • Meets Latest E1 and T1 Specifications Including ANSI.403-1999, ANSI T1.408, AT&T TR 62411, ITU G.703, G.704, G.706, G.736, G.775, G.823, I.431, O.151, O.161, ETSI ETS 300 166, JTG.703, JTI.431, TBR12, TBR13, and CTR4

     
  • Central-Office Switches and PBX Interfaces
  • Integrated Multiservice Access Platforms
  • T1/E1 Cross-Connects, Multiplexers, and Channel Banks
  • T1/E1 LAN/WAN Routers
  • Wireless Base Stations

    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
    DS21448  T1/E1/J1 LIU 4 3.3 Yes
    LQFP/128
    TEPBGA/144
    289 $24.55 @1k
    See All T/E Carrier & Packetized Products (102)

    Diagram
    DS21448: Block Diagram
    Block Diagram

    Application Notes
  • Application Note 351: T1/E1 and T3/E3 Transformer Selection Guide - DS21448
  • Application Note 402: Additional Pulse Amplitude Settings for DS2148, DS21348, DS21Q48, DS21Q348 and DS21448 - DS21448
  • Application Note 3556: Configuring Dallas Semiconductor LIUs Without a Microcontroller - DS21448

    Evaluation Kits
  • DS21448DK

    Design Guides
  • Communications (PDF)

    Reliability Reports
  • Reliability Report: DS21448.pdf

    Software/Models
  • DS21448CSBGA BSDL Model
  • DS21448LQFP BSDL Model
  • DS21448 Logical Symbol-XML Format
  • DS21448 Cadence Concept Symbol

    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: 1-8 of 8

    DS21448 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS21448L  
    Active LQFP;128 pin;360 mm²
    Outline Drawing: 21-0086 (PDF)
    Land Pattern: 90-0143 (PDF)
    Use pkgcode/variation: C128L-3*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS21448L+  
    Active LQFP;128 pin;360 mm²
    Outline Drawing: 21-0086 (PDF)
    Land Pattern: 90-0143 (PDF)
    Use pkgcode/variation: C128L+3*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21448LN    
    Active LQFP;128 pin;360 mm²
    Outline Drawing: 21-0086 (PDF)
    Land Pattern: 90-0143 (PDF)
    Use pkgcode/variation: C128L-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS21448LN+  
    Active LQFP;128 pin;360 mm²
    Outline Drawing: 21-0086 (PDF)
    Land Pattern: 90-0143 (PDF)
    Use pkgcode/variation: C128L+3*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21448GN+    
    Active TEPBGA;144 pin;289 mm²
    Outline Drawing: 21-0309 (PDF)
    Land Pattern: 90-0268 (PDF)
    Use pkgcode/variation: V144T+1*
    -40°C to +85°C See data sheet
    DS21448G+    
    Active TEPBGA;144 pin;289 mm²
    Outline Drawing: 21-0309 (PDF)
    Land Pattern: 90-0268 (PDF)
    Use pkgcode/variation: V144T+1*
    -40°C to +85°C See data sheet
    DS21448  
    Active TEPBGA;144 pin;289 mm²
    Outline Drawing: 21-0309 (PDF)
    Land Pattern: 90-0268 (PDF)
    Use pkgcode/variation: V144T-1*
    0°C to +70°C See data sheet
    DS21448N  
    Active TEPBGA;144 pin;289 mm²
    Outline Drawing: 21-0309 (PDF)
    Land Pattern: 90-0268 (PDF)
    Use pkgcode/variation: V144T-1*
    -40°C to +85°C See data sheet

    More Information
  • New Product Press Release 2003-05-28 
  • Development Kit

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    Document Ref.: xxx; 2006-01-23
    This page last modified: 2009-10-13


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