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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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Data Sheet
FULL DATA SHEET (PDF, 836kB)
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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.

    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 Number of Channels 5V-Tolerant I/O Supply Voltage (V) EV-Kit Package Price**
    DS21448  T1/E1/J1
    LIU
    4 Yes 3.3 Yes LQFP/128
    TEBGAQ/144
    $24.55 @ 1k
    See All T/E Carrier & Packetized Products (96)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    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: 1-6 of 6

    DS21448 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS21448L  
    LQFP;128 pin;
    Dwg: 21-0086D (PDF)
    Use pkgcode/variation: C128L-3*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS21448L+  
    LQFP;128 pin;
    Dwg: 21-0086D (PDF)
    Use pkgcode/variation: C128L+3*
    0°C to +70°C See data sheet
    DS21448LN  
    LQFP;128 pin;
    Dwg: 21-0086D (PDF)
    Use pkgcode/variation: C128L-3*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS21448LN+  
    LQFP;128 pin;
    Dwg: 21-0086D (PDF)
    Use pkgcode/variation: C128L+3*
    -40°C to +85°C See data sheet
    DS21448  
    TEBGAQ;144 pin;
    Dwg: 56-G6020-001
    Use pkgcode/variation: V144T-1*
    0°C to +70°C See data sheet
    DS21448N  
    TEBGAQ;144 pin;
    Dwg: 56-G6020-001
    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: 2007-08-07



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