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DS21FF42, DS21FT42
4 x 4 16 Channel T1 Framer / 4 x 3 12 Channel T1 Framer


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Data Sheet
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Description
The 4 x 4 and 4 x 3 multichip modules (MCM) offer a high-density packaging arrangement for the DS21Q42 T1 Enhanced Quad Framer. Either three (DS21FT42) or four (DS21FF42) silicon die of these devices is packaged in an MCM with the electrical connections as shown in Figure 1-1.

All of the functions available on the DS21Q42 are also available in the MCM packaged version. However, in order to minimize package size, some signals have been deleted or combined. These differences are detailed in Table 1-1. In the 4 x 3 (FT) version, the fourth quad framer is not populated and hence all of the signals to and from this fourth framer are absent and should be treated as No Connects (NC). Table 2-1 lists all of the signals on the MCM and it also lists the absent signals for the 4 x 3.

The availability of both a 12-channel and a 16-channel version allow the maximum framer density with the lowest cost. For example, in a T3 application, two devices (one DS21FF42 and one DS21FT42) provide 28 framers without the additional cost and power consumption of any unused framers that appear in an octal approach.

Key Features   Applications/Uses
  • 16 or 12 completely independent T1 framers in one small 27mm x 27mm, 1.27mm pitch BGA package
  • Each multichip module (MCM) contains four (FF) or three (FT) DS21Q42 die
  • Each quad framer can be concatenated into a single 8.192MHz backplane data stream
  • IEEE 1149.1 JTAG-Boundary Scan Architecture
  • DS21FF42 and DS21FT42 are pin compatible with DS21FF44 and DS21FT44, respectively, to allow the same footprint to support T1 and E1 applications
  • 300-pin MCM 1.27mm pitch BGA package (27mm x 27mm)
  • Low-power 3.3V CMOS with 5V tolerant input and outputs

 
  • DSLAM
  • High-Density Line Cards
  • Multiplexers/Demultiplexers
  • Routers/Switches

    Key Specifications:   T/E Carrier & Packetized Products
    Part Number Transmission Standard Functions Number of Channels 5V-Tolerant I/O Supply Voltage (V) RoHS Available Package Price**
    DS21FF42  T1/J1
    Framer
    16 Yes 3.3 Yes BGA/300
    MCMBGA/300
    $120.00 @ 1k
    DS21FT42  12 No MCMBGA/300 $113.15 @ 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 309: Interfacing to the Fractional T1 and E1 - DS21FF42, DS21FT42
  • Application Note 310: D4 Framing and Signaling - DS21FF42, DS21FT42
  • Application Note 336: Transparent Operation on T1, E1 Framers and Transceivers - DS21FF42, DS21FT42
  • Application Note 342: T1/E1 Framer Initialization and Programming - DS21FF42, DS21FT42
  • Application Note 345: DS21352/552, DS2151, DS2152, DS2141A, DS21Q42 Programming SLC-96 - DS21FF42, DS21FT42
  • Application Note 382: J1 Japanese Standards - DS21FF42, DS21FT42
  • Application Note 394: HDLC Configuration of Framers and Transceivers - DS21FF42, DS21FT42
  • Application Note 461: Programming and Controlling the FDL on DS2141A, DS2151 - DS21FF42, DS21FT42
  • Application Note 2713: Switching Frame Mode In Live T1 Systems - DS21FF42, DS21FT42
  • Application Note 3345: Examples of DS31256 Applications - DS21FF42, DS21FT42
  • Application Note 3760: Interleaved Bus Operation - DS21FF42, DS21FT42

    Evaluation Kits
    none

    Design Guides
  • COMMUNICATIONS (PDF)

    Reliability Reports
  • Request Reliability Report for:

    Software/Models
  • DS21Q42 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: 1-6 of 6

    DS21FF42 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS21FF42+  
    BGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300+2*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21FF42N+  
    BGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300+2*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS21FF42  
    MCMBGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS21FF42N  
    MCMBGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS21FT42 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS21FT42  
    MCMBGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS21FT42N  
    MCMBGA;300 pin;
    Dwg: 56-G6003-001
    Use pkgcode/variation: V300-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

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    2002-08-09
    This page last modified: 2007-06-21



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