Part Details
  • 8 Independent, Full-Featured T1/E1/J1 Framers/Formatters
  • Independent Transmit and Receive Paths
  • Flexible Signaling Extraction and Insertion
  • Alarm Detection and Insertion
  • Transmit Synchronizer
  • AMI, B8ZS, HDB3, NRZ Line Coding
  • Performance Monitor Counters
  • BOC Message Controller (T1)
  • Two-Frame Elastic Store Buffers for Each Transmitter and Receiver
  • One HDLC Controller per Framer
  • RAI-CI and AIS-CI Support
  • Full-Feature BERT can be Mapped to Any Port
  • Flexible TDM Backplane Supports Bus Rates from 1.544MHz to 16.384MHz
  • Internal Clock Generator (CLAD) Supplies 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz
  • JTAG Test Port
  • Single 3.3V Supply with 5V Tolerant Inputs
  • 17mm x 17mm, 256-Pin BGA (1.00mm Pitch)
Additional Details
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The DS26401 is an octal, software-selectable T1, E1, or J1 framer. It is composed of 8 framer/formatters and a system (backplane) interface. Each framer has an HDLC controller that can be mapped to any DS0 or FDL (T1)/Sa (E1) bit. The DS26401 also includes a full-feature BERT device, which can be used with any of the 8 T1/E1 ports, and an internal clock adapter useful for creating synchronous, high-frequency backplane timing. The DS26401 is controlled through an 8-bit parallel port that can be configured for nonmultiplexed Intel or Motorola operation.


  • Add/Drop Multiplexers
  • Automatic Teller Machine Systems
  • Central Office Equipment
  • Customer Premise Equipment
  • DSLAM Backplane
  • IMA
  • Line Cards
  • PBXs
  • Routers/Switches
  • Routers/Switches
  • Timing Systems
  • WAN Interface

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Software and Part Ecosystem

Software and Part Ecosystem

Evaluation Kit

Evaluation Kits 1


Octal T1/E1/J1 Framer Design Kit Daughter Card



Octal T1/E1/J1 Framer Design Kit Daughter Card

Octal T1/E1/J1 Framer Design Kit Daughter Card

Features and Benefits

  • Demonstrates Key Functions of the DS26401 Octal T1/E1/J1 Framer
  • Includes Two DS21448 Quad LIUs, Transformers, BNC and RJ45 Connectors, and Termination Passives
  • Compatible with DK101 and DK2000 Demo Kit Motherboards
  • DK101/DK2000 and ChipView Software Provide Point-and-Click Access to the DS26401 Register Set
  • All Equipment-Side Framer Pins are Easily Accessible for External Data Source/Sink
  • Memory-Mapped FPGA Provides Flexible Clock/Data/Sync Connections Among Framer Ports and DK2000 Motherboard
  • LEDs for Loss-of-Signal, Loss-of-Frame, and Interrupt
  • Easy-to-Read Silk-Screen Labels Identify the Signals Associated with All Connectors, Jumpers, and LEDs

Product Detail

The DS26401DK is an easy-to-use evaluation board for the DS26401 octal T1/E1/J1 framer. It is intended to be used as a daughter card with the DK101 motherboard or the DK2000 motherboard. The DS26401DK comes complete with a DS26401 octal framer, two DS21448 quad LIUs, transformers, termination resistors, network connectors, and motherboard connectors. The DK101/DK2000 motherboard and the Dallas' ChipView software give point-and-click access to configurations and status registers from a Windows® -based PC. On-board LEDs indicate loss-of-signal, loss-of-frame, and interrupt status.

Each DS26401DK is shipped with a free DK101 motherboard. For complex applications, the DK2000 high-performance demo kit motherboard can be purchased separately.

Design Kit Contents:

  • DS26401DK Board
  • DK101 Low-Cost Motherboard
  • CD-ROM
    • DS26401DK Data Sheet
    • DK101 Data Sheet
    • DS26401 Data Sheet (PDF)
    • DS21448 Data Sheet (PDF)
    • DS26401 Errata Sheet (PDF)
    • DS21448 Errata Sheet (PDF)


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