Overview

The 728981 is an ST-BUS® compatible digital switch controlled by a microprocessor. The device can handle as many as 128, 64Kbit/s input and output channels. Those 128 channels are divided into four serial inputs and outputs, each of which consists of 32 channels (64Kbit/s per channel) to form a multiplexed 2.048Mb/s stream.

  • 128 x 128 channel non-blocking switch
  • Serial Telecom Bus Compatible (ST-BUS®)
  • 4 RX inputs—32 channels at 64Kbit/s per serial line
  • 4 TX output—32 channels at 64Kbit/s per serial line
  • Three-state serial outputs
  • Microprocessor interface (8-bit data bus)
  • 5V power supply
  • Available in a 44-pin Plastic Leaded Chip Carrier (PLCC), 40-pin Plastic Dip (P-DIP), and 44-pin Plastic Quad Flatpack (PQFP)
  • Operating temperature range: -40 °C to +85 °C

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Pb (Lead) Free
    Carrier Type
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    728981DBG
    circleObsolete
    memory
    view_in_ar
    		PQFP 44 Yes Tray 6.559
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