Bell Laboratories launched the solid state industry by inventing the transistor to replace power-hungry vacuum tubes. We're tapping the same expertise and system know-how to develop analog line card solutions for today's applications. Low power consumption is a prime consideration in reducing the power drain of equipment that sits further and further from the battery plant. The six available interchangeable chips provide different battery reversal options, switching regulators or battery selector switches, depending on system requirements. Moreover, the devices feature independently adjustable DC and AC parameters, including overhead voltage for 2.2V metering injection, DC feed resistance, loop current limiting and termination impedance.
Thermal protection is an additional standard feature.
All of the new SLICs are currently sampling, and qualified customers are fully supported with evaluation boards and design software. Two available 32-pin PLCC SLICs in the ATTL755X series are able to switch between two battery sources, offering power consumption saving depending on loop length. By the end of 1996, it will become part of a new communications systems and technology company that will market consumer and business telephone systems and network infrastructure equipment. Bell Laboratories will continue to be the research and development engine for that company. All rights reserved.