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ElectroComponent Science and Technology
Volume 4, Issue 3-4, Pages 185-191

A High Speed ECL Multiplexer in Beam Lead, Hybrid Technology

1Philips Research Laboratories, Redhill, UK
2Philips Research Laboratories, Eindhoven, The Netherlands

Received 13 June 1977

Copyright © 1977 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A high speed ECL multiplexing unit which accepts 4 channels of data and control information is described. Compatibility with commercial circuits to facilitate economic interfacing at low speed data rates is an integral design criterion. Built from flip-flops and gates made in a 5 GHz fT chip technology which includes two-level metallisation and gold beam leads, the multiplexer is mounted on a ceramic substrate and contained in a standard DIL package. Dissipating less than 0.75 watt it outputs data faster than 300 Mb/s. Some conclusions concerning the merits of combining hybrid and monolithic technology are drawn.