Allentown, Pa. – Agere Systems last week launched an 8 million-gate chip to move traffic from copper-based network-access facilities to high-speed access and transport systems like DS3 and Sonet/SDH.

In this article, we will clarify how to build a bidirectional 2-bit mux circuit that can be used with I 2 C lines. The circuit also has the extra functionality of operating as a level shifter, if ...