SEMCONDUCTOR INTEGRATED CIRCUIT HAVING A TEST CIRCUIT

摘要

A semiconductor integrated circuit has a discrimination circuit connected between power source terminals (VDD,VSS) and three input terminals (IN1-IN3), the discrimination circuit discriminating specific operating modes with option functions. The discrimination circuit includes a voltage limiter (22) for limiting an input potential applied to the input terminals in opposition to the power sources, to a predetermined input logic level and an option means (24) connected to the limiter (22) to determine the current flow of the limiter (22) in a chip manufacturing process.