US Patent 7421631 Semiconductor device with termination resistor circuit

A semiconductor device includes a signal line, a test load circuit and a termination circuit. The signal line is connected with an input/output node of the semiconductor device. The test load circuit has a test resistor and is provided between the signal line and a first one of power lines to connect the signal line to the first power line through the test resistor in response to a test start signal. The termination circuit has first and second resistors, and is provided between the first power line and a second power line as the other power line to disconnect the signal line from the first and second power lines in response to the test start signal. Also, the test load circuit disconnects the signal line from the first power line in response to a test end signal, and the termination circuit connects the signal line with the first and second power lines through the first and second resistors in response to the test end signal.