A semiconductor device is disclosed which includes a storage area such as a RAM, a register, a latch, or a flip-flop. This device further includes a test mode detection circuit for detecting a test mode and a voltage control circuit for generating a power-down voltage that is lower than a power supply...http://www.google.de/patents/US5463585?utm_source=gb-gplus-sharePatent US5463585 - Semiconductor device incorporating voltage reduction circuit therein
