Patent ID: 6185139
Filing Date: 2001-02-06
Classification: G01R

Abstract:
An integrated circuit memory which receives a power supply voltage on an external pin and has high voltage internal circuitry which receives the power supply voltage and low voltage internal circuitry, comprising:a first external pin which receives a first information signal which provides operating information within a predetermined voltage range and provides burn-in enable information when at a different voltage outside the predetermined voltage range;a burn-in enable detector, coupled to the first external pin, which provides a burn-in enable signal in response to the first information signal being at the different voltage;a reference generator having an output;a regulator having a reference input and an output coupled to the low voltage internal circuitry;a multiplexer having a first input coupled to the output of the reference generator, a second input for receiving a burn-in voltage, and a control input for receiving the burn-in enable signal.