Patent ID: 8724409

Claim:
A semiconductor integrated circuit which operates in a package test mode and a normal operation mode, the semiconductor integrate circuit comprising: an internal reference voltage generation unit configured to generate an internal reference voltage and output the internal reference voltage to a node; a high voltage generation unit configured to pump an external driving voltage based on a voltage applied from the node, and generate a high voltage having a specified level by performing a pumping operation in the package test mode and the normal operation mode; and a reference voltage transfer unit configured to receive a reference voltage, generate a test reference voltage based on the reference voltage to correspond to a change in a driving operation of the external driving voltage applied from outside, and monitor a voltage level of the node in the package test mode, wherein the reference voltage transfer unit comprises: a first buffer section configured to compare the reference voltage generated from the reference voltage generation unit with a first driving voltage when the reference voltage is inputted at a first level, and activate the test reference voltage outputted as a result of comparison, according to a change in a driving operation of a second driving voltage; a second buffer section configured to compare the reference voltage generated from the reference voltage generation unit with the second driving voltage when the reference voltage is inputted at a second level, and deactivate the test reference voltage outputted as a result of comparison; and a transfer section configured to output the test reference voltage to the node which is formed between the internal reference voltage generation unit and the high voltage generation unit, in response to a mode select signal applied from outside.