Provided is a multi-threshold complementary metal oxide semiconductor
(MTCMOS) latch circuit including: a data inverting circuit for inverting
and outputting input data under the control of a sleep control signal; a
transmission gate for transferring the data signal output from the data
inverting circuit under the control of a clock control signal; a signal
control circuit for outputting the data signal output from the
transmission gate under the control of a reset control signal and the
sleep control signal; and a feedback circuit for feeding back the signal
output from the signal control circuit and preserving the data in a sleep
mode. The MTCMOS latch circuit can minimize power consumption caused by a
leakage current due to elements scaled down to nano scale and also
contribute to high-speed operation of a logic circuit by using an element
having a low threshold voltage.