| 摘要 |
PROBLEM TO BE SOLVED: To reduce time for testing a power-on clear circuit and improve productivity. SOLUTION: A P-channel MOS transistor 1 and a capacitive element 2 are inserted in series between power supply potential and ground potential, while their series connection point A is connected to an input end of a voltage follower circuit 4 having an output control terminal 4 and a drain electrode of an N-channel MOS transistor 3 for connecting a source electrode to the ground potential, respectively, and an output of the voltage follower circuit 4 is connected to an output terminal 5. Output voltage of a power-on clear circuit is supplied to a gate electrode of the P-channel MOS transistor 1, a control signal for discharging held charge in the capacitive element 2 is supplied to a gate electrode of the N-channel MOS transistor 3, and an output enable signal for permitting an output is supplied to the output control terminal of the voltage follower circuit 4. |
