Abstract: A power-up switching circuit which comprises a source of voltage (V.sub.CC) and a reference voltage circuit or voltage divider (R1, R2, N6) coupled to the source of voltage to provide a reference voltage. The reference voltage circuit also has a first switch (P5 and N5) in series therewith. Circuitry (MCAP1, P2, N2, P1, P4, D1) is provided including a first node (S2) responsive to ramping up of the voltage from the source of voltage at the first node to cause the reference voltage circuit including the first switch to be conducting to cause current to pass through the reference voltage circuit and provide a reference voltage. Circuitry (N1, D2) is provided which is responsive to arrival of the reference voltage at a predetermined voltage level to decrease the voltage at the first node sufficiently to electrically remove the first switch from the reference voltage circuit and disconnect the reference voltage circuit's current path from the source of voltage to ground.