Block selection circuit controlling series—connected pass transistors using shared switch circuit and flash memory including the same

Abstract

A block selection circuit of a flash memory, includes: a first pass transistor connected to an address decoder; a second pass transistor connected in series with the first pass transistor; a first driver circuit configured to control a gate voltage of the first pass transistor based on a first enable signal; a second driver circuit to control a gate voltage of the second pass transistor based on a second enable signal; a first switch circuit to provide a first power voltage or a second power voltage to a gate of the first pass transistor through the first driver circuit based on a first switch signal; and a second switch circuit to share a plurality of memory blocks and provide the first power voltage or the second power voltage to the first switch circuit.