ADDRESS BUFFER FOR ASSURING CONVERSION MARGIN BY RECEIVING EXTERNAL ADDRESS AND BURST MODE ADDRESS DISCRIMINATIVELY

摘要

PURPOSE: An address buffer is provided which can assure conversion margin by receiving an external address inputted from the external of a SDRAM(Synchronous Dynamic RAM) in a normal mode and a burst mode address generated from a counter in the SDRAM in a burst mode. CONSTITUTION: An address buffer(10) assures a sufficient conversion margin by receiving an external address and a burst mode address, in a conversion operation of transferring the external address to an internal address or the burst mode address to the internal address. The address buffer comprises: an external address input part(12) receiving the external address in response to the first clock signal and an external address latch signal latching the external address; a burst mode address input part(14) receiving the burst mode address in response to the first clock signal and the external address latch signal; and an address switching part(16) transferring the external address to the inner address in response to the external address latch signal, and transferring the burst address to the inner address in response to the first clock signal and the burst mode address latch signal latching the burst mode address.