datasheets 74ls155 free download

File name 74ls155.pdf

SN54/74LS155 DUAL 1-OF-4 DECODER/ SN54/74LS156 DEMULTIPLEXER The SN54 / 74LS155 and SN54 / 74LS156 are high speed Dual 1-of-4 Decoder/Demultiplexers. These devices have two decoders with common 2-bit Address inputs and separate gated Enable inputs. Decoder "a" has an DUAL 1-OF-4 DECODER / Enable gate with one active HIGH and one active LOW input. Decoder "b" has two active LOW Enable inputs. If the Enable functions are satisfied, one DEMULTIPLEXER output of each decoder will be LOW as selected by the address inputs. The LS156-OPEN-COLLECTOR LS156 has open collector outputs for wired-OR (DOT-AND) decoding and LOW POWER SCHOTTKY function generator applications. The LS155 and LS156 are fabricated with the Schottky barrier diode process for high speed and are completely compatible with all Motorola TTL families.