74155

SN74LS155 DUAL 1-OF-4 DECODER/ DEMULTIPLEXER The SN54 / 74LS156 is a high speed Dual 1-of-4 Decoder/Demultiplexer. This device has two decoders with common 2-bit Address inputs and separate gated Enable inputs. Decoder “a” has an 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 output of each decoder will be LOW as selected by the address inputs. The LS156 has open collector outputs for wired-OR (DOT-AND) decoding and function generator applications. The LS156 is fabricated with the Schottky barrier diode process for high speed and are completely compatible with all Motorola TTL families. Schottky Process for High Speed Multifunction Capability Common Address Inputs True or Complement Data Demultiplexing Input Clamp Diodes Limit High Speed Termination Effects ESD > 3500 Volts CONNECTION DIAGRAM DIP (TOP VIEW) VCC Eb Eb A0 O3b O2b O1b O0b 16 15 14 13 12 11 10 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 1 2 3 4 56 78 Ea Ea A1 O3a O2a O1a O0a GND http://onsemi.com DUAL 1-OF-4 DECODER/ DEMULTIPLEXER LS156-OPEN-COLLECTOR LOW POWER SCHOTTKY 16 1 J SUFFIX CERAMIC CASE 620-09 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXD SOIC LOGIC SYMBOL PIN NAMES LOADING (Note a) HIGH LOW A0, A1 Ea, Eb Ea O0 −O3 Address Inputs ...