SN54LS155

DUAL 1-OF-4 DECODER/ 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 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 LS155 and LS156 are fabricated with the Schottky barrier diode process for high speed and are completely compatible with all Motorola TTL families. SN54/74LS155 SN54/74LS156 DUAL 1-OF-4 DECODER/ DEMULTIPLEXER LS156-OPEN-COLLECTOR LOW POWER SCHOTTKY 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 J SUFFIX CERAMIC CASE 620-09 16 1 16 N SUFFIX PLASTIC CASE 648-08 1 CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 Eb 15 Eb 14 A0 13 O3b 12 O2b 11 O1b 10 O0b 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION 1 Ea 2 Ea 3 A1 4 O3a 5 O2a 6 O1a 7 O0a 8 GND SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LOGIC SYMBOL PIN NAMES A0, A1 Ea, Eb Ea O0 – O3 Address Input...