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54LS155LMQB Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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54LS155LMQB Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
1 / 8 page TLF6395 June 1989 54LS155DM54LS155DM74LS155 54LS156DM54LS156DM74LS156 Dual 2-Line to 4-Line DecodersDemultiplexers General Description These TTL circuits feature dual 1-line-to-4-line demultiplex- ers with individual strobes and common binary-address in- puts in a single 16-pin package When both sections are enabled by the strobes the common address inputs se- quentially select and route associated input data to the ap- propriate output of each section The individual strobes per- mit activating or inhibiting each of the 4-bit sections as de- sired Data applied to input C1 is inverted at its outputs and data applied at C2 is true through its outputs The inverter following the C1 data input permits use as a 3-to-8-line de- coder or 1-to-8-line demultiplexer without external gating Input clamping diodes are provided on these circuits to mini- mize transmission-line effects and simplify system design Features Y Applications Dual 2-to-4-line decoder Dual 1-to-4-line demultiplexer 3-to-8-line decoder 1-to-8-line demultiplexer Y Individual strobes simplify cascading for decoding or demultiplexing larger words Y Input clamping diodes simplify system design Y Choice of outputs Totem-pole (LS155) Open-collector (LS156) Y Alternate MilitaryAerospace device (54LS155156) is available Contact a National Semiconductor Sales Of- ficeDistributor for specifications Connection Diagram and Function Tables Dual-In-Line Package TLF6395 – 1 3-Line-to-8-Line Decoder or 1-Line-to-8-Line Demultiplexer Inputs Outputs Select Strobe (0) (1) (2) (3) (4) (5) (6) (7) Or Data C BA G 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3 X X X H HHHHHHHH L L L L L H HHHHHH L L H L H L HHHHHH L H L L HH L HHHHH L H H L HHH L HHHH H L L L HHHH L HHH H L H L HHHHH L H H H H L L HHHHHH L H H H H L HHHHHHH L Order Number 54LS155DMQB 54LS155FMQB 54LS155LMQB DM54LS155J DM54LS155W DM74LS155M DM74LS155N 54LS156DMQB 54LS156FMQB DM54LS156J DM54LS156W DM74LS156M or DM74LS156N See NS Package Number E20A J16A M16A N16E or W16A 2-Line-to-4-Line Decoder or 1-Line-to-4-Line Demultiplexer Inputs Outputs Select Strobe Data B A G1 C1 1Y0 1Y1 1Y2 1Y3 X X H X HHHH L L L H L HHH L H L H HLH H H L L H H HLH H H L H HHH L X X X L HHHH Inputs Outputs Select Strobe Data B A G2 C2 2Y0 2Y1 2Y2 2Y3 X X H X HHHH L L L L L HHH L H L L HLH H H L L L H HLH H H L L HHH L X X X H HHHH C e inputs C1 and C2 connected together G e inputs G1 and G2 connected together H e high level L e low level X e don’t care C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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