54LS155

54LS155 DM54LS155 DM74LS155 54LS156 DM54LS156 DM74LS156 Dual 2-Line to 4-Line Decoders Demultiplexers June 1989 54LS155 DM54LS155 DM74LS155 54LS156 DM54LS156 DM74LS156 Dual 2-Line to 4-Line Decoders Demultiplexers General Description These TTL circuits feature dual 1-line-to-4-line demultiplexers with individual strobes and common binary-address inputs in a single 16-pin package When both sections are enabled by the strobes the common address inputs sequentially select and route associated input data to the appropriate output of each section The individual strobes permit activating or inhibiting each of the 4-bit sections as desired 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 decoder or 1-to-8-line demultiplexer without external gating Input clamping diodes are provided on these circuits to minimize transmission-line effects and simplify system design Features Y Y Y Y Y Applications Dual 2-to-4-line decoder Dual 1-to-4-line demultiplexer 3-to-8-line decoder 1-to-8-line demultiplexer Individual strobes simplify cascading for decoding or demultiplexing larger words Input clamping diodes simplify system design Choice of outputs Totem-pole (LS155) Open-collector (LS156) Alternate Military Aerospace device (54LS155 156) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram and Function Tables Dual-In-Line Package 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 Select B X L L H H X A X L H L H X Strobe G1 H L L L L X Inputs (5) (6) (7) Select B X L L H H X A X L H L H X Strobe G2 H L L L L X Data C2 X L L L L H 2Y0 H L H H H H 2Y1 H H L H H H 2Y2 H H H L H H 2Y3 H H H H L H Data C1 X H H H H L 1Y0 H L H H H H 1Y1 H H L H H H 1Y2 H H H L H H 1Y3 H H H H L H Outputs TL F 6395 – 1 3-Line-to-8-Line Decoder or 1-Line-to-8-Line Demultiplexer Inputs Strobe Select (0) Or Data C X L L L L H H H H BA X L L H H L L H H X L H L H L H L H G H L L L L L L L L H L H H H H H H H (1) (2) Outputs (3) (4) Outputs 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3 H H L H H H H H H H H H L H H H H H H H H H L H H H H H H H H H L H H H H H H H H H L H H H H H H H H H L H H H H H H H H H L 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 TL F 6395 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range b 55 C to a 125 C DM54LS and 54LS DM74LS 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation Recommended Operating Conditions Symbol VCC VIH VIL VOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature b 55 DM54LS155 Nom 5 Max 55 Min 4 75 2 07 b0 4 DM74LS155 Nom 5 Max 5 25 Units V V 08 b0 4 45 2 V mA mA C 4 125 0 8 70 ’LS155 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIL e Max VIH e Min IOL e 4 mA VCC e Min II IIH IIL IOS Input Current Input Voltage Max VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) DM54 DM74 b 20 b 20 Min Typ (Note 1) Max b1 5 Units V V DM54 DM74 DM54 DM74 DM74 25 27 34 34 0 25 0 35 0 25 04 05 04 01 20 b 0 36 b 100 b 100 VOL V mA mA mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current ICC 61 10 Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second Note 3 ICC is measured with all outputs open A B and C1 inputs at 4 5V and C2 G1 and G2 inputs grounded 2 ’LS155 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) To (Output) RL e 2 kX CL e 15 pF Min tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output A B C2 G1 or G2 to Y A B C2 G1 or G2 to Y A or B to Y A or B to Y C1 to Y C1 to Y Max 18 27 18 27 20 27 CL e 50 pF Min Max 22 35 24 35 24 35 ns ns ns ns ns ns Units Symbol Parameter Recommended Operating Conditions Symbol VCC VIH VIL VOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Current Free Air Operating Temperature b 55 DM54LS156 Nom 5 Max 55 Min 4 75 2 07 55 4 125 0 DM74LS156 Nom 5 Max 5 25 Units V V 08 55 8 70 V V mA C 45 2 ’LS156 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI ICEX VOL Parameter Input Clamp Voltage High Level Output Current Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min VO e 5 5V VIL e Max VIH e Min VCC e Min IOL e Max VIL e Max VIH e Min IOL e 4 mA VCC e Min II IIH IIL ICC Input Current Input Voltage Max VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) 61 DM54 DM74 DM74 0 25 0 35 0 25 Min Typ (Note 1) Max b1 5 Units V mA 100 04 05 04 01 20 b 0 36 V mA mA mA mA High Level Input Current Low Level Input Current Supply Current 10 Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 ICC is measured with all outputs open A B and C1 inputs at 4 5V and C2 G1 and G2 grounded 3 ’LS156 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) To (Output) RL e 2 kX CL e 15 pF Min tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output A B C2 G1 or G2 to Y A B C2 G1 or G2 to Y A or B to Y A or B to Y C1 to Y C1 to Y Max 28 33 28 33 28 34 CL e 50 pF Min Max 53 43 53 43 53 43 ns ns ns ns ns ns Units Symbol Parameter Logic Diagram TL F 6395 – 2 4 5 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier (E) Order Number 54LS155LMQB NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS155DMQB 54LS156DMQB DM54LS155J or DM54LS156J NS Package Number J16A 6 Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS155M or DM74LS156M NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS155N or DM74LS156N NS Package Number N16E 7 54LS155 DM54LS155 DM74LS155 54LS156 DM54LS156 DM74LS156 Dual 2-Line to 4-Line Decoders Demultiplexers Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54LS155FMQB 54LS156FMQB DM54LS155W or DM54LS156W NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or 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