74LS155

74LS155 NSC | Alldatasheet

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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 Military/Aerospace device (54LS155/156) is available. Contact a National Semiconductor Sales Of- fice/Distributor for specifications. Connection Diagram and Function Tables Dual-In-Line Package TL/F/6395–1 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 C² BA G ³ 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3 X X X H HHHHHHHH L L L L LHHHHHHH L L H L HLHHHHHH L H L L HHLHHHHH L H H L HHHLHHHH H L L L HHHHLHHH H L H L HHHHHLHH H H L L HHHHHHLH H H H L HHHHHHHL 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 LHHH L H L H HLHH H L L H HHLH H H L H HHHL 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 LHHH L H L L HLHH H L L L HHLH H H L L HHHL X X X H HHHH ²C e inputs C1 and C2 connected together ³G 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-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 DM54LS and 54LS b55§Ct o a125§C DM74LS 0 §Ct o a70§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. 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 Parameter DM54LS155 DM74LS155 Units Min Nom Max Min Nom Max VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 0.7 0.8 V VOH High Level Output Current b0.4 b0.4 mA IOL Low Level Output Current 4 8 mA TA Free Air Operating Temperature b55 125 0 70 §C ’LS155 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 18 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max DM54 2.5 3.4 VVoltage V IL e Max, V IH e Min DM74 2.7 3.4 VOL Low Level Output V CC e Min, I OL e Max DM54 0.25 0.4 Voltage V IL e Max, V IH e Min DM74 0.35 0.5 V IOL e 4 mA, V CC e Min DM74 0.25 0.4 II Input Current @ Max V CC e Max, V I e 7V 0.1 mAInput Voltage IIH High Level Input Current V CC e Max, V I e 2.7V 20 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b0.36 mA IOS Short Circuit V CC e Max DM54 b20 b100 mAOutput Current (Note 2) DM74 b20 b100 ICC Supply Current V CC e Max (Note 3) 6.1 10 mA Note 1: All typicals are at V CC e 5V, T A 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.

’LS155 Switching Characteristics at V CC e 5V and T A e 25§C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 2k X Symbol Parameter To (Output) CL e 15 pF C L e 50 pF Units Min Max Min Max tPLH Propagation Delay Time A, B, C2, G1 18 22 nsLow to High Level Output or G2 to Y tPHL Propagation Delay Time A, B, C2, G1 27 35 nsHigh to Low Level Output or G2 to Y tPLH Propagation Delay Time A or B 18 24 nsLow to High Level Output to Y tPHL Propagation Delay Time A or B 27 35 nsHigh to Low Level Output to Y tPLH Propagation Delay Time C1 20 24 nsLow to High Level Output to Y tPHL Propagation Delay Time C1 27 35 nsHigh to Low Level Output to Y Recommended Operating Conditions Symbol Parameter DM54LS156 DM74LS156 Units Min Nom Max Min Nom Max VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 0.7 0.8 V VOH High Level Output Voltage 5.5 5.5 V IOL Low Level Output Current 4 8 mA TA Free Air Operating Temperature b55 125 0 70 §C ’LS156 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 18 mA b1.5 V ICEX High Level Output V CC e Min, V O e 5.5V 100 mACurrent V IL e Max, V IH e Min VOL Low Level Output V CC e Min, I OL e Max DM54 0.25 0.4 Voltage V IL e Max, V IH e Min DM74 0.35 0.5 V IOL e 4 mA, V CC e Min DM74 0.25 0.4 II Input Current @ Max V CC e Max, V I e 7V 0.1 mAInput Voltage IIH High Level Input Current V CC e Max, V I e 2.7V 20 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b0.36 mA ICC Supply Current V CC e Max (Note 2) 6.1 10 mA Note 1: All typicals are at V CC e 5V, T A 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.

’LS156 Switching Characteristics at V CC e 5V and T A e 25§C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 2k X Symbol Parameter To (Output) CL e 15 pF C L e 50 pF Units Min Max Min Max tPLH Propagation Delay Time A, B, C2, G1 28 53 nsLow to High Level Output or G2 to Y tPHL Propagation Delay Time A, B, C2, G1 33 43 nsHigh to Low Level Output or G2 to Y tPLH Propagation Delay Time A or B 28 53 nsLow to High Level Output to Y tPHL Propagation Delay Time A or B 33 43 nsHigh to Low Level Output to Y tPLH Propagation Delay Time C1 28 53 nsLow to High Level Output to Y tPHL Propagation Delay Time C1 34 43 nsHigh to Low Level Output to Y Logic Diagram TL/F/6395–2

Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier (E) Order Number 54LS155LMQB 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS155DMQB, 54LS156DMQB, DM54LS155J or DM54LS156J

Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS155M or DM74LS156M 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS155N or DM74LS156N

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 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 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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a49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309 Arlington, TX 76017 Email: cnjwge @ tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( a49) 0-180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: ( a49) 0-180-532 78 32 Hong Kong Fran3ais Tel: ( a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: ( a49) 0-180-534 16 80 Fax: (852) 2736-9960 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.