DM74LS157/DM74LS158 Quad 2-Line to 1-Line Data Selectors/Multiplexers General Description n Source programmable counters These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The LS157 presents true data whereas the LS158 presents inverted data to minimize propagation delay time. Features Applications n Expand any data input point n Multiplex dual data buses n Generate four functions of two variables (one variable is common) n Buffered inputs and outputs n Typical Propagation Time LS157 9 ns LS158 7 ns n Typical Power Dissipation LS157 49 mW LS158 24 mW Connection Diagrams Dual-In-Line Package Dual-In-Line Package DS006396-2 DS006396-1 Order Number 54LS158DMQB, 54LS158FMQB, 54LS158LMQB, DM54LS158J, DM54LS158W, DM74LS158M or DM74LS158N See Package Number E20A, J16A, M16A, N16E or W16A Order Number 54LS157DMQB, 54LS157FMQB, 54LS157LMQB, DM54LS157J, DM54LS157W, DM74LS157M or DM74LS157N See Package Number E20A, J16A, M16A, N16E or W16A Function Table Inputs Output Y Strobe Select A B LS157 LS158 H X X X L H L L L X L H L L H X H L L H X L L H L H X H H L H = High Level, L = Low Level, X = Don't Care (c) 1998 Fairchild Semiconductor Corporation DS006396 www.fairchildsemi.com DM74LS157/DM74LS158 Quad 2-Line to 1-Line Data Selectors/Multiplexers March 1998 Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range DM54LS and 54LS DM74LS Storage Temperature Range 7V 7V -55C to +125C 0C to +70C -65C to +150C Recommended Operating Conditions Symbol Parameter DM54LS157 DM74LS157 Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage 0.7 0.8 V IOH High Level Output Current -0.4 -0.4 mA IOL Low Level Output Current 8 mA TA Free Air Operating Temperature 70 C 2 2 V 4 -55 125 V 0 Note 1: 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. 'LS157 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units -1.5 V (Note 2) VI Input Clamp Voltage VOH High Level Output Voltage VOL Low Level Output Voltage Input Current @ Max II Input Voltage IIH High Level Input Current IIL Low Level Input Current IOS Short Circuit Output Current ICC Supply Current VCC = Min, II = -18 mA VCC = Min, IOH = Max VIL = Max, VIH = Min VCC = Min, IOL = Max VIL = Max, VIH = Min IOL = 4 mA, VCC = Min DM54 2.5 3.4 DM74 2.7 3.4 V DM54 0.25 DM74 0.35 0.4 0.5 DM74 0.25 0.4 VCC = Max VI = 7V VCC = Max S or G 0.2 A or B 0.1 S or G 40 VI = 2.7V VCC = Max A or B 20 S or G -0.8 A or B -0.4 VI = 0.4V VCC = Max (Note 3) VCC = Max (Note 4) DM54 -20 -100 DM74 -20 -100 9.7 16 V mA A mA mA mA Note 2: All typicals are at VCC = 5V, TA = 25C. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 4: ICC is measured with 4.5V applied to all inputs and all outputs open. 'LS157 Switching Characteristics at VCC = 5V and TA = 25C RL = 2 k From (Input) Symbol Parameter To (Output) CL = 15 pF Min tPLH tPHL Propagation Delay Time Data Low to High Level Output to Y Propagation Delay Time Data High to Low Level Output to Y www.fairchildsemi.com 2 Max CL = 50 pF Min Units Max 14 18 ns 14 23 ns 'LS157 Switching Characteristics (Continued) at VCC = 5V and TA = 25C RL = 2 k From (Input) Symbol Parameter CL = 15 pF To (Output) Min tPLH Propagation Delay Time Strobe Low to High Level Output tPHL Propagation Delay Time Strobe Units Max 20 24 ns 21 30 ns 23 28 ns 27 32 ns to Y Propagation Delay Time Select Low to High Level Output tPHL Min to Y High to Low Level Output tPLH CL = 50 pF Max to Y Propagation Delay Time Select High to Low Level Output to Y Recommended Operating Conditions Symbol Parameter DM54LS158 DM74LS158 Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage 0.7 0.8 V IOH High Level Output Current -0.4 -0.4 mA IOL Low Level Output Current 8 mA TA Free Air Operating Temperature 70 C 2 2 V 4 -55 125 V 0 'LS158 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units -1.5 V (Note 5) VI Input Clamp Voltage VOH High Level Output Voltage VOL Low Level Output Voltage Input Current @ Max II Input Voltage IIH High Level Input Current IIL Low Level Input Current IOS Short Circuit Output Current ICC Supply Current VCC = Min, II = -18 mA VCC = Min, IOH = Max VIL = Max, VIH = Min VCC = Min, IOL = Max VIL = Max, VIH = Min IOL = 4 mA, VCC = Min DM54 2.5 3.4 DM74 2.7 3.4 V DM54 0.25 DM74 0.35 0.4 0.5 DM74 0.25 0.4 VCC = Max VI = 7V VCC = Max S or G 0.2 A or B 0.1 S or G 40 VI = 2.7V VCC = Max A or B 20 S or G -0.8 A or B -0.4 VI = 0.4V VCC = Max (Note 6) VCC = Max (Note 7) DM54 -20 -100 DM74 -20 -100 4.8 8 V mA A mA mA mA Note 5: All typicals are at VCC = 5V, TA = 25C. Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 7: ICC is measured with 4.5V applied to all inputs and all outputs open. 3 www.fairchildsemi.com 'LS158 Switching Characteristics at VCC = 5V and TA = 25C RL = 2 k From (Input) Symbol Parameter To (Output) CL = 15 pF Min tPLH tPHL tPLH Propagation Delay Time Data Low to High Level Output to Y Propagation Delay Time Data High to Low Level Output to Y Propagation Delay Time Low to High Level Output tPHL Propagation Delay Time High to Low Level Output tPLH Propagation Delay Time Low to High Level Output tPHL Propagation Delay Time High to Low Level Output Strobe Max CL = 50 pF Min Units Max 12 18 ns 12 21 ns 17 23 ns 18 28 ns 20 24 ns 24 36 ns to Y Strobe to Y Select to Y Select to Y Logic Diagrams LS157 LS158 DS006396-4 DS006396-3 www.fairchildsemi.com 4 5 Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Leadless Chip Carrier Package (E) Order Number 54LS157LMQB or 54LS158LMQB Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS157DMQB, 54LS158DMQB, DM54LS157J or DM54LS158J Package Number J16A www.fairchildsemi.com 6 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS157M or DM74LS158M Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS157N or DM74LS158N Package Number N16E 7 www.fairchildsemi.com DM74LS157/DM74LS158 Quad 2-Line to 1-Line Data Selectors/Multiplexers Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54LS157FMQB, 54LS158FMQB, DM54LS157W or DM54LS158W Package Number W16A LIFE SUPPORT POLICY FAIRCHILD'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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and (c) whose device or system, or to affect its safety or effectiveness. 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. Fairchild Semiconductor Corporation Americas Customer Response Center Tel: 1-888-522-5372 www.fairchildsemi.com Fairchild Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 8 141-35-0 English Tel: +44 (0) 1 793-85-68-56 Italy Tel: +39 (0) 2 57 5631 Fairchild Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. 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