© 2000 Fairchild Semiconductor Corporation DS006396 www.fairchildsemi.comSeptember 1986Revised April 2000DM74LS157 • DM74LS158 Quad 2-Line to 1-Line Data Selectors/MultiplexersDM74LS157 • DM74LS158Quad 2-Line to 1-Line Data Selectors/MultiplexersGeneral DescriptionThese data selectors/multiplexers contain inverters anddrivers to supply full on-chip data selection to the four out-put gates. A separate strobe input is provided. A 4-bit wordis selected from one of two sources and is routed to thefour outputs. The DM74LS157 presents true data whereasthe DM74LS158 presents inverted data to minimize propa-gation delay time.Applications• Expand any data input point• Multiplex dual data buses• Generate four functions of two variables (one variable is common)• Source programmable countersFeatures■ Buffered inputs and outputs■ Typical Propagation TimeDM74LS157 9 nsDM74LS158 7 ns■ Typical Power DissipationDM74LS157 49 mWDM74LS158 24 mW Ordering Code:Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.Connection DiagramsDM74LS157 DM74LS158Order Number Package Number Package DescriptionDM74LS157M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 NarrowDM74LS157SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm WideDM74LS157N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 WideDM74LS158M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 NarrowDM74LS158N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Widewww.fairchildsemi.com 2DM74LS157 • DM74LS158Function TableH = HIGH LevelL = LOW LevelX = Don’t CareLogic DiagramsDM74LS157 DM74LS158Inputs Output YStrobe Select A B DM74LS157 DM74LS158HXXXLHLLLXLHLLHXHLLHXLLHLHXHHL3 www.fairchildsemi.comDM74LS157 • DM74LS158Absolute Maximum Ratings(Note 1)Note 1: The “Absolute Maximum Ratings” are those values beyond whichthe safety of the device cannot be guaranteed. The device should not beoperated at these limits. The parametric values defined in the ElectricalCharacteristics tables are not guaranteed at the absolute maximum ratings.The “Recommended Operating Conditions” table will define the conditionsfor actual device operation.DM74LS157 Recommended Operating ConditionsDM74LS157 Electrical Characteristicsover recommended operating free air temperature range (unless otherwise noted)Note 2: All typicals are at VCC = 5V, TA = 25°C.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.DM74LS157 Switching Characteristicsat VCC = 5V and TA = 25°C Supply Voltage 7VInput Voltage 7VOperating Free Air Temperature Range 0°C to +70°CStorage Temperature Range −65°C to +150°CSymbol Parameter Min Nom Max UnitsVCCSupply Voltage 4.75 5 5.25 VVIHHIGH Level Input Voltage 2 VVILLOW Level Input Voltage 0.8 VIOHHIGH Level Output Current −0.4 mAIOLLOW Level Output Current 8 mATAFree Air Operating Temperature 0 70 °CSymbol Parameter Conditions MinTypMax Units(Note 2)VIInput Clamp Voltage VCC = Min, II = −18 mA −1.5 VVOHHIGH Level Output Voltage VCC = Min, IOH = Max, VIL = Max, VIH = Min 2.7 3.4 VVOLLOW Level VCC = Min, IOL = Max, VIL = Max, VIH = Min 0.35 0.5VOutput Voltage IOL = 4 mA, VCC = Min 0.25 0.4IIInput Current @ Max VCC = Max S or G 0.2mAInput Voltage VI = 7V A or B 0.1IIHHIGH Level VCC = Max S or G 40µAInput Current VI = 2.7V A or B 20IILLOW Level VCC = Max S or G −0.8 mAInput Current VI = 0.4V A or B −0.4IOSShort Circuit Output Current VCC = Max (Note 3) −20 −100 mAICCSupply Current VCC = Max (Note 4) 9.7 16 mAFrom (Input)RL = 2 kΩSymbol ParameterTo (Output)CL = 15 pF CL = 50 pF UnitsMinMaxMinMaxtPLHPropagation Delay TimeData to Y 14 18 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeData to Y 14 23 nsHIGH-to-LOW Level OutputtPLHPropagation Delay TimeStrobe to Y 20 24 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeStrobe to Y 21 30 nsHIGH-to-LOW Level OutputtPLHPropagation Delay TimeSelect to Y 23 28 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeSelect to Y 27 32 nsHIGH-to-LOW Level Outputwww.fairchildsemi.com 4DM74LS157 • DM74LS158DM74LS158 Recommended Operating ConditionsDM74LS158 Electrical Characteristicsover recommended operating free air temperature range (unless otherwise noted)Note 5: All typicals are at VCC = 5V, TA = 25°C.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.DM74LS158 Switching Characteristicsat VCC = 5V and TA = 25°C Symbol Parameter Min Nom Max UnitsVCCSupply Voltage 4.75 5 5.25 VVIHHIGH Level Input Voltage 2 VVILLOW Level Input Voltage 0.8 VIOHHIGH Level Output Current −0.4 mAIOLLOW Level Output Current 8 mATAFree Air Operating Temperature 0 70 °CSymbol Parameter Conditions MinTypMax Units(Note 5)VIInput Clamp Voltage VCC = Min, II = −18 mA −1.5 VVOHHIGH Level VCC = Min, IOH = Max2.7 3.4 VOutput Voltage VIL = Max, VIH = MinVOLLOW Level VCC = Min, IOL = Max0.35 0.5Output Voltage VIL = Max, VIH = Min VIOL = 4 mA, VCC = Min 0.25 0.4IIInput Current @ Max VCC = Max S or G 0.2mAInput Voltage VI = 7V A or B 0.1IIHHIGH Level VCC = Max S or G 40µAInput Current VI = 2.7V A or B 20IILLOW Level VCC = Max S or G −0.8 mAInput Current VI = 0.4V A or B −0.4IOSShort Circuit Output Current VCC = Max (Note 6) −20 −100 mAICCSupply Current VCC = Max (Note 7) 4.8 8 mAFrom (Input)RL = 2 kΩSymbol ParameterTo (Output)CL = 15 pF CL = 50 pF UnitsMin Max Min MaxtPLHPropagation Delay TimeData to Y 12 18 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeData to Y 12 21 nsHIGH-to-LOW Level OutputtPLHPropagation Delay TimeStrobe to Y 17 23 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeStrobe to Y 18 28 nsHIGH-to-LOW Level OutputtPLHPropagation Delay TimeSelect to Y 20 24 nsLOW-to-HIGH Level OutputtPHLPropagation Delay TimeSelect to Y 24 36 nsHIGH-to-LOW Level Output5 www.fairchildsemi.comDM74LS157 • DM74LS158Physical Dimensions inches (millimeters) unless otherwise noted16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 NarrowPackage Number M16Awww.fairchildsemi.com 6DM74LS157 • DM74LS158Physical Dimensions inches (millimeters) unless otherwise noted (Continued)16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm