SN54/74LS151 8-INPUT MULTIPLEXER 8-INPUT MULTIPLEXER FAST AND LS TTL DATA 5-252

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1 8-INPUT MULTIPLEXER The TTL /MSI SN54 /74LS5 is a high speed 8-input Digital Multiplexer. It provides, in one package, the ability to select one bit of data from up to eight sources. The LS5 can be used as a universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided. Schottky Process for High Speed Multifunction Capability On-Chip Select Logic Decoding Fully Buffered Complementary Outputs Input Clamp Diodes Limit High Speed Termination Effects SN54/74LS5 8-INPUT MULTIPLEXER LOW POWER SCHOTTKY CONNECTION DIAGRAM DIP (TOP VIEW) J SUFFIX CERAMIC CASE 6-09 N SUFFIX PLASTIC CASE D SUFFIX SOIC CASE 75B-03 ORDERING INFORMATION PIN NAMES LOADING (Note a) S0 S2 E I0 I7 Z Z Select Inputs Enable (Active LOW) Input Multiplexer Inputs Multiplexer Output (Note b) Complementary Multiplexer Output (Note b) HIGH 0.5 U.L. 0.5 U.L. 0.5 U.L. 0 U.L. 0 U.L. LOW 0.25 U.L U.L U.L. 5 (2.5) U.L. 5 (2.5) U.L. NOTES: a) TTL Unit Load (U.L.) = 40 µa HIGH/.6 ma LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXD SOIC LOGIC SYMBOL 5-252

2 SN54/74LS5 LOGIC DIAGRAM FUNCTIONAL DESCRIPTION The LS5 is a logical implementation of a single pole, 8-position switch with the switch position controlled by the state of three Select inputs, S0, S, S2. Both assertion and negation outputs are provided. The Enable input (E) is active LOW. When it is not activated, the negation output is HIGH and the assertion output is LOW regardless of all other inputs. The logic function provided at the output is: Z = E (I0 S0 S S2 + I S0 S S2 + I2 S0 S S2 + I3 S0 S S2 + I4 S0 S S2 + I5 S0 S S2 + I6 S0 S S2 + I7 S0 S S2). The LS5 provides the ability, in one package, to select from eight sources of data or control information. By proper manipulation of the inputs, the LS5 can provide any logic function of four variables and its negation. TRUTH TABLE E S2 S S0 I0 I I2 I3 I4 I5 I6 I7 Z Z H X X X X X X X X X X X H L L L L L L X X X X X X X H L L L L L H X X X X X X X L H L L L H X L X X X X X X H L L L L H X H X X X X X X L H L L H L X X L X X X X X H L L L H L X X H X X X X X L H L L H H X X X L X X X X H L L L H H X X X H X X X X L H L H L L X X X X L X X X H L L H L L X X X X H X X X L H L H L H X X X X X L X X H L L H L H X X X X X H X X L H L H H L X X X X X X L X H L L H H L X X X X X X H X L H L H H H X X X X X X X L H L L H H H X X X X X X X H L H H = HIGH Voltage Level L = LOW Voltage Level X = Don t Care 5-253

3 SN54/74LS5 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage TA Operating Ambient Temperature Range IOH Output Current High 54, ma IOL Output Current Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter Min Typ Max Unit Test Conditio VIH Input HIGH Voltage 2.0 V VIL Input LOW Voltage V Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage V VCC = MIN, IIN = 8 ma VOH VOL IIH Output HIGH Voltage Output LOW Voltage Input HIGH Current V VCC = MIN, IOH = MAX, VIN = VIH V or VIL per Truth Table 54, V IOL = 4.0 ma VCC = VCC MIN, VIN = VIL or VIH V IOL = 8.0 ma per Truth Table µa VCC = MAX, VIN = 2.7 V 0. ma VCC = MAX, VIN = 7.0 V IIL Input LOW Current 0.4 ma VCC = MAX, VIN = 0.4 V IOS Short Circuit Current (Note ) 00 ma VCC = MAX ICC Power Supply Current 0 ma VCC = MAX Note : Not more than one output should be shorted at a time, nor for more than second. AC CHARACTERISTICS (TA = 25C) Limits Symbol Parameter Min Typ Max Unit Test Conditio Select to Output Z Select to Output Z Enable to Output Z Enable to Output Z Data to Output Z Data to Output Z AC WAVEFORMS VCC = 5.0 V CL = 5 pf V C ma Figure Figure

4 -A- Case 75B-03 D Suffix -Pin Plastic SO B- P -T- D G K C M R X 45 F J -A- Case N Suffix -Pin Plastic 8 9 B F S C -T- L H G D K J M -A- Case 6-09 J Suffix -Pin Ceramic Dual In-Line 9 -B- 8 C L -T- K E N F G J D M 5-255

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