SN54/74LS151 8-INPUT MULTIPLEXER The TTL / MSI SN54 / 74LS151 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 LS151 can be used as a universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided. • • • • • 8-INPUT MULTIPLEXER Schottky Process for High Speed Multifunction Capability On-Chip Select Logic Decoding Fully Buffered Complementary Outputs Input Clamp Diodes Limit High Speed Termination Effects LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 16 CONNECTION DIAGRAM DIP (TOP VIEW) 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION PIN NAMES S0 – S2 E I0 – I7 Z Z SN54LSXXXJ SN74LSXXXN SN74LSXXXD LOADING (Note a) Select Inputs Enable (Active LOW) Input Multiplexer Inputs Multiplexer Output (Note b) Complementary Multiplexer Output (Note b) HIGH LOW 0.5 U.L. 0.5 U.L. 0.5 U.L. 10 U.L. 10 U.L. 0.25 U.L. 0.25 U.L. 0.25 U.L. 5 (2.5) U.L. 5 (2.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 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. Ceramic Plastic SOIC LOGIC SYMBOL FAST AND LS TTL DATA 5-252 SN54/74LS151 LOGIC DIAGRAM FUNCTIONAL DESCRIPTION The LS151 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 1, 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 ⋅ S1 ⋅ S2 + ⋅ I1 ⋅ S0 ⋅ S1 ⋅ S2 + I2 ⋅ S0 ⋅ S1 ⋅ S2 + I3 ⋅ S0 ⋅ S1 ⋅ S2 + I4 ⋅ S0 ⋅ S1 ⋅ S2 + I5 ⋅ S0 ⋅ S1 ⋅ S2 + I6 ⋅ S0 ⋅ S1 ⋅ S2 + I7 ⋅ S0 ⋅ S1 ⋅ S2). The LS151 provides the ability, in one package, to select from eight sources of data or control information. By proper manipulation of the inputs, the LS151 can provide any logic function of four variables and its negation. TRUTH TABLE E S2 S1 S0 I0 I1 I2 I3 I4 I5 I6 I7 Z Z H L L L L L L L L L L L L L L L L X L L L L L L L L H H H H H H H H X L L L L H H H H L L L L H H H H X L L H H L L H H L L H H L L H H X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H X X X X X X X X X X X X X X X X X L H H H L H L H L H L H L H L H L H L L L H L H L H L H L H L H L H L H H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care FAST AND LS TTL DATA 5-253 SN54/74LS151 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH IOL Output Current — High 54, 74 – 0.4 mA Output Current — Low 54 74 4.0 8.0 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VIK Input Clamp Diode Voltage VOH Output HIGH Voltage VOL Output LOW Voltage IIH Input HIGH Current IIL IOS Input LOW Current ICC Power Supply Current Min Typ Unit Max 2.0 54 0.7 74 0.8 – 0.65 – 1.5 Test Conditions V Guaranteed Input HIGH Voltage for All Inputs V Guaranteed Input LOW Voltage for All Inputs V VCC = MIN, IIN = – 18 mA 54 2.5 3.5 V 74 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table 54, 74 0.25 0.4 V IOL = 4.0 mA 74 0.35 0.5 V IOL = 8.0 mA 20 µA VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V Short Circuit Current (Note 1) – 20 0.1 mA – 0.4 mA – 100 mA VCC = MAX, VIN = 0.4 V VCC = MAX 10 mA VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Limits Typ Max Unit tPLH tPHL Symbol Propagation Delay Select to Output Z Parameter 27 18 43 30 ns tPLH tPHL Propagation Delay Select to Output Z 14 20 23 32 ns tPLH tPHL Propagation Delay Enable to Output Z 26 20 42 32 ns tPLH tPHL Propagation Delay Enable to Output Z 15 18 24 30 ns tPLH tPHL Propagation Delay Data to Output Z 20 16 32 26 ns tPLH tPHL Propagation Delay Data to Output Z 13 12 21 20 ns Min Test Conditions VCC = 5.0 V CL = 15 pF AC WAVEFORMS Figure 1 Figure 2 FAST AND LS TTL DATA 5-254 Case 751B-03 D Suffix 16-Pin Plastic SO-16 -A- "! ! " " ! " # 1 %# ) ! !" $ !" 8 C -T- D M K " ! #! J F ! Case 648-08 N Suffix 16-Pin Plastic R X 45° G " ! ) #! P ! " " 9 -B- ! 16 & ! ! ° ° ° ° ( ( ( ( "! ! " " ! ! ' " " ! ' ! " # & -A- 16 9 1 8 ! ! $ ! B # ) " ! " # ) !" $ !" ) F L C S -T- K H G M J D " Case 620-09 J Suffix 16-Pin Ceramic Dual In-Line -A- ! ! ! ! ° ° ° ° "! ! " 16 " ) " L K M N J G D " $ " $ ! " " ! ! FAST AND LS TTL DATA 5-255 & # ) !" $ !" ) -T $ " " C F & 8 E ! ! ! " " -B1 & 9 * * ! ! ! ! * * ! ° ° ! ° ° Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. 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Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. ◊ FAST AND LS TTL DATA 5-256