MC74AC251

( DataSheet : www.DataSheet4U.com ) MC74AC251 MC74ACT251 8ĆInput Multiplexer with 3ĆState Outputs The MC74AC251/74ACT251 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. It can be used as a universal function generator to generate any logic function of four variables. Both true and complementary outputs are provided. Multifunctional Capability On-Chip Select Logic Decoding Inverting and Noninverting 3-State Outputs Outputs Source/Sink 24 mA ′ACT251 Has TTL Compatible Inputs VCC 16 I4 15 I5 14 I6 13 I7 12 S0 11 S1 10 S2 9 N SUFFIX CASE 648-08 PLASTIC 8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS 1 I3 2 I2 3 I1 4 I0 5 Z 6 Z 7 OE 8 GND D SUFFIX CASE 751B-05 PLASTIC PIN NAMES S0–S2 OE I0–I7 Z Z Select Inputs 3-State Output Enable Input Multiplexer Inputs 3-State Multiplexer Output Complementary 3-State Multiplexer Output LOGIC SYMBOL S0 OE I0 I1 I2 I3 I4 I5 I6 I7 S1 S2 Z Z TRUTH TABLE Inputs OE H L L L L L L L L S2 X L L L L H H H H S1 X L L H H L L H H S0 X L H L H L H L H Outputs Z Z I0 I1 I2 I3 I4 I5 I6 I7 Z Z I0 I1 I2 I3 I4 I5 I6 I7 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance www.DataSheet4U.com www.DataSheet4U.com FACT DATA 5-1 MC74AC251 MC74ACT251 FUNCTIONAL DESCRIPTION This device is a logical implementation of a single-pole, 8-position switch with the switch position controlled by the state of three Select inputs, S0, S1, S2....