SL74HC251

SL74HC251 8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS The SL74HC251 is identical in pinout to the LS/ALS251. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. The device selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Output Enable pin must be at a low level for the selected data to appear at the outputs. If Output Enable is high, the Y and the Y outputs are in the high-impedance state. This 3-State feature allows the IN74HC251 to be used in bus-oriented systems. Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2.0 to 6.0 V Low Input Current: 1.0 µA High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION SL74HC251N Plastic SL74HC251D SOIC TA = -55° to 125° C for all packages PIN ASSIGNMENT LOGIC DIAGRAM FUNCTION TABLE Inputs A2 X L L L L PIN 16 =VCC PIN 8 = GND H H H H A1 X L L H H L L H H A0 X L H L H L H L H OE H L L L L L L L L Outputs Y Z D0 D1 D2 D3 D4 D5 D6 D7 Y Z D0 D1 D2 D3 D4 D5 D6 D7 D0,D1...D7=the level of the respective D input Z = high-impedance state X = don’t care SLS System Logic Semiconductor SL74HC251 MAXIMUM RATINGS * Symbol VCC VIN VOUT IIN IOUT ICC PD Tstg TL * Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC S...