HD74HC258

HD74HC258 Quad. 2-to-1-line Data Selectors/Multiplexers (with 3-state outputs) Description The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with bus lines in a bus organized system. When the output control input line is taken high, the outputs of all four multiplexers are sent into a high impedance state. When the output control line is low, the select input chooses whether the A or B input is used. Features High Speed Operation: tpd (Data to Y) = 11 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs Output Control H L L L L Select X L L H H A X L H X X B X X X L H Outputs Y Z H L H L Notes H: high level L : low level X: irrelevant Z: off (high-impedance) state of a 3-state output HD74HC258 Pin Arrangement Select 1A Inputs 1B Outputs 1Y 2A Inputs 2B Outputs 2Y GND 1 2 3 4 5 6 7 8 1A 1B 1Y 2A 2B 2Y 3Y S G 4A 4B 4Y 3A 3B 16 VCC 15 Output cotrol 14 4A Inputs 13 4B 12 4Y 11 3A Inputs 10 3B 9 3Y Output Output (Top view) Absolute Maximum Ratings Item Supply voltage range Input voltage Output voltage DC current drain per pin DC current drain per VCC, GND DC input diode current DC output diode current Power dissipation per package Storage temperature Symbol VCC VIN VOUT I OUT I CC, I GND I IK I OK PT Tstg Rating –0.5 to +7.0 –0.5 to VCC + 0...