74HC257 Quad Data Selector/Multiplexor

These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G) input is at a high logic level. To ensure the high-impedance state during power up or power down, (G) should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Features: Wide Operating Voltage Range of 2 V to 6 V High-Current Inverting Outputs Drive up to 15 LSTTL Loads Low Power Consumption, 80-µA Max ICC Typical tpd = 9 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Provides Bus Interface from Multiple Sources in High-Performance Systems 16 pin DIP. Actual brand may vary from picture.