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SN54HC257,SN54HC258,SN74HC257,

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  • 上传时间:2021-06-22
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  • 标      签: Multiplexe

资 源 简 介

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.
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