SN74HCT257N

TEXAS INSTRUMENTS  SN74HCT257N  逻辑芯片, 四路2:1数据选择器/复用器, 16DIP

The is a 2-to-1 quadruple Data Selector/Multiplexer with 3-state outputs. It is 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 OE\ input is at the high logic level. To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pull-up resistor, the minimum value of the resistor is determined by the current-sinking capability of the driver.

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Typical tpd = 17ns

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Inputs are TTL-voltage compatible

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Provide bus interface from multiple sources in high-performance systems

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Buffered inputs and outputs

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80µA Maximum low power consumption

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±6mA Output drive at 5V

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1µA Maximum low input current