CD74HC257M96 Texas Instruments - Yeehing Electronics

High Speed CMOS Logic Quad 2-Input Multiplexers with Non-Inverting 3-State Outputs

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The ’HC257 and ’HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE) is active LOW. When OE is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regardless of all other input conditions.