74HC251DB数据手册集成电路（IC）的信号开关多路复用器解码器规格书PDF

描述 Description

8-input multiplexer; 3-state - The 74HC251; 74HCT251 is an 8-bit multiplexer with eight binary inputs (I0 to I7), three select inputs (S0 to S2) and an output enable input (OE). The select inputs select one of the eight binary inputs and route it to the complementary outputs (Y and Y). A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

特性 Features

·Input levels:·For 74HC251: CMOS level
·For 74HCT251: TTL level