74HCT240 系列 5.5 V 表面贴装 八路 缓冲器/线路驱动器 三态 反相 - SOIC-20
The is a 8-bit inverting Buffer/Line Driver with inverting 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables 1OE and 2OE, each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.