74LS645中文资料仙童半导体数据手册PDF规格书

General Description

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control (DIR) input. The enable input (G) can be used to disable the device so that the buses are effectively isolated.

特性 Features

■ Bi-directional bus transceivers in high-density 20-pin packages

■ Hysteresis at bus inputs improves noise margins

■ 3-STATE outputs