74HCT 系列，NXP高速 CMOS 逻辑 工作电压 4.5 － 5.5 兼容性：输入 TTL、输出 CMOS ### 74HCT 系列
The is an octal high-speed Si-gate CMOS Buffer/Line Driver with 3-state outputs. The 3-state outputs are controlled by the output enable inputs 1OE and 2OE. The device is pin compatible with low power Schottky TTL LSTTL.