TTL电平信号规定，+5V等价于逻辑“1”，0V等价于逻辑“0”(采用二进制来表示数据时)。这样的数据通信及电平规定方式，被称做TTL（晶体管-晶体管逻辑电平）信号系统。这是计算机处理器控制的设备内部各部分之间通信的标准技术。
These BCD-to-decimal decoders/drivers consist of eightinverters and ten, four-input NAND gate
These BCD-to-decimal decoders/drivers consist of eightinverters and ten, four-input NAND gate
These monolithic converters are derived from the 256-bitread only memories, DM5488, and DM7488.
USB驱动安装说明： 1、请先安装驱动程序，然后再插入数据线。 2、如果以前安装过类似驱动，请先用卸载程序卸载，重新启动电脑后再安装新版驱动。 3、由于芯片改版，旧的驱动将无法连接，请务必安装此新版本驱动。
This device contains six independent gates each of whichperforms the logic INVERT function. E
These BCD-to-decimal decoders consist of eight invertersand ten, four-input NAND gates. The i