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74LS48芯片是一种常用的七段数码管译码器驱动器，常用在各种数字电路和单片机系统的显示系统中，下面我就给大家介绍一下这个元件的一些参数与应用技术等资料。 
74ls48引脚图
| 74ls48功能表—七段译码驱动器功能表 | 十进数
或功能 | 输入 | BI/RBO | 输出 | 备注 | | LT | RBI | D C B A | a | b | c | d | e | f | g | | 0 | H | H | 0 0 0 0 | H | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | | 1 | H | x | 0 0 0 1 | H | 0 | 1 | 1 | 0 | 0 | 0 | 0 | | 2 | H | x | 0 0 1 0 | H | 1 | 1 | 0 | 1 | 1 | 0 | 1 | | 3 | H | x | 0 0 1 1 | H | 1 | 1 | 1 | 1 | 0 | 0 | 1 | | 4 | H | x | 0 1 0 0 | H | 0 | 1 | 1 | 0 | 0 | 1 | 1 | | 5 | H | x | 0 1 0 1 | H | 1 | 0 | 1 | 1 | 0 | 1 | 1 | | 6 | H | x | 0 1 1 0 | H | 0 | 0 | 1 | 1 | 1 | 1 | 1 | | 7 | H | x | 0 1 1 1 | H | 1 | 1 | 1 | 0 | 0 | 0 | 0 | | 8 | H | x | 1 0 0 0 | H | 1 | 1 | 1 | 1 | 1 | 1 | 1 | | 9 | H | x | 1 0 0 1 | H | 1 | 1 | 1 | 0 | 0 | 1 | 1 | | 10 | H | x | 1 0 1 0 | H | 0 | 0 | 0 | 1 | 1 | 0 | 1 | | 11 | H | x | 1 0 1 1 | H | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 12 | H | x | 1 1 0 0 | H | 0 | 1 | 0 | 0 | 0 | 1 | 1 | | 13 | H | x | 1 1 0 1 | H | 1 | 0 | 0 | 1 | 0 | 1 | 1 | | 14 | H | x | 1 1 1 0 | H | 0 | 0 | 0 | 1 | 1 | 1 | 1 | | 15 | H | x | 1 1 1 1 | H | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | BI | x | x | x x x x | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | | RBI | H | L | 0 0 0 0 | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | | LT | L | x | x x x x | H | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 4 |
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