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TXB0108被待测芯片影响,输出信号完全混乱

Other Parts Discussed in Thread: TXB0108, SN74LVC8T245, SN74TVC16222A, TXB0102, TXS0102

我使用TXB0108在CPLD和一个HUB芯片做信号电平转换,+3.3v和+5v转换,其中HUB上有一个DRV/SDA引脚,把TXB0108转换出来的电平完全混乱了,低电平被拉高,导致测试失败。

请问一下TXB0108的输出电流有多大? 怎么得到它最大的驱动能力?还有74TVC能代替TXB0108使用吗,谢谢