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公开(公告)号:US6018257A
公开(公告)日:2000-01-25
申请号:US46781
申请日:1998-03-23
申请人: Luong Hung , Gary Hom , Corinna Chiu
发明人: Luong Hung , Gary Hom , Corinna Chiu
IPC分类号: H03K19/003 , H03B1/00
CPC分类号: H03K19/00315
摘要: An output drive circuit enables both 5V and 3V devices to be connected to the same bus, without exposing the 3V devices to damage from the 5V signals on the bus. The 3V devices utilize 3V output drives that are tolerant of the 5V signals on the bus. The tolerance is achieved by a circuit design which adjusts internal voltages depending upon the external voltage on the bus. The internal voltage adjustments prevent transistor voltage limits from being exceeded and hence prevent damage from occurring.
摘要翻译: 输出驱动电路使5V和3V器件能够连接到同一总线,而不会使3V器件暴露在总线上的5V信号上。 3V器件采用3V输出驱动器,可容忍总线上的5V信号。 该公差通过电路设计实现,其根据总线上的外部电压调节内部电压。 内部电压调节可以防止超过晶体管电压限制,从而防止发生损坏。