带失效保护的LVDS芯片悬空时该为高吧?
想用双通道的 DS90LV049 实现 LVTTL <--> LVDS 的转换。DS90LV049的datasheet介绍其带有失效保护。The LVDS input buffers have internal failsafe biasing that places the outputs to a known H (high) state for floating receiver inputs.
现在实际测量发现,LVDS_RX输入端悬空时,输出并不为高电平。而是无论是否外接100欧姆终结电阻,始终都是RX1通道输出高电平,RX2通道输出低电平。困惑...
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