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SN65HVD251: 作为Driver时R跟随D波形

Part Number: SN65HVD251
Other Parts Discussed in Thread: SN74LV1T126

https://e2e.ti.com/support/interface-group/interface---internal/f/interface---internal-forum/1304545/sn65hvd251-can-bus-oscillation-and-rxd-abnormal-behavior

大家好,

由于TRX BU都休假了,我把这个问题转发到中文论坛。

客户使用SN65HVD251遇到两个问题:

1. 在SN65HVD251的引脚R(RXD),D(TXD)后连接SN74LV1T126后CAN总线会产生振荡,去掉SN74LV1T126后总线正常;

2. 在附件中的原理图中只要SN65HVD251作为driver R脚就会跟随D脚信号变化,正常情况应该是R脚电平常高吧。

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