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常见问题
[FAQ] 【信号链分享】常见问题解答(持续更新中, 更新至10/28/2021)
Annie Liu
【信号链分享】常见问题解答(持续更新中, 更新至10/28/2021) 3482.常见问题解答-Signal Chain 2021.docx 【信号链分享】常见问题解答 -2020 2477.常见问题解答-Signal Chain 2020.docx
Answered
over 3 years ago
逻辑
逻辑论坛
[FAQ] 对于 TXS、TXB 器件,能否将 OE 引脚连接到 Vccb 而非 Vcca 电源引脚?
Annie Liu
问:对于 TXS、TXB 器件,能否将 OE 引脚连接到 Vccb 而非 Vcca 电源引脚? 答: OE(输出使能): TXS 和 TXB 器件的输出使能引脚,通常高电平有效,是 CMOS工艺 的高输入阻抗引脚。 OE 参考 Vcca 电源 w.r.t 电压电平,即 Vih 和 Vil 约为 0.7*Vcca 和 0.35*Vcca。 OE 具有过压耐受性,因此可以连接到 Vccb 电源,在大多数情况下,通常高于 Vcca。必须注意确保 OE 引脚保持如上所述的逻辑电平,以确保正常运行。
Answered
over 3 years ago
逻辑
逻辑论坛
[FAQ] 要根据数据表中给定的值估算规格值,最好使用哪种方法?
Annie Liu
关于此问题的一个常见例子是,标准逻辑器件的规格为 1.65V、3V 和 4.5V,但大多数工程师在 1.8V、3.3V 和 5V 下使用器件。 在任何系统中电源都不是完美的 – 它们可能会大幅上升或下降。MOSFET 电阻在电压降低时会增加,因此数据表规格不在标称电源电压值下进行测试,而在比标称值低大约 10% 的条件下进行测试。 为什么不正好是 10% 的原因不明 – 这些值已使用了数十年,并已成为整个行业的标准。 在 5V 时,正好是 10% (0.5V),但在 3.3V…
Answered
over 3 years ago
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Suggested Answer
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Suggested Answer
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27 days ago
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28 days ago
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Answered
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29 days ago
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