SN65176B: SN65176B Supply Voltage lower than 4.75V

Lenna Yan

Intellectual 1960 points

Part Number: SN65176B
Other Parts Discussed in Thread: THVD1520

Hi，

The recommended supply voltage for SN65176B is 4.75V to 5.25V. What will happen if the voltage is slightly lower than 4.75V for a short time?

over 3 years ago

0 Hao L over 3 years ago

TI__Mastermind 25705 points

Lenna,

How low does the voltage drop and how long is the 'short time'? In general I don't think there is much concern about function and reliability.

Regards,

Hao

0 Lenna Yan over 3 years ago in reply to Hao L

TI__Intellectual 1960 points

Hi Hao,

Here is the test waveform for the VCC voltage. Please check if it may have rick. And what about the supply voltage is 4.5V?

0 Hao L over 3 years ago in reply to Lenna Yan

TI__Mastermind 25705 points

Lenna,

Do you know the reason of voltage dripping? I don't think it would not impact SN65176B operation although. If the voltage goes as low as 4.5V, the device may not be able to meet all the spec on datasheet such as Vod, or some timing spec. BTW, if you're interested, there are many recently released RS-485 transceivers and some are pin 2 pin replacement to SN65176B, like THVD1520.

https://e2e.ti.com/support/interface/f/138/t/849650

Please let me know if you have more questions.

Regards,

Hao

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SN65176B: SN65176B Supply Voltage lower than 4.75V