SN65HVD10: Auto-grade, UART to RS485 (3.3V level)

Roy Chou1

Genius 16110 points

Part Number: SN65HVD10
Other Parts Discussed in Thread: SN65HVD1780-Q1, THVD1450, THVD1406

Tool/software:

Hi Team,

As title, do we have solution that meet auto-grade, UART to RS485 (3.3V level) feature?

Regards,

Roy

3 months ago

0 Clemens Ladisch 3 months ago

Guru 316880 points

SN65HVD1780-Q1.

Please note that in addition to the TXD and RXD signals, you also need to control the driver's DE signal.

0 Roy Chou1 3 months ago in reply to Clemens Ladisch

TI__Genius 16110 points

Hi Ladisch,

Thank you.

How about THVD1450 if we don't need auto grade?

Regards,

Roy

0 Clemens Ladisch 3 months ago in reply to Roy Chou1

Guru 316880 points

50 Mbps is overkill, and the fast edges can lead to EMI problems.

Here is a search for slow, half-duplex, 3.3-V transceivers: ti.com/interface/rs-485-rs-422/products.html#1065=Half&0nom=3.3;3.3&976max=0.03;0.5 (The THVD1406 has the auto-direction feature.)

0 BOBBY 3 months ago in reply to Roy Chou1

TI__Guru 73061 points

Hi Roy,

As Clemens pointed out we don't have too many RS485 devices that are automotive qualified.

The list of devices can be seen in the link below.

https://www.ti.com/interface/rs-485-rs-422/products.html#-1=Q1%3Bfalse&

You may need 1781 if you need to support 1Mbps. 1780 support sup to 115kbps.

If you don't need automotive qualified devices, you can look at the THVD14xx family. If you need to support 70V shorts, you may even look at the THVD24XX family.

-Bobby

Interface

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SN65HVD10: Auto-grade, UART to RS485 (3.3V level)