Author Topic: Is there any RS232 transceiver with 10mbps datarate?  (Read 1605 times)

0 Members and 2 Guests are viewing this topic.

Offline muthukural001Topic starter

  • Regular Contributor
  • *
  • Posts: 211
  • Country: in
Is there any RS232 transceiver with 10mbps datarate?
« on: March 26, 2020, 07:56:54 am »
Hello All,

I am looking for a RS232 transceiver with 10mbps datarate...I could not get anything for this...If anyone have come across this, please share.


Thanks,
Muthu
 

Offline greenpossum

  • Frequent Contributor
  • **
  • Posts: 408
  • Country: au
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #1 on: March 26, 2020, 08:19:52 am »
What is it you are trying to make?
 

Offline LateLesley

  • Frequent Contributor
  • **
  • Posts: 322
  • Country: scotland
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #2 on: March 26, 2020, 08:26:47 am »
I think you will struggle with this, as RS 232 is only meant to officially support a speed of 19,600bps.

http://www.soc.napier.ac.uk/~bill/pdf/P_ch16.pdf

There are other standards which would probably be more suited to your needs, like RS-485, which is designed up to 10Mbps.

http://www.rs485.com/rs485spec.html


 

Offline mikeselectricstuff

  • Super Contributor
  • ***
  • Posts: 14117
  • Country: gb
    • Mike's Electric Stuff
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #3 on: March 26, 2020, 08:36:11 am »
At that speed, you need to be using RS485, with a correctly terminated twisted-pair.
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 

Offline AndyC_772

  • Super Contributor
  • ***
  • Posts: 4315
  • Country: gb
  • Professional design engineer
    • Cawte Engineering | Reliable Electronics
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #4 on: March 26, 2020, 08:45:46 am »
If you'd like to learn more, have a look at the data sheet (or even get an eval board) for the Exar SP510.

It's a multi-protocol transceiver that does RS232 as well as a number of other, higher speed standards. You can switch between them with software and observe the differences on the wire with a scope.

https://www.mouser.com/datasheet/2/146/SP510-1166392.pdf

Offline coromonadalix

  • Super Contributor
  • ***
  • Posts: 7013
  • Country: ca
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #5 on: March 26, 2020, 01:49:45 pm »
You have some rs232 who goes up to 1 meg bauds, i have some interfaces who are running at 921600 bauds, i'm trying to sniff out the data.
 

Online coppice

  • Super Contributor
  • ***
  • Posts: 10035
  • Country: gb
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #6 on: March 26, 2020, 02:01:59 pm »
You have some rs232 who goes up to 1 meg bauds, i have some interfaces who are running at 921600 bauds, i'm trying to sniff out the data.
921600 bps is way beyond the RS232C spec, but typically works just fine. Much greater than 1Mbps only works if the drivers have complete disregard for the RS232C spec, as proper slew rate limiting  won't allow such high bit rates through.
 

Online SiliconWizard

  • Super Contributor
  • ***
  • Posts: 15800
  • Country: fr
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #7 on: March 26, 2020, 02:08:36 pm »
At that speed, you need to be using RS485, with a correctly terminated twisted-pair.

I also suggest any RS485 transceiver (that can handle this rate), many available these days.
Or you could also consider LVDS transceivers depending on max. length.
 

Online David Hess

  • Super Contributor
  • ***
  • Posts: 17428
  • Country: us
  • DavidH
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #8 on: March 26, 2020, 05:01:06 pm »
10 Mbit/sec with RS-232 signal levels is possible but it conflicts with the RS-232 standard which requires unterminated singled ended signalling.  There are some UARTs which can operate that fast but they are intended for RS-422 or RS-485.  I do not know of any RS-232 level shifters which support more than 1 or maybe 2 Mbit/sec.
 

Online SiliconWizard

  • Super Contributor
  • ***
  • Posts: 15800
  • Country: fr
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #9 on: March 26, 2020, 05:04:34 pm »
Unless you absolutely can't use some simple twisted pair cable for this, I see no reason not to use RS-485 transceivers anyway. Problem solved for a couple bucks.
 

Online David Hess

  • Super Contributor
  • ***
  • Posts: 17428
  • Country: us
  • DavidH
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #10 on: March 26, 2020, 06:16:05 pm »
Unless you absolutely can't use some simple twisted pair cable for this, I see no reason not to use RS-485 transceivers anyway. Problem solved for a couple bucks.

If you can use twisted pair cable, then you can also use singled ended signalling.  There *are* 10 Mbit/sec and probably higher standards which use single ended signaling like 10-base2.

So what would a practical implementation look like?  Assuming a 100 ohm twisted pair (you are going to need a transmission line for this but it will also work for normal RS-232), I would series or shunt terminate the transmitter side and drive it to +/-5 volts on the receiver side. (1)  The receiver side then has no termination but also sees no reflection, or rather all it sees is the reflection but that reflection is the full +/-5 volts.  Now the cable capacitance which normally limits RS-232 data rate is irrelevant.

But I know of no suitable integrated drives which do that.  I have build discrete drivers before which could.

(1) This means that the series termination requires a +/- 5 volt driver with a peak current of +/- 100 milliamps (actually +/- 50 milliamps) and the shunt termination requires a +/-50 milliamp driver with a voltage compliance of +/- 5 volts.  Now you know why RS-485/RS-422 used such low voltages.
« Last Edit: March 28, 2020, 04:03:21 am by David Hess »
 

Offline jbb

  • Super Contributor
  • ***
  • Posts: 1265
  • Country: nz
Re: Is there any RS232 transceiver with 10mbps datarate?
« Reply #11 on: March 26, 2020, 07:38:10 pm »
What equipment have you got that has 10MBit RS232? Maybe you could copy that...

If you’re making new equipment and want it to feel like RS232, I have found RS422 very good in the past. (RS485 is great, but it’s half duplex and needs different communication software.) It will need twisted pair cables and termination resistors, but that’s not too hard.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf