TTL to differential converter (STEP / DIR / ENABLE)

More
29 May 2026 06:24 #346724 by Asymmetrisch
Hello everyone,are there any breakout board to convert TTL signals (3.3 V to 5 V) into differential signals for motor controllers?
I found a converter that was specifically made for that, but unfortunately it’s not available in Germany:
www.cnc4pc.com/shop/c72-c72-differential..._hygKwfclSAuFTXaBSfB
 Thanks and best regards,
Gerhard

Please Log in or Create an account to join the conversation.

More
29 May 2026 11:07 #346728 by andrax
du brauchst ein TTL zu RS422 Konverter.
Da gibt es jede Menge bei Amazon

Please Log in or Create an account to join the conversation.

More
29 May 2026 12:25 #346733 by Asymmetrisch
Replied by Asymmetrisch on topic TTL to differential converter (STEP / DIR / ENABLE)
Ah ok, vielen lieben Dank!
Das sind dann die Konverter mit dem MAX490, und hier dann nur TXD, Y und Z (Senden) anschließen, richtig?

Please Log in or Create an account to join the conversation.

More
29 May 2026 12:39 #346734 by andrax
Jupp,
txd = transmid Data
rxd = receive data

du willst ja nur Senden, also txd
Board ist eigentlich egal, z.b. das hier:
Amazon

Please Log in or Create an account to join the conversation.

More
29 May 2026 13:35 #346735 by Asymmetrisch
Replied by Asymmetrisch on topic TTL to differential converter (STEP / DIR / ENABLE)
Gibt es so eine Lösung evtl. auch gleich mit mehreren Kanälen?
Da kommen ja doch einige Module zusammen bei 3 oder 4 Achsen...

Please Log in or Create an account to join the conversation.

More
29 May 2026 17:39 #346742 by PCW
The conversion interface parts depend on the signal levels needed

for RS-422 (going into a line receiver on the drive ) where 3V signals into a load are OK,
any RS422 driver will work (say 26LS31 equivalent for 4 channels/chip)

If you wish to drive optocoupled drive input that expect 5V signals, you would need
a driver with 5V outputs. AFAIK the only 4 channel RS-422 drivers that do this are
the ISL32174,ISL34172 and MAX3042 (The MAX parts are expensive)

Another option for 5V signals is to use a combination of ACT driver chips with inverting
and non-inverting  outputs, say a 74ACT540 and a 74ACT541.

Please Log in or Create an account to join the conversation.

Time to create page: 0.203 seconds
Powered by Kunena Forum