TTL to differential converter (STEP / DIR / ENABLE)
- Asymmetrisch
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29 May 2026 06:24 #346724
by Asymmetrisch
TTL to differential converter (STEP / DIR / ENABLE) was created 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
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
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- andrax
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29 May 2026 11:07 #346728
by andrax
Replied by andrax on topic TTL to differential converter (STEP / DIR / ENABLE)
du brauchst ein TTL zu RS422 Konverter.
Da gibt es jede Menge bei Amazon
Da gibt es jede Menge bei Amazon
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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?
Das sind dann die Konverter mit dem MAX490, und hier dann nur TXD, Y und Z (Senden) anschließen, richtig?
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29 May 2026 12:39 #346734
by andrax
Replied by andrax on topic TTL to differential converter (STEP / DIR / ENABLE)
Jupp,
txd = transmid Data
rxd = receive data
du willst ja nur Senden, also txd
Board ist eigentlich egal, z.b. das hier:
Amazon
txd = transmid Data
rxd = receive data
du willst ja nur Senden, also txd
Board ist eigentlich egal, z.b. das hier:
Amazon
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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...
Da kommen ja doch einige Module zusammen bei 3 oder 4 Achsen...
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- PCW
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29 May 2026 17:39 #346742
by PCW
Replied by PCW on topic TTL to differential converter (STEP / DIR / ENABLE)
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.
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.
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