Part Number: ISO1176T
Could you suggest any Schmitt-trigger circuit to control Receiver and transmitter on attached RS485 circuit ?
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In reply to Lucas Schulte9:
In reply to wei liao13:
95_1755t02 v005_1122.pdfHi Lucas,
Thanks for your comments.
I upload my schematics design as attached.
The purpose is to design USB convert to RS-485/RS-422.
The transceiver should be have auto switch TX/RX port with Schmitt-trigger circuit.
on normally, the transceiver should be on RX mode.
when transmit the data, enable TX mode.
once finish Transmitted data, it should be switch to RX mode automatically.
So please help to special review the SN74LVC2G14DCKR circuit design and give me some ideas whether this circuit can implement auto switch TX/RX purpose?
The first schematic you provided involves the ISO1176T but the second utilizes opto couplers and the THVD1552DGSR RS 485 transceiver. Which schematic represents how you are achieving isolated RS 485? Also, did you review the schmitt trigger design from the document i referred to in my previous response?
Is U18 supposed to be the SN74LVC2G14DCKR? It is currently labeled as a 74LVC1G32GW OR gate.
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