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Can I use a SN75176BP comm chip as a replacement in a Synergy system?

You cannot use the SN76176 chip as a replacement. The 75176 is a unit load comm chip with no overvoltage protection.  We use the  LT1785  because it is a 1/4 load and is protected against up to 60V on the data wires.  We used to use the 75176 years ago, but changed because the LT1785 is more robust and allows more controllers or stations on a network.

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