Maybe. The 555 was not patented, so many of the today's chip designs are not exact second sources. A while ago there was a thread (or an off-topic bit in a thread) that got into nitty-gritty operational details never clarified on the datasheet, such as which input pin overrides which. SO parts are a real pain to prototype with, but I suggest you verify who overrides whom before committing to fiberglass.The threshold pin 'takes precedence over the trigger'
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