I'm just tired of Erik's attacks on people who don't want to do things HIS way. The fact is, that RS232 receivers don't need a negative supply. They don't even use it when it's available. The spec's on the MAX-series support this notion though they don't explicitly say so. When challenged, Erik said the negative supply improves noise margins, and, while I can envision a way in which it might, the fact that it's not done suggests it's unnecessary.

It's all about the fact that he's always got to impose his will on others he feels he can bully into doing things HIS way.

I recently told a youngster, that, once one reaches his late 40's, he knows about the same amount as others who have also reached that age. He may not know the same things, but he knows about as much. For that reason, it's important that persons having reached a "certain age" be willing to share and discuss, and give up the fight over who's right. Openly and constructively sharing information will enhance everyone's knowledge. Aggressively advocating for one's own view, particularly if it's at the cost of suppressing someone else's view, is not helpful. This is made worse if one promulgates views unsupported by facts.

As I've said, this topic, receiving RS232 signals, started with a question about in-situ programming of 805x devices. Sadly, the hundreds of lines of senseless argument over something irrelevant has watered-down whatever wisdom Erik's had to contribute, and reduced the overall value of comments he's made in the past and will make in the future.

Yes, the standard is what it is. I'd be really pleased if people would actually read and attempt to understand it. The 1489 was, for over 25 years, THE standard RS232 receiver. Clearly, Erik had not previously encountered it. He's apparently operated all his life under the assumption that one had to use a MAX-series device with its internally-generated bipolar supplies. That's just not the case.

RE