>2. Most reset chips or supervisors (that I found anyway) do not recommend >this low of a resistance (820 ohms) for reset lines. They cannot handle the >current draw. I've had good luck with the Microchip MCP130 series and the Dallas/Maxim DS1811. I have an older design using a MAX691, but that might be marginal at 5V--reset pin spec is 7mA typ, 20mA max. All the designs have the 820 ohm reset pullup, of course! I was severely burnt by a '707 (not Maxim) chip on an HC11 run once...none of the 100 boards would work, and it turns out that they were actually '807 silicon marked as '707 devices! The manufacturer didn't want to believe me, until I faxed the pages from my lab notebook and sent some of the chips to 'em. Got a fresh tube of factory tested parts for my trouble. newell
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RE: [68300] Connecting to 332
2003-06-19 by Scott Newell
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