| ??? 02/12/12 06:38 Modified: 02/12/12 06:40 Read: times Msg Score: +1 +2 Good Answer/Helpful -1 Overrated |
#185846 - Why? Responding to: ???'s previous message |
Why the 5-volt requirement?
Why the preference for through-hole packaging? If the reason for the 5-volt supply is interface requirements, perhaps you should consider using level-shifting buffers. If it's just that you're used to 5 volts, well ... get used to the fact it's easier to use what's current. I recently took on one of the SiLabs 20-pin parts and put it on an adapter, which didn't cost much, so I could wire-wrap a prototype. You'll want to limit your capacitor size, as the parts are so stingy with power that the slow decay with a 10 uF cap at the on-board regulator kept the thing ticking overnight ... I didn't have to reinitialize it, not that it would have been a burden. I was operating the part at nearly 25 MHz, too! Imagine what it would have done with a lower speed-power product. There were just a few other cap's, but the 10 uF was undoubtedly the reservoir. If you really have to have through-hole 5-volt parts, there are still a few of them in production, but they're not that thrifty with power. RE |
