Thanks, Frank! HC is my choice unless I need to interface with TTL and it seems to be easier to find; the higher speed of AC isn't really relevant here.
But it seems that there's a new 'TTL' family every month ... ;-) ----- Original Message ----- From: "Francesco Messineo" <[email protected]> To: <[email protected]> Sent: Tuesday, January 29, 2019 11:08 AM Subject: Re: [M100] Installing 8K modules in M100 > Hi Mike, > I use HC, sometimes I've used AHC when I needed some single gate ICs. > 74AC logic has a low standby current, but current surges during the > fast edges make a lot of additional noise and power rail bouncing. May > be or maybe not a problem, but why taking chances? > 8K modules with only HC/AHC logic and suitable RAM chip usually end up > in the 0.1 to 3 uA standby current @3.3V. > My setup lower current limit is 0.1uA, so many modules I've checked > may have been better than that. > > On Tue, Jan 29, 2019 at 4:53 PM Mike Stein <[email protected]> wrote: >> >> >> ----- Original Message ----- >> From: "Francesco Messineo" <[email protected]> >> To: <[email protected]> >> Sent: Tuesday, January 29, 2019 2:50 AM >> Subject: Re: [M100] Installing 8K modules in M100 >> >> >> > ...HCT logic should not be used for M100 hardware (it works correctly, but >> > power needed is unnecessarily higher) >> >> > Frank IZ8DWF >> ---------- >> >> Thanks for the tip; which logic family do you recommend instead? >> >> m
