I think the 594 and 595 are close enough that you won't have any problems.
so what is the difference between these 2 ICs
I think they're just different enough to cause problems.
Quote from: fungus on Jul 14, 2013, 01:05 pmI think they're just different enough to cause problems.The only difference is one has a tristate buffer. If the OE enable pin is not needed, which it isn't, then the two are identical. Both have an output latch. Both have the same structure if you look at the datasheet:Fig 4. page 3 : http://www.nxp.com/documents/data_sheet/74HC_HCT595.pdfFig 4. page 3 : http://www.nxp.com/documents/data_sheet/74HC_HCT594.pdfSure some pins have different names, but they have the same function:74HC595:DS = Data InSHCP = Shift Clock In!MR = Tie to VDDSTCP = Latch Data!OE = Tie to VSSQ0-Q7 = 8 outputs.74HC594:DS = Data InSHCP = Shift Clock In!SHR = Tie to VDDSTCP = Latch Data!STR = Tie to VDDQ0-Q7 = 8 outputs.In that setup, where is the difference? They will not cause any flickering as both have an additional output register.
Sure some pins have different names, but they have the same function:
Quote from: Tom Carpenter on Jul 14, 2013, 02:35 pmSure some pins have different names, but they have the same function:I think that's what's confusing me - the names are all mixed up.Yep, ignore what I said. It should work.