>> labeled as such on the '74-ME data sheet. And they are on opposite sides >> of the chip, too, which is curiouser and curiouser. >> >Texas Instruments used to package their logic with multiple ground and >power pins centred on the package (much like the '74). This allows >shorter trace runs to the decoupling capacitors (instead of the 5.5cm >runs required in a 40 pin DIP). I meant that AVss and AVdd are on opposite sides of the chip. "Normally" they are very close together for bypass reasons. Oh well. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================