>7$ for a 84 pin PLD (clear logic) translates to >about 8c per output. About double than >using 595 shift registers. >Is it so ? Any cheaper alternative ? Do not forget to factor in assembly costs, which will be significant for that number of 595 devices, and could soon get you to the programmed/assembled PLD cost. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu