Hi Both the 1702 and 1701 were the same size. There were originally 4 parts; 1601, 1602, 1701 and 1702. I forget which was which but I think it was that the 160x were syncronous bus and the 1x01's were open collector as compared to 1x02's that were 3state. If anyone cares, I can look it up in my doc's to get it right. By the time the 1702A's came out, I don't think anyone saw the others. Dwight