=20 > I'm using a 3.6688MHz HC49/3U can that is about a 1/4 the=20 > height of a full > HC49/U can. Mine came from CMAC. I get mine from Farnell. =20 > This is then about a suitable size for having on a surface mount board > unless your packing the boards real tight against each other. I pack my boards apart with 4mm spacers/connectors. Tight fit as the = Xtals are 4.3mm but generally the connectors give a little. No problems = so far. In fact all my circuits are SMT now (PCBs made by Tsvetan Usunov = at Olimex which I must highly recommend for a fast and efficient = results) The connectors are also available from Farnell www.farnell.com regards Pete -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads