MC68HRC705J1AC

Can anyone point me to a data sheet for this? It's a 20 pin DIP. It's supposed to be controlling my furnace. Help me quick, I'm freezing.

Is this a uC? I don't see an external crystal.

[edit] It is a Motorola part.

j.

it is a varation of motorola 68hc705
it probably has a built in crystal..