4 ms·Actually, he does need Spice if he wants to do layout, and worries about timings.by p1esk 10y agoActually, he does need Spice if he wants to do layout, and worries about timings.dbcurtis 10y agoGah! Who uses Spice for pcb layout? Logic timing anslysis is done with topology tracing tools and pcb simulation is done with transmission line analysis tools.p1esk 10y agoWhat are those tools and are they free?