🚀 go-pugleaf

It depends on what hardware platform you have. From what I understand you
aare atually looking for a logic simulator. I have used Mentor Grahpic's
QuickSim for a LSI TTL/ECL design(SPICE can't even converge!). Although we
have to develop our own models in order to detect different voltages hookup
in ECL staggin logic.

The speed is fast for sure but most of the features in SPICE are lost. The
other alternative you might consider is to pertition your design into pieces
and simulate them one by one. Then you may put all the timing information to
a higher level logic design and use logic simulator(like QuickSIM) to check
critical path, etc.

Jinfu Chen -- Currently employedless