Interesting. I've got a 180nm mask from a previous job. It's obviously a larger scale than the finished chip. Could be 4x. I think it is from TSCM, circa 2003,

Interesting. I've got a 180nm mask from a previous job. It's obviously a larger scale than the finished chip. Could be 4x. I think it is from TSCM, circa 2003, for mixed signal CMOS.