Last modified Feb. 4, 2005
Multi-Hit TDC chip with 250ps RMS resolution fabricated in CMOS 0.35um process.
TMC-304 Trouble Reports (PDF 66kB).
You can also get TMC-TEG3 paper (PDF file 250 kB) "A Time Digitizer CMOS Gate-Array with a 250 ps Timing Resolution" which was published in IEEE Solid-State Circuit, Feb. 1996.