[en] Architecture of the front-end electronics for the ATLAS muon precision chamber (MDT) is presented. Especially, test results of a prototype TDC chip are described in detail. The chip was fabricated in a 0.3 μm CMOS Gate-Array technology. Measurements of critical elements of the chip such as the PLL, and data buffering circuits demonstrated adequate performance. The effect of gamma-ray irradiation, using a ⁶⁰Co source, and neutron irradiation, were also examined. The test results revealed radiation tolerance adequate for the operation of the circuits in the environment of the ATLAS MDT. Mounting of the front-end electronics to the MDT is scheduled to start in the year 2001