The ICS307GI-03LF is a dynamic, serially programmable clock source that is flexible and takes up minimal board space and whose output frequencies are programmed via a serial interface port. The device can be programmed during operation, making it ideal for applications where many different frequencies are required. To apply it to space parts, we have performed a total ionizing dose (TID) test for the ICS307GI-03LF serially programmable clock source by using a low-level gamma irradiator with (60)Co gamma-ray sources at the ARTI (Advanced Radiation Technology Institute), which belongs to the KAERI (Korea Atomic Energy Research Institute). The irradiation with gamma-rays was carried out at doses from 0 krad to 100 krad to check the status of the device in terms of frequency and current. In this paper, we report on the TID test results for the ICS307GI-03LF clock source.