| Microclock | ||||
| Chipset Number | Frequency | FOX Specs | FOX Thru Hole Packages | FOX SMD Packages |
| ICS501 | 5 - 27 MHZ | 50/100/0/70/18 | HC49U, HC49S, | HC49SD, FPX, FE |
| 2 - 50 MHz | Standard | F5C-2E, H5C-2E, F5C-2E3, H5C-2E3 | KFO90AT, F3345, F4100 | |
| ICS502 | 5 - 27 MHZ | 50/100/0/70/18 | HC49U, HC49S, | HC49SD, FPX, FE |
| 2 - 50 MHz | Standard | F5C-2E, H5C-2E, F5C-2E3, H5C-2E3 | KFO90AT, F3345, F4100 | |