Based on your limited information, the CD4060 would be a better choice than the 555, but if this is automotive, industrial, or some other less than ideal environment, things get complicated real fast regardless of the parts used:
Please view in a fixed-width font such as Courier.
. . . . .12VDC >---+-------+----------------------+---+---+---o------v N.O. . | | | | | ------o---> . | +--------. | | | --------- . | | | | | +--|\ \ \ \ \|--. . | | | | | | + --------- - | . | --- | | | | 12VDC | . | --- 0.22u | | | | | . | | X7R | | | |1N4148 | . | --- | | | '--||--+ | | --- | /// . | | | | /// | . --- [10K] | [33K] | . /// | ----------------------- | | . | | VDD | | | . | | | | |/ . +------|RST CD4060 Q14|-+-||-+--| 2N3904 . | | | | 2x 1N4148 | |> . [220K] | ---- | | [10K] | . | |Phi1 Phi0 Phi0 GND| | | | . | ---------+------------- | '----+ . --- | | | | | --- . /// | | | --- | /// . | | | /// | . +-------|------|--|