| Document And Entity Information | May 04, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 4, 2022 |
| Entity Registrant Name | SITIME Corp |
| Entity Central Index Key | 0001451809 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-39135 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 02-0713868 |
| Entity Address, Address Line One | 5451 Patrick Henry Drive |
| Entity Address, City or Town | Santa Clara |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95054 |
| City Area Code | (408) |
| Local Phone Number | 328-4400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | SITM |
| Security Exchange Name | NASDAQ |
