SiTime, the fabless producer of silicon timing systems being spun out of MegaChips, raised $56 million by offering 4.3 million shares at $13, the low end of the range of $13 to $15, to command a market value of $186 million. SiTime plans to list on the Nasdaq under the symbol SITM. Barclays and Stifel acted as lead managers on the deal.