MONTEREY, Calif. SiTime Corp. announced MEMS oscillator design wins from three unidentified customers, including one order for 1 million units.
All three of the companies make consumer electronics devices, including cellphones. The oscillators will allow the customers to shrink their devices by eliminating bulky quartz crystals from their pc-boards. When SiTime (Sunnyvale, Calif.) adds quartz crystal makers like Micro Crystal (Grenchen, Switzerland) to its customer list, it will boast orders for over 50 million MEMS oscillators.
"We are also receiving significant orders for our standalone MEMS resonator," said Joe Brown, manager of strategic alliances at SiTime. "These orders are coming from customers who already have a [phase- locked loop] working in their design, and just want to eliminate the quartz crystal from their circuit board."
SiTime's oscillators consist of two bonded dieone for the MEMS resonator and a second stacked die for an ASIC holding the PLL and its signal conditioning circuitry. Besides standard stacked-die parts, SiTime now claims to have orders from three major semiconductor makers for custom resonators that will be stacked onto ASICs.
SiTime also announced an integrated oscillator chip that includes a MEMS resonator on the bottom layer of the die and ASIC circuitry fabricated on the top of the same chip.
"Cost wise, it is still cheaper to bond the MEMs die together with the ASIC," said McDonald. "But for some applications it does make sense to integrate both onto the same die. We wanted to demonstrate that we could do that too."