SiTime clock generators are engineered to deliver high performance and the highest level of clock tree integration by consolidating multiple clock ICs into a single device. Our Cascade™ and Chorus™ MEMS-based clocks take integration a step further by integrating a SiTime resonator inside the clock, eliminating the need for the quartz crystal reference required by traditional clocks.
SiTime MEMS-based clock generators feature up to 4 independent Frac-N PLLs, wide frequency range, low jitter and a rich set of programmable features. By integrating the MEMS resonator, the need for a quartz crystal time reference is eliminated, along with all performance, design, quality and reliability issues associated with traditional quartz-based devices.
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Max. Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
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SiT91211 | 8 single-ended 4 differential | 1 PLL | 150 fs (typ.) | 4x4 mm, 24-pin QFN | ||||
SiT91213 | 8 single-ended 4 differential | 1 PLL | 70 fs (typ.) | 4x4 mm, 24-pin QFN | ||||
SiT95141 | 4 | 10 | 2.1 GHz | 4 PLL 1 time domain | 120 fs | 9x9 mm, 64-pin QFN |
These clock generators feature 4 independent quad fractional PLLs, 4 inputs, up to 12 outputs, wide frequency range from 200 kHz to 2.1 GHz, and a rich set of programmable features in small QFN packages.
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Max. Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
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SiT95210 | 4 | 4 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 7x7 mm, 44-pin QFN | ||
SiT95211 | 4 | 12 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 9x9 mm, 64-pin QFN |
SiTime’s real-time clock (RTC) and calendar device offers dual I2C bus support that allows access for two master devices, such as a CPU and BMC chip. The RTC is optimized for ultra-low power consumption and has a built-in voltage-level detection circuit that detects power status and voltage level.
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Max. Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
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SiT95901 | 1 | 1 | 1 Hz | n/a | n/a | 3x3 mm, 12-pin DFN |