SiT95141

The Cascade™ SiT95141 is a single-chip MEMS clock generator optimized for the highest level of clock tree integration. This clock-system-on-a-chip (ClkSoC) consolidates multiple clock ICs and oscillators into a single device. Its low noise quad-PLL architecture and programmable output drivers provide up to 10 differential or 20 LVCMOS low-jitter clock outputs. It supports 4 additional clock inputs with Frac-N dividers, enabling virtually any input-to-output frequency translation configurations from 8 kHz to 2.1 GHz.

This clock generator integrates SiTime’s third-generation ApexMEMS™ resonator. This integrated MEMS approach eliminates the traditional clock dependency on crystal reference and quartz related issues, and improves system robustness:

• Always accurate clock synthesis by eliminating crystal capacitive mismatch
• Always reliable startup even at cold temperature and in other harsh environmental conditions
• No jitter degradation because of noise coupling onto a crystal interface
• No activity dips/frequency jumps inherent with quartz
• 10x more resistant to vibration and board bending

The SiT95141 is supported by TimeMaster™ software that simplifies clock tree design. The device can also be shipped with a user-specified, factory pre-programmed default startup configuration. The device configuration can be re-programmed twice using two banks of one-time-programmable (OTP) memory during manufacturing or configured in-system via I2C/SPI for additional BOM flexibility.