SIT92211AI

Clock Buffers, Drivers Overview

The SiT92211 is a 2.1 GHz, 10-output ultra-low jitter clock fan-out buffer designed for high-frequency clock distribution and level translation. It features two universal differential or single-ended clock inputs supporting up to 2.1 GHz, one crystal input (8–50 MHz), and one synchronized LVCMOS output. The device distributes the selected clock to two independent output driver banks (A and B) with ten differential outputs total. Additive jitter performance is 55 fs RMS. It operates from 3.3 V/2.5 V core and output supplies, with the LVCMOS driver supporting 1.8 V.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter of 55 fs RMS across all output modes.
• Supports 2.1 GHz maximum input frequency with three selectable clock sources.
• Ten differential outputs configurable as LVPECL, LVDS, HCSL, or Hi-Z via pin control.
• Integrated LVCMOS output synchronized to the selected clock source.

Clock Buffers, Drivers Applications

• PCI Express Gen1 through Gen5 clock distribution
• High-speed data communication systems
• Telecommunications infrastructure

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature range. Ensure supply voltage requirements match the design specifications for both core and output domains before procurement.

Clock Buffers, Drivers Selection Notes

Select this component when low jitter (<60 fs) and high frequency (up to 2.1 GHz) are critical. Ensure the application supports the required 48-pin QFN package dimensions. Verify that the output load impedance matches the termination requirements for the chosen signaling standard (LVPECL, LVDS, or HCSL).

Clock Buffers, Drivers Part Context

The SiT92211 belongs to SiTime's high-performance clock buffer family. It is engineered to replace traditional discrete buffering solutions by integrating multiple output drivers and selection logic into a single MEMS-compatible silicon device, reducing board space and component count.

Clock Buffers, Drivers Replacement Considerations

Direct pin-to-pin replacements are not publicly confirmed for this specific part number. Evaluate alternative buffers based on output count, jitter specifications, and package compatibility if substitution is required.