SIT92110AI

Clock Buffers, Drivers Overview

The SiT92110AI is a 10-output LVCMOS ultra-low jitter clock fan-out buffer designed for high-frequency clock distribution. It features a 3:1 input multiplexer supporting primary, secondary, and crystal sources, with inputs accepting LVPECL, LVDS, LVCMOS, SSTL, HCSL, and XTAL waveforms. The device operates from independent core (VDD) and output (VDDO) supplies ranging from 1.5 V to 3.3 V. Key electrical parameters include an additive jitter of 50 fs RMS, typical output skew of 30 ps, and a maximum output frequency of 250 MHz. It is housed in a 32-pin, 5 mm x 5 mm QFN package.

Clock Buffers, Drivers Feature Summary

• 10 LVCMOS outputs capable of driving 50 Ω series or parallel terminated transmission lines.
• Additive jitter performance of 50 fs RMS with typical output skew of 30 ps.
• Supports level translation between core supply (3.3/2.5/1.8 V) and output supply (3.3/2.5/1.8/1.5 V).
• Universal clock inputs accept LVPECL, LVDS, LVCMOS, SSTL, HCSL, and crystal waveforms.

Clock Buffers, Drivers Applications

• Low jitter, high frequency clock and data distribution systems.
• Driving 50 Ω series or parallel terminated transmission lines.
• Systems requiring independent core and output voltage domains without sequencing requirements.

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm temperature range and packaging details. The 'AI' designation typically indicates industrial temperature range (-40°C to +85°C) and reel packaging, but cross-reference with the latest datasheet revision to ensure accuracy before procurement.

Clock Buffers, Drivers Selection Notes

Select this component when a low-jitter fan-out buffer with multiple input format compatibility is required. Ensure the design supports independent VDD and VDDO power supplies, as no sequencing is needed. Verify that the input signal slew rate meets the minimum requirement of 2 V/ns to maintain optimal jitter performance.

Clock Buffers, Drivers Part Context

The SiT92110 belongs to SiTime's family of ultra-low jitter clock buffers. It is distinct from programmable oscillators like the SiT3521 or fixed-frequency oscillators like the SiT9120, serving specifically as a passive buffer to distribute existing clock signals across multiple loads while maintaining signal integrity.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. When evaluating alternatives, verify compatibility with 32-pin QFN packages and 250 MHz maximum frequency specifications.

Clock Buffers, Drivers FAQ

What is the maximum input frequency supported by the SiT92110?

The maximum input frequency is 250 MHz for LVDS, LVPECL, HCSL, and LVCMOS outputs.

Can the SiT92110 operate with different core and output supply voltages?

Yes, the core supply (VDD) can be 3.3 V, 2.5 V, or 1.8 V, while the output supply (VDDO) can be 3.3 V, 2.5 V, 1.8 V, or 1.5 V. No supply sequencing is required.

How is the output enable function controlled?

Pulling the OE pin LOW forces the outputs to a high-impedance state after four falling edges of the input signal. Pulling OE HIGH enables the outputs within a delay defined by the input clock period.