SIT92216AI-N

Clock Buffers, Drivers Overview

The SiT92216AI-N is a high-performance clock buffer featuring four differential outputs and one LVCMOS output. It supports input frequencies up to 2100 MHz on primary and secondary inputs, with crystal bypass mode supporting up to 250 MHz. The device operates from independent core (VCC) and output (VCCO) supplies of 3.3 V or 2.5 V; HCSL and LVCMOS drivers additionally support 1.8 V operation. Additive jitter is typically 50 fs RMS. Propagation delay ranges from 705 ps to 944 ps depending on output type. The component is housed in a 32-pin, 5 mm x 5 mm QFN package.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter performance of 50 fs RMS typical.
• Supports PCI Express Gen1 through Gen5 standards.
• Features a 3:1 input multiplexer accepting LVPECL, LVDS, LVCMOS, SSTL, HCSL, and OSC waveforms.
• Provides level translation via independent core and output supply voltages.

Clock Buffers, Drivers Applications

• Carrier Ethernet systems
• 5G Wireless Base Stations
• 5G Small Cells

Clock Buffers, Drivers Procurement Notes

Verify the specific suffix 'AI-N' against the manufacturer's current ordering guide to confirm temperature range and packaging details. Ensure the design accounts for independent power supply sequencing requirements if applicable, although the datasheet notes no strict sequencing is required between core and output rails.

Clock Buffers, Drivers Selection Notes

Select this buffer for applications requiring distribution of high-frequency clocks up to 2.1 GHz with minimal jitter addition. Choose based on the required output signaling types (LVPECL, LVDS, HCSL, or LVCMOS) and available supply voltages (3.3 V, 2.5 V, or 1.8 V). Ensure the input source matches one of the supported formats for CLKIN0, CLKIN1, or OSCIN.

Clock Buffers, Drivers Part Context

The SiT92216 belongs to SiTime’s family of ultra-low jitter clock buffers designed for high-speed data distribution. It integrates multiple output driver modes into a single package, reducing board space compared to using separate devices for different logic families like LVPECL and LVCMOS.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's compatibility matrix for direct pin-to-pin replacements.

Clock Buffers, Drivers FAQ

What is the maximum input frequency supported by the SiT92216?

The primary and secondary clock inputs (CLKIN0/CLKIN1) support frequencies from DC to 2100 MHz. The crystal input (OSCIN) supports up to 250 MHz in bypass mode.

Can the SiT92216 operate with mixed voltage supplies?

Yes, the core supply (VCC) and output supplies (VCCOA, VCCOB, VCCOC) are independent. Differential outputs can use 3.3 V or 2.5 V, while HCSL and LVCMOS drivers can additionally operate at 1.8 V.

How is the input clock source selected?

Input selection is controlled by the CLKIN_SEL0 and CLKIN_SEL1 pins, allowing the user to choose between CLKIN0, CLKIN1, or the Crystal/OSCIN input.