SI53303-B-GM

Clock Buffers, Drivers Overview

The SI53303-B-GM is a universal fanout clock buffer from the Si5330x family, featuring two independent input channels and ten differential outputs. It supports any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS across a frequency range of 1 MHz to 725 MHz. The device provides ultra-low additive jitter of 50 fs rms and includes built-in LDOs for high power supply rejection ratio (PSRR). It operates on dual supplies: VDD (1.8 V, 2.5 V, or 3.3 V) and independent VDDO banks (1.8 V, 2.5 V, or 3.3 V), housed in a 44-QFN package.

Clock Buffers, Drivers Feature Summary

• Dual 1:5 configuration with no input mux
• Universal any-format input support (LVPECL, LVDS, CML, HCSL, LVCMOS)
• Ultra-low additive jitter of 50 fs rms typical
• Built-in LDOs for high PSRR performance
• Synchronous output enable per bank

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments
• Redundant clocking systems
• Format/level translation between different clock standards

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm packaging options. The standard 'GM' suffix indicates a tray package, while an 'R' suffix denotes tape and reel. Ensure compatibility with the required voltage levels and output formats before procurement.

Clock Buffers, Drivers Selection Notes

Select this component when a dual-input, ten-output buffer is required without the need for an internal input multiplexer. It is suitable for applications demanding low jitter and flexible input/output format translation. Verify that the application does not require glitchless switching, as this feature is not available in the Si53303 variant.

Clock Buffers, Drivers Part Context

The SI53303-B-GM belongs to the Si5330x family of ultra-low additive jitter fanout buffers. This family offers various configurations ranging from single-input to dual-input buffers with up to 10 outputs. The Si53303 specifically provides two independent 1:5 buffers, allowing for separate clock source management without cross-channel interference via a mux.

Clock Buffers, Drivers Replacement Considerations

For direct functional replacement within the same family, consider the SI53302-B-GM which offers a 2:10 configuration with an input mux, or the SI53305-B-GM for a similar 2:10 layout. Ensure the replacement part meets the specific output count and input selection requirements of the design.