SI53302-B-GMR

Clock Buffers, Drivers Overview

The SI53302-B-GMR is a universal fanout clock buffer featuring a 2:1 input multiplexer and ten configurable 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 delivers ultra-low additive jitter with typical performance of 50 fs rms. It incorporates built-in low-dropout regulators (LDOs) for high power supply rejection ratio (PSRR). The component operates on independent core (VDD) and output (VDDOX) supplies ranging from 1.71 V to 3.63 V. It is housed in a 44-QFN package and functions within an ambient temperature range of –40 °C to +85 °C.

Clock Buffers, Drivers Feature Summary

• Universal Any-Format Input: Accepts LVPECL, LVDS, CML, HCSL, and LVCMOS signals.
• 2:1 Input Mux: Provides selectable input clock sources with glitchless switching capabilities.
• Ultra-Low Jitter: Achieves typical additive jitter of 50 fs rms.
• Flexible Output Configuration: Supports up to 10 differential or 20 single-ended outputs with format translation.

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments requiring high PSRR.
• Redundant clocking systems utilizing the 2:1 input mux.
• End-to-end clock tree designs paired with Si534x synthesizers.

Clock Buffers, Drivers Procurement Notes

Verify the 'R' suffix indicates tape and reel packaging as per the ordering guide. Confirm the specific voltage requirements for VDD and VDDOX domains match the application design. Ensure ESD precautions are taken due to moisture sensitivity classification.

Clock Buffers, Drivers Selection Notes

Select this model when ten outputs are required alongside dual-input redundancy. Verify that the input signal formats (LVPECL, LVDS, etc.) align with the universal input termination capabilities. Check if the 1 MHz minimum frequency requirement for synchronous features meets the system's operational needs.

Clock Buffers, Drivers Part Context

This part belongs to the Si5330x family of ultra-low additive jitter fanout buffers. It shares functional similarities with the Si53301 and Si53305 but offers a higher output count of ten compared to the six outputs of the Si53301.

Clock Buffers, Drivers Replacement Considerations

Si53302-B-GM is the tray-packaged equivalent. Si53305-B-GM provides similar functionality with ten outputs but lacks the 2:1 input mux feature found in the Si53302.

Clock Buffers, Drivers FAQ

What is the minimum input clock frequency required for glitchless switching?

A minimum input clock frequency of 1 MHz is required for glitchless switching and synchronous output enable features.

How does the device handle unused outputs?

Unused outputs should be left unconnected to ensure proper operation.

Can the device support LVCMOS inputs at 1.8 V?

No, LVCMOS clock input is not supported when the core supply VDD is 1.8 V; it requires 2.5 V or 3.3 V.