SI53303-B-GMR

Clock Buffers, Drivers Overview

The SI53303-B-GMR is a universal fanout clock buffer from the Si5330x family, featuring two independent inputs and ten outputs. It operates within a frequency range of 1 MHz to 725 MHz with an ultra-low typical additive jitter of 50 fs rms. The device supports any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS, alongside flexible output formats selectable via pin strapping. It includes built-in LDOs for high PSRR, synchronous output enable, and optional clock division (/1, /2, /4). The component is housed in a 44-QFN package and functions over an ambient temperature range of –40 °C to +85 °C.

Clock Buffers, Drivers Feature Summary

• Dual input configuration with no internal mux; supports up to 10 differential or 20 single-ended outputs
• Ultra-low additive jitter performance of 50 fs rms
• Universal input termination accepting LVPECL, LVDS, CML, HCSL, and LVCMOS formats
• Flexible output drivers with selectable signal formats (LVPECL, LVDS, LVCMOS, CML, HCSL) per bank
• Built-in LDOs providing high power supply noise rejection

Clock Buffers, Drivers Applications

• Clock distribution networks requiring low jitter
• Redundant clocking systems utilizing dual inputs
• Mixed-signal environments requiring format translation between different clock standards

Clock Buffers, Drivers Procurement Notes

Verify that the specific ordering suffix matches the required tape and reel packaging configuration. Confirm that the application voltage levels align with the supported VDD and VDDOX ranges. Ensure ESD handling procedures are followed due to moisture sensitivity classification.

Clock Buffers, Drivers Selection Notes

Select this part when a dual-input architecture without an internal multiplexer is required. Verify that the target output formats match the available pin-strappable options for Bank A and Bank B. Check if the maximum operating frequency of 725 MHz meets the system requirements.

Clock Buffers, Drivers Part Context

This component belongs to the Si5330x family of universal buffers. Unlike other members such as the SI53301 or SI53302, it lacks an internal 2:1 input multiplexer but provides a dual-input structure suitable for specific redundancy or selection topologies external to the chip.

Clock Buffers, Drivers Replacement Considerations

Direct replacements within the same family include the SI53303-B-GM (tray packaging) or variants with different output counts like the SI53302-B-GM if an internal mux is acceptable.