SI53327-B-GMR

Clock Buffers, Drivers Overview

The SI53327-B-GMR is a low-jitter LVPECL fanout clock buffer from the Si53320–28 family, manufactured by Skyworks Solutions Inc. It features a 2:1 selectable input multiplexer and provides two independent LVPECL outputs distributed across separate power banks. The device supports any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS, operating over a wide frequency range from DC to 1250 MHz. Built-in LDOs deliver high PSRR performance, while independent output enables allow for flexible clock management.

Clock Buffers, Drivers Feature Summary

• 2:1 Input MUX with Any-Format support (LVPECL, LVDS, CML, HCSL, LVCMOS)
• Two independent LVPECL outputs with dual bank power supply configuration
• Ultra-low additive jitter of 50 fs rms typical
• Wide frequency range from DC up to 1250 MHz

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments requiring high PSRR
• Redundant clocking applications utilizing the 2:1 input mux
• Low-jitter clock tree buffering for high-speed digital systems

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer prior to procurement.

Clock Buffers, Drivers Selection Notes

Select this component when a low-jitter LVPECL buffer with dual independent output banks is required. Ensure the input signal format matches the supported universal input options. Verify that the system power supply voltage aligns with the 2.5 V or 3.3 V operating ranges specified in the datasheet.

Clock Buffers, Drivers Part Context

This part belongs to the Si53320–28 family of fixed-format LVPECL buffers. It shares core architectural features such as built-in LDOs and ultra-low jitter characteristics with siblings like the SI53320 and SI53326, but differs in its specific output count and dual-bank power architecture.

Clock Buffers, Drivers Replacement Considerations

The SI53328-B-GM is a parameter-equivalent alternative within the same family, offering similar 2:1 mux functionality and 24-QFN packaging, though it is limited to a maximum frequency of 200 MHz compared to the SI53327's 1250 MHz capability.