SI53320-B-GTR

Clock Buffers, Drivers Overview

The SI53320-B-GTR is a low-jitter LVPECL fanout clock buffer from the Si5332x family, manufactured by Skyworks Solutions. It features a 2:1 selectable input multiplexer and provides five LVPECL outputs from any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS. The device operates over a wide frequency range from DC to 725 MHz with typical ultra-low additive jitter of 50 fs rms. Built-in LDOs deliver high PSRR performance, reducing external component requirements. It is housed in a 20-TSSOP package and supports an operating temperature range of –40 to +85 °C.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter of 50 fs rms
• 2:1 Input MUX for selectable clock sources
• Any-format Inputs (LVPECL, LVDS, CML, HCSL, LVCMOS)
• Built-in LDOs for high PSRR performance

Clock Buffers, Drivers Applications

• Clock/data distribution systems
• Redundant clocking applications
• Low-jitter clock tree design

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix 'GTR' against official Skyworks documentation to confirm tape-and-reel packaging details. Confirm RoHS compliance status through the manufacturer's current datasheet revision. Ensure the 20-TSSOP package dimensions match the target PCB footprint requirements before procurement.

Clock Buffers, Drivers Selection Notes

Select this component when a 2:1 input mux and five LVPECL outputs are required within a 20-TSSOP package. The 725 MHz maximum frequency limit distinguishes it from higher-speed variants like the Si53321. Verify that the application can accommodate the single-bank output configuration and does not require independent output enable signals per bank.

Clock Buffers, Drivers Part Context

The SI53320-B-GTR belongs to the Si53320–28 family of fixed-format LVPECL buffers. This family offers various configurations ranging from 2 to 10 outputs. The Si53320 specifically provides a 1-bank/5-output configuration with a 2:1 input mux, designed for cost-sensitive or space-constrained designs requiring universal input compatibility.

Clock Buffers, Drivers Replacement Considerations

Direct pin-compatible replacements within the same package include other Si53320 variants with different frequency ranges or output counts if available. For higher frequency needs, consider the Si53321 (10 outputs) or Si53323 (4 outputs), though these may require package adaptation.