SI53308-B-GM

Clock Buffers, Drivers Overview

The SI53308-B-GM is a dual 1:3 universal clock buffer from the Si5330x family, designed for low-jitter clock distribution. It features two independent input channels and six outputs (three per bank) in a 32-QFN package. The device supports any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS across a frequency range of 1 MHz to 725 MHz. Key specifications include an additive jitter of 50 fs rms, built-in LDOs for high PSRR, and synchronous output enable capabilities. It operates on core supplies of 1.8 V, 2.5 V, or 3.3 V with independent output supply rails.

Clock Buffers, Drivers Feature Summary

• Dual 1:3 configuration with independent Bank A and Bank B outputs
• Universal input support for LVPECL, LVDS, CML, HCSL, and LVCMOS formats
• Ultra-low additive jitter performance of 50 fs typical
• Built-in LDOs providing high power supply noise rejection

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments requiring high PSRR
• Redundant clocking systems utilizing independent input banks
• Format translation between different clock signal standards

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm packaging options. The standard designation implies tray packaging, while an 'R' suffix indicates tape and reel availability. Confirm RoHS compliance status directly with the supplier as regulatory details may vary by production batch.

Clock Buffers, Drivers Selection Notes

Select this component when a dual-bank architecture with three outputs per bank is required. Ensure the application utilizes differential inputs for optimal jitter performance, as single-ended inputs may increase the noise floor. Verify that the input clock slew rate meets the minimum recommendation of 0.75 V/ns for differential formats to maintain specified timing characteristics.

Clock Buffers, Drivers Part Context

This part belongs to the Si5330x family of ultra-low additive jitter fanout buffers. Unlike variants such as the SI53304 which include a 2:1 input mux, the SI53308 provides two distinct input channels without internal switching logic between them. It is designed to complement Skyworks oscillators and jitter attenuators for complete clock tree solutions.

Clock Buffers, Drivers Replacement Considerations

The SI53304-B-GM offers similar 6-output capacity but includes a 2:1 input multiplexer and glitchless switching features not present in the SI53308. Designers requiring input selection should evaluate the SI53304 instead.