SI53328-B-GM

Clock Buffers, Drivers Overview

The Skyworks SI53328-B-GM is a low-jitter LVPECL fanout clock buffer featuring a 2:1 selectable input multiplexer and two independent output banks. It accepts single-ended LVCMOS inputs and provides up to three LVPECL outputs per bank, totaling six outputs. The device operates from DC to 200 MHz with a typical additive jitter of 50 fs rms. Built-in LDOs deliver high power supply noise rejection (PSRR), reducing external filtering requirements. It supports independent output enables for each bank and functions within a supply voltage range of 2.38–2.63 V or 2.97–3.63 V.

Clock Buffers, Drivers Feature Summary

• 2:1 Input Mux with Single-Ended LVCMOS Input Support
• Dual Bank Architecture with Independent Output Enables
• Ultra-Low Additive Jitter: 50 fs rms Typical
• Built-in LDOs for High PSRR Performance

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments
• Redundant clocking systems
• Low-jitter data distribution networks

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature range. Ensure the design accommodates the 24-QFN footprint dimensions of 4 x 4 mm. Confirm that the application requires single-ended LVCMOS inputs, as this variant does not support universal differential inputs.

Clock Buffers, Drivers Selection Notes

Select the SI53328-B-GM when dual-bank redundancy with independent control is required alongside single-ended LVCMOS input compatibility. This part is distinct from the Si53327, which supports universal any-format inputs. Ensure the target frequency remains within the 200 MHz limit specified for this model.

Clock Buffers, Drivers Part Context

This component belongs to the Si53320–28 family of low-jitter LVPECL fanout buffers. While other members like the Si53327 offer universal input formats, the Si53328 is specifically configured for single-ended LVCMOS inputs. It shares the same 24-QFN package and dual-bank architecture as its sibling but differs in input interface capabilities.

Clock Buffers, Drivers Replacement Considerations

The Si53327-B-GM is a functional alternative if universal input support (LVDS, CML, etc.) is needed instead of LVCMOS-only. Both share the 24-QFN package and dual-bank structure. Verify input signal compatibility before substitution.