SI53343-B-GM

Clock Buffers, Drivers Overview

The SI53343-B-GM is a low-jitter LVDS fanout clock buffer from the Si5334x family, manufactured by Skyworks Solutions. It features a 2:1 selectable input multiplexer and provides three LVDS outputs organized into two independent banks (Q0-Q2 and Q3-Q5). The device accepts single-ended LVCMOS inputs only and operates within a frequency range of DC to 200 MHz. It supports supply voltages of 1.8 V, 2.5 V, or 3.3 V and includes built-in LDOs for high power supply noise rejection. Packaged in a 24-QFN (4x4 mm) format, it is designed for redundant clocking and distribution applications.

Clock Buffers, Drivers Feature Summary

• Three LVDS outputs with independent bank control via OEAb and OEBb pins
• 2:1 Input MUX for selecting between CLK0 and CLK1 sources
• LVCMOS-only input compatibility with AC/DC coupling options
• Built-in LDOs providing high PSRR performance

Clock Buffers, Drivers Applications

• Redundant clocking systems requiring source selection
• Clock distribution networks for FPGAs and ASICs
• Low-jitter signal buffering in noisy environments

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 that the design environment supports LVCMOS input signals, as this variant does not accept differential formats. Check for RoHS compliance status in the latest datasheet revision.

Clock Buffers, Drivers Selection Notes

Select the SI53343-B-GM when LVCMOS input signals are available and LVDS output distribution is required. Ensure the application frequency remains below 200 MHz. Consider the SI53342-B-GM if any-format (differential) inputs are needed instead of LVCMOS. Verify that the 24-QFN footprint matches the PCB layout constraints.

Clock Buffers, Drivers Part Context

This component belongs to the Si53340-45 family of low-jitter LVDS fanout buffers. Unlike the universal input variants (Si53340/42/44), the Si53343 is restricted to LVCMOS inputs. It shares the same 24-QFN package and dual-bank output architecture as the Si53342 but differs in input interface requirements.

Clock Buffers, Drivers Replacement Considerations

SI53342-B-GM offers identical output configuration but supports any-format inputs including LVDS and CML.