SI53344-B-GMR

Clock Buffers, Drivers Overview

The SI53344-B-GMR is a low-jitter LVDS fanout buffer from the Si5334x family, manufactured by Skyworks Solutions. It provides ten LVDS outputs from any-format inputs (LVPECL, LVDS, CML, HCSL, LVCMOS) with a frequency range of dc to 1250 MHz. The device features an internal 2:1 input mux for clock selection and built-in LDOs for high power supply noise rejection. Typical additive jitter is 50 fs rms. It operates on a single VDD supply ranging from 1.71 V to 3.63 V and is housed in a 32-QFN package.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter of 50 fs rms
• Ten LVDS outputs with any-format input support
• Built-in LDOs for high PSRR performance
• 2:1 Input Mux for redundant clocking

Clock Buffers, Drivers Applications

• Clock distribution networks
• Redundant clocking applications
• Low jitter clock buffering in noisy environments

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required packaging or environmental standards. Confirm availability through authorized distributors as stock levels fluctuate. Cross-reference the datasheet revision date to ensure all electrical specifications match the design requirements.

Clock Buffers, Drivers Selection Notes

Select this component when ten differential LVDS outputs are required from diverse input formats. Ensure the input signal slew rate meets the minimum specification (0.75 V/ns for differential) to maintain jitter performance. Verify that the PCB layout accommodates the 32-QFN package dimensions and thermal pad requirements for proper heat dissipation.

Clock Buffers, Drivers Part Context

This part belongs to the Si53340-45 family of fixed-format LVDS buffers. Unlike other members of the series such as the SI53341 or SI53343 which accept only LVCMOS inputs, the SI53344 supports universal any-format inputs. It shares the same core architecture and low-jitter characteristics as its siblings but offers a higher output count in a larger package.

Clock Buffers, Drivers Replacement Considerations

SI53340-B-GM provides four outputs in a smaller package. SI53342-B-GM offers three outputs per bank in a 24-QFN package. Direct pin-to-pin replacement is not possible due to differing output counts and package sizes; redesign may be required.