SI53325-B-GMR

Clock Buffers, Drivers Overview

The Skyworks SI53325-B-GMR is a low-jitter LVPECL fanout clock buffer featuring two banks with five LVPECL outputs each. It accepts any-format inputs, including LVPECL, LVDS, CML, HCSL, and LVCMOS, across a frequency range from DC to 1250 MHz. The device integrates built-in LDOs for high power supply noise rejection (PSRR) and supports independent output enables. It operates on a single supply voltage of 2.5 V or 3.3 V within the -40°C to +85°C temperature range.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter of 50 fs rms
• Two banks providing up to 10 LVPECL outputs
• Universal input supporting LVPECL, LVDS, CML, HCSL, and LVCMOS
• Built-in LDOs for enhanced PSRR performance

Clock Buffers, Drivers Applications

• Clock and data distribution systems
• Redundant clocking architectures
• High-speed digital interfaces requiring low-skew buffering

Clock Buffers, Drivers Procurement Notes

Verify the specific package variant during procurement, as the Si53325 family is available in both 32-QFN and 32-eLQFP packages. Confirm that the selected part number corresponds to the required pinout and thermal characteristics for the target application environment.

Clock Buffers, Drivers Selection Notes

Select this component when dual-bank redundancy or separate clock domain buffering is required. Ensure the input signal slew rate meets the minimum specifications (0.75 V/ns for differential, 1.0 V/ns for single-ended) to maintain optimal jitter performance. Verify compatibility with the downstream LVPECL receiver termination requirements.

Clock Buffers, Drivers Part Context

The SI53325-B-GMR belongs to the Si5332x family of fixed-format LVPECL buffers. This family includes variants with different output counts and input configurations, such as the Si53320 with selectable mux inputs and the Si53326 limited to LVCMOS inputs. The Si53325 specifically provides a dual-bank architecture for flexible clock routing.

Clock Buffers, Drivers Replacement Considerations

Si53325-B-GM is a parameter-equivalent alternative in a different package configuration.