SI53323-B-GMR

Clock Buffers, Drivers Overview

The Skyworks SI53323-B-GMR is a low-jitter LVPECL fanout clock buffer featuring four outputs and a selectable 2:1 input multiplexer. It supports any-format inputs including LVPECL, LVDS, CML, HCSL, and LVCMOS across a frequency range of DC to 1250 MHz. The device incorporates built-in LDOs for high power supply noise rejection (PSRR) and independent output enables. It operates on a single 2.5 V or 3.3 V supply within the -40 °C to +85 °C temperature range and is housed in a 16-QFN package.

Clock Buffers, Drivers Feature Summary

• Ultra-low additive jitter performance with typical values of 50 fs rms
• Universal input stage supporting differential and single-ended formats
• Built-in LDOs providing high PSRR for noisy environments
• Configurable 2:1 input mux and individual output enable pins

Clock Buffers, Drivers Applications

• Clock distribution networks requiring low skew
• Redundant clocking systems with dual source selection
• High-speed data acquisition and processing boards

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet revision to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors prior to procurement.

Clock Buffers, Drivers Selection Notes

Select this component when an LVPECL output format is required alongside flexible input compatibility. Ensure the design accommodates the 16-QFN footprint and provides adequate thermal dissipation given the junction-to-ambient resistance characteristics.

Clock Buffers, Drivers Part Context

This part belongs to the Si5332x family of fixed-format LVPECL buffers. It shares core architecture with variants offering different output counts and packaging options, such as the Si53322 and Si53325, allowing for scalable clock tree designs.

Clock Buffers, Drivers Replacement Considerations

Direct replacements include other members of the Si5332x family like the Si53322-B-GM or Si53325-B-GM, provided the pin count and output configuration requirements align with the application design.

Clock Buffers, Drivers FAQ

What input formats are supported by the SI53323?

The device accepts any-format inputs, including LVPECL, low-power LVPECL, LVDS, CML, HCSL, and LVCMOS.

How does the device handle unused outputs?

Unused outputs should be left unconnected; they must not be shorted to ground.

What is the maximum operating frequency?

The Si53323 supports frequencies from DC up to 1250 MHz.