SI53323-B-GM

Clock Buffers, Drivers Overview

The Skyworks SI53323-B-GM is a low-jitter LVPECL fanout clock buffer featuring a 2:1 selectable input multiplexer and four LVPECL outputs. 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 rejection ratio (PSRR) performance. Key electrical specifications include a typical additive jitter of 50 fs rms, a core supply current of 210 mA at 3.3 V, and propagation delay of 800 ps. It operates within an ambient temperature range of –40 °C to +85 °C and is housed in a 16-QFN package.

Clock Buffers, Drivers Feature Summary

• 2:1 Input Mux with Any-Format Input Support
• Four LVPECL Outputs with Independent Enable
• Built-in LDOs for High PSRR Performance
• Ultra-low Additive Jitter (Typical 50 fs rms)

Clock Buffers, Drivers Applications

• Clock distribution in noisy environments
• Redundant clocking systems
• High-speed data acquisition

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel configuration. Confirm RoHS compliance status directly from the datasheet before procurement. Ensure the selected variant matches the required input/output configuration for the target application.

Clock Buffers, Drivers Selection Notes

Select this component when a 2:1 input mux and four LVPECL outputs are required. Verify that the input signal format (LVPECL, LVDS, CML, HCSL, or LVCMOS) is compatible with the universal input stage. Ensure the operating frequency does not exceed 1250 MHz and that the PCB layout accommodates the 16-QFN package dimensions.

Clock Buffers, Drivers Part Context

This part belongs to the Si53320–28 family of low-jitter LVPECL fanout buffers. The family offers various configurations ranging from two to ten outputs, with options for single or dual banks. The SI53323 specifically provides a compact solution with a 2:1 mux and four outputs in a small form factor.

Clock Buffers, Drivers Replacement Considerations

SI53322-B-GM provides similar functionality but with only two LVPECL outputs instead of four. Both devices share the same 16-QFN package and support any-format inputs up to 1250 MHz.