SI5338A-B01449-GMR

Overview

The SI5338A-B01449-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes four independent outputs with zero ppm accuracy via an I2C interface. The device supports differential and single-ended formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. Maximum output frequencies reach 710 MHz for differential signals and 200 MHz for CMOS. It operates on a 1.8 V, 2.5 V, or 3.3 V core supply with typical current consumption of 45 mA. Jitter performance is specified at 0.7 ps RMS typ.

Feature Summary

• MultiSynth technology enables independent frequency synthesis on four drivers with true zero ppm accuracy.
• Supports flexible input references: external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential inputs (5-710 MHz).
• Configurable spread spectrum generation with adjustable frequency deviation (0.5% to 5.0%) and modulation rates (33 to 63 kHz).
• Glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps resolution.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking solutions
• Broadcast video/audio timing applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the pre-programmed configuration values. Ensure the I2C pull-up voltage aligns with register settings if operating below 2.5 V. Confirm package availability and moisture sensitivity levels prior to procurement.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single source. Verify that the target output format (LVPECL, LVDS, etc.) matches the load requirements. Check that the input reference frequency falls within the supported ranges for the chosen mode. Ensure power supply constraints match the 1.8 V, 2.5 V, or 3.3 V options.

Part Context

This part belongs to the Si5338 family of low-jitter clock generators. It replaces discrete crystal oscillators by providing any-frequency synthesis. The device integrates a PLL and output buffers in a compact 4x4 mm QFN-24 package suitable for space-constrained designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate pin-compatible alternatives only after verifying electrical parameter compatibility and software configuration support.