SI5338A-B05246-GM

Overview

The SI5338A-B05246-GM is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes four independent clocks with zero ppm precision via an I2C interface. The device supports input frequencies up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz depending on the format (LVPECL, LVDS, HCSL, CMOS, SSTL/HSTL). Key electrical parameters include a core supply voltage of 1.8 V, 2.5 V, or 3.3 V, typical operating current of 45 mA, and RMS jitter as low as 0.7 ps. It operates within a temperature range of -40 °C to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables any-frequency synthesis with 0 ppm accuracy on four independent outputs.
• Low phase jitter performance of 0.7 ps RMS typical.
• Flexible input support including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz.
• Independent output voltage configuration per driver (1.5, 1.8, 2.5, or 3.3 V) and glitchless frequency/phase adjustments.

Applications

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

Procurement Notes

Verify the specific factory programming code associated with the B05246 suffix against the manufacturer's ordering guide to confirm the exact synthesized frequencies and output formats. Confirm that the required I2C pull-up voltages align with the supported 1.71 V to 3.63 V range and check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies derived from a single reference source. Ensure the target output formats (LVPECL, LVDS, HCSL, etc.) match the load requirements of the destination devices. Verify that the input reference signal meets the specified slew rate and amplitude constraints to maintain optimal jitter performance.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' designation typically indicates a specific factory-programmed configuration variant within the series. The 'GM' suffix denotes the 24-lead QFN package type. This model serves as a replacement for multiple discrete crystal oscillators in complex digital systems.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants such as SI5338A-B-GM or SI5338Q-B-GMR, provided their pre-programmed frequencies match the design requirements. Generic clock generators may not offer the same jitter performance or flexible output voltage configurations without additional circuitry.