SI5338A-B-GM

Overview

The SI5338A-B-GM is a high-performance, low-jitter clock generator featuring four independent output drivers. It utilizes patented MultiSynth technology to synthesize any frequency with 0 ppm precision on each driver. The device supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz). Outputs support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats with independent supply voltages of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a maximum output frequency of 710 MHz, typical phase jitter of 0.7 ps RMS, core supply current of 45 mA, and operation from a single 1.8, 2.5, or 3.3 V core supply.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis with true zero ppm accuracy on four outputs.
• Low phase jitter of 0.7 ps RMS typ, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible input options: external crystal (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), or differential (5-710 MHz).
• Independent output voltage configuration per driver (1.5, 1.8, 2.5, or 3.3 V) with glitchless frequency adjustment in 1 ppm steps.

Applications

• Ethernet switch/router
• PCIe Gen1/2/3/4
• Broadcast video/audio timing
• Processor and FPGA clocking
• MSAN/DSLAM/PON

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure compatibility with I2C/SMBus interface requirements for system integration. Confirm that the selected variant meets the required operating temperature range of -40 to +85 °C for the intended application environment.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies with low jitter from a single IC. It serves as a replacement for up to four discrete crystal oscillators. Ensure the design accommodates the 4x4 mm QFN-24 package dimensions and provides appropriate decoupling for the 1.8, 2.5, or 3.3 V core supply. Use ClockBuilder Pro software for configuration.

Part Context

The SI5338A-B-GM belongs to the Si5338 family of I2C-programmable quad clock generators. This series is designed to replace multiple fixed-frequency oscillators in complex digital systems. The 'A' designation typically indicates the specific frequency performance grade within the family, while 'GM' denotes the 24-QFN package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.