SI5338A-B05991-GM

Overview

The SI5338A-B05991-GM is an I2C-programmable quad clock generator from Skyworks Solutions. It synthesizes any frequency on four output drivers using MultiSynth technology, achieving zero ppm precision. The device supports a core supply of 1.8 V, 2.5 V, or 3.3 V and operates within a temperature range of –40 to +85 °C. Key electrical parameters include a maximum input frequency of 710 MHz and a typical phase jitter of 0.7 ps RMS. It features independently configurable outputs supporting formats such as LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis with 0 ppm accuracy on four differential output drivers
• Low phase jitter of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz)
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) with glitchless frequency adjustments in 1 ppm steps

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON equipment

Procurement Notes

Verify the specific ordering suffix B05991 against the manufacturer's current documentation to confirm factory pre-programming details. Ensure compatibility with I2C/SMBus interfaces for configuration via ClockBuilder Pro software. Confirm package integrity for the 24-lead QFN form factor during handling.

Selection Notes

Select this component when low jitter (< 1 ps RMS) and high precision (0 ppm) are required for multiple asynchronous clocks. Verify that the required output frequencies fall within the supported ranges for the chosen signal format (e.g., up to 710 MHz for LVDS/LVPECL). Ensure the design accommodates the 4x4 mm QFN-24 package thermal requirements.

Part Context

This part belongs to the Si5338 family of programmable clock generators. It replaces discrete crystal oscillators by providing flexible frequency synthesis. The device integrates a PLL and MultiSynth dividers to generate precise clock signals from various input references, offering a compact solution for complex timing architectures.

Replacement Considerations

Direct substitutes within the same family include SI5338A-B-GM or SI5338A-B11958-GMR, provided the pre-programmed frequency settings match the application requirements. Cross-model replacements require verification of pinout compatibility and electrical parameter alignment.