SI5338D-B-GMR

Overview

The SI5338D-B-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with 0 ppm precision. The device supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, with individual supply voltages of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, typical operating current of 45 mA, and low phase jitter of 0.7 ps RMS. It operates within a temperature range of –40 to +85 °C in a 24-lead QFN package.

Feature Summary

• I2C/SMBus programmable quad clock generator with MultiSynth technology for zero ppm frequency accuracy
• Flexible input support: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential (5–710 MHz)
• Independent output configuration supporting LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats with adjustable supply voltages
• Low phase jitter of 0.7 ps RMS typical, with glitchless frequency adjustment and spread spectrum capabilities

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch/router and telecom line cards
• Broadcast video/audio timing and processor/FPGA clocking
• MSAN/DSLAM/PON and Fibre Channel/SAN applications

Procurement Notes

Verify the specific ordering suffix 'B' against the manufacturer's latest datasheet revision 1.6 to confirm pinout, packaging, and functional specifications. Ensure compatibility with ClockBuilder Pro software for programming. Check for moisture sensitivity levels and recommended reflow soldering profiles during procurement planning.

Selection Notes

Select this component when designing systems requiring independent clock frequencies with varying signal formats and voltage levels. Ensure the input reference matches the supported ranges (crystal, CMOS, or differential). Verify that the required output frequencies do not exceed the limits for specific formats (e.g., 200 MHz for CMOS, 710 MHz for LVDS/LVPECL). Consider thermal resistance characteristics for PCB layout.

Part Context

The SI5338 series replaces multiple discrete oscillators with a single programmable IC. The 'D' variant typically denotes specific factory programming or pin configurations within the Si5338 family. The '-GMR' suffix indicates a tape-and-reel packaging format suitable for automated surface-mount assembly. This part belongs to the broader Si533x family of low-jitter clock generators.

Replacement Considerations

Direct replacements within the Si5338 family (e.g., SI5338C, SI5338Q) may require verification of the specific ordering suffix to ensure identical pinouts and programmed frequencies. Cross-family replacements should be evaluated based on package size, pin count, and jitter performance requirements.