SI5338G-B04256-GM

Overview

The Skyworks SI5338G-B04256-GM is a programmable clock generator utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. The device operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. It features low phase jitter of 0.7 ps RMS typ, 0 ppm frequency accuracy, and flexible input references up to 710 MHz. Packaged in a 4x4 mm QFN-24, it allows independent voltage selection per driver.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Low phase jitter of 0.7 ps RMS typical across LVPECL, LVDS, CML, and HCSL outputs.
• I2C/SMBus compatible programming via ClockBuilder Pro software for easy configuration.
• Flexible input support: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential (5–710 MHz).

Applications

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

Procurement Notes

Verify the specific ordering suffix G-M against the manufacturer's latest documentation to confirm package type and tape/reel specifications. Confirm availability through authorized distributors as stock levels fluctuate. Ensure I2C pull-up voltages match the system design, noting register adjustments may be required for bus voltages below 2.5 V.

Selection Notes

Select this component when zero ppm frequency accuracy and low jitter are critical for high-speed serial interfaces like PCIe or Ethernet. Choose based on required output formats (LVDS vs CMOS) and supply voltages (1.8V, 2.5V, 3.3V). Verify input reference compatibility, ensuring the source signal falls within the supported frequency ranges for the chosen input pin configuration.

Part Context

The SI5338G-B04256-GM belongs to the Si5338 family of quad clock generators. This series replaces multiple discrete oscillators with a single programmable IC. The 'B' indicates a specific factory configuration, while 'GM' denotes the QFN-24 package. It is designed for space-constrained designs requiring high-performance clock distribution.

Replacement Considerations

Direct replacements within the Si5338 family include SI5338A, SI5338B, SI5338F, and SI5338Q variants, depending on the required maximum output frequency (200 MHz, 350 MHz, or 710 MHz). Ensure the substitute part number matches the specific frequency plan and output format requirements of the original design.