SI5338M-B05142-GMR

Overview

The SI5338M-B05142-GMR is a 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 (up to 200 MHz), SSTL/HSTL (up to 350 MHz), and differential inputs (up to 710 MHz). Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, supporting frequencies up to 710 MHz. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, features low phase jitter (0.7 ps RMS typ), and is housed in a 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth™ Technology: Enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Flexible Input Support: Accepts external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Configurable Outputs: Supports LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz) with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Low Jitter & Precision: Typical phase jitter of 0.7 ps RMS; glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps accuracy.

Applications

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

Procurement Notes

Verify the specific ordering suffix B05142 against the manufacturer's official documentation to confirm the exact pre-programmed frequency configuration and pinout assignment. Ensure I2C pull-up voltages are compatible with the selected core supply voltage, noting that register 27 must be written if the I2C bus voltage is below 2.5 V.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single IC. It replaces discrete oscillators and frequency translators. Ensure the required output format (LVPECL, LVDS, etc.) and frequency range fall within the specified limits for each driver. Consider the 4x4 mm QFN-24 package size for space-constrained designs.

Part Context

The SI5338M-B05142-GMR belongs to the Si5338 family of I2C-programmable clock generators. This series is designed to replace multiple crystal oscillators by providing synthesizable clocks with low jitter. The 'GMR' suffix indicates it is supplied in a tape and reel packaging format suitable for automated surface-mount assembly.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. When replacing existing oscillators, verify that the new device's input reference requirements and output drive capabilities match the target system specifications.