SI5338A-B04149-GM

Overview

The SI5338A-B04149-GM is an I2C-programmable quad clock generator utilizing MultiSynth technology for independent, any-frequency synthesis on four output drivers. It supports differential and single-ended outputs with frequencies up to 710 MHz. The device features low phase jitter of 0.7 ps RMS typical, true zero ppm frequency accuracy, and configurable spread spectrum. It operates from a single core supply of 1.8, 2.5, or 3.3 V and includes independent output voltage control (1.5, 1.8, 2.5, or 3.3 V). Packaged in a 4x4 mm QFN-24, it supports flexible input references including external crystals (8–30 MHz) and various digital inputs.

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; compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS.
• Highly-configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Independent frequency increment/decrement and phase adjustment capabilities with glitchless adjustments.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm factory programming parameters. The 'GM' suffix indicates a tape-and-reel package configuration. Confirm that the pre-programmed NVM settings match the target application requirements, as these are fixed at the factory.

Selection Notes

Select this component when multiple independent clock frequencies with high precision are required from a single IC. Ensure the input reference source matches the supported ranges (crystal, CMOS, or differential). Verify that the required output signal formats and supply voltages align with the device's configurable driver options.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The 'A' variant typically denotes specific performance or feature sets within the family, while the numeric suffix defines the factory-programmed clock configuration stored in non-volatile memory.

Replacement Considerations

Direct pin-to-pin replacements within the same package require identical factory-programmed configurations or reprogramming via I2C. Other Si5338 variants may serve as functional substitutes if the electrical specifications and output configurations are compatible.