SI5338A-B05398-GM

Overview

The SI5338A-B05398-GM is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes four independent clocks with zero ppm precision via an I2C interface. The device supports input frequencies up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz depending on the format (LVPECL, LVDS, HCSL, CMOS). It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V with typical current consumption of 45 mA. Key electrical parameters include a typical phase jitter of 0.7 ps RMS and a maximum duty cycle of 60%. The component is housed in a 4 x 4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent any-frequency synthesis on four output drivers with true zero ppm accuracy.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz).
• Features highly configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Includes independent frequency increment/decrement for glitchless adjustments and spread spectrum capabilities.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory-programmed configuration associated with the B05398 suffix against the system requirements. Confirm that the required output frequencies and signal formats match the programmed settings, as this variant is pre-configured at the factory. Ensure the I2C address and control logic are compatible with the host controller.

Selection Notes

Select this part when multiple independent clock frequencies are required from a single source. Ensure the target output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V) are supported by the individual driver supplies. Verify that the input reference source matches the supported frequency ranges for crystal, single-ended, or differential inputs.

Part Context

This component belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and buffers. The 'B' revision indicates specific manufacturing updates. The 'GM' suffix denotes the 24-lead QFN package. Programming is typically performed using ClockBuilder Pro software.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants with different factory programming suffixes. For pin-compatible alternatives with different performance characteristics, consider the Si5335 or Si5334 series, ensuring output count and jitter specifications meet the design needs.