SI5338A-B02498-GMR

Overview

The SI5338A-B02498-GMR is an I2C-programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency on four independent outputs with zero ppm precision and a typical RMS jitter of 0.7 ps. The device supports differential (LVPECL, LVDS, CML) and single-ended (CMOS, HCSL, SSTL, HSTL) formats across frequencies up to 710 MHz. It operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V within a 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth architecture enables independent, glitchless frequency synthesis on four outputs with 0 ppm accuracy.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Configurable output drivers support multiple voltage levels (1.5, 1.8, 2.5, 3.3 V) and signal formats.
• Includes spread spectrum generation, phase adjustment (<20 ps steps), and loss-of-lock/signal alarms.

Applications

• PCIe Gen 1/2/3/4 Common Clock and SRNS compliant systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the exact factory configuration, as part numbers in this series are defined by unique frequency and format settings. Confirm RoHS compliance status through official datasheets prior to integration.

Selection Notes

Select based on required output frequencies and signal formats. Ensure the input reference matches available sources (crystal vs. differential). Verify that the target application fits within the 710 MHz maximum output limit and that the power supply constraints align with the 1.8 V to 3.3 V operating range.

Part Context

This component belongs to the Si5338 family of low-jitter clock generators. It replaces discrete crystal oscillators and buffers, consolidating up to four clock sources into a single programmable IC. The device is designed for high-performance digital systems requiring precise timing synchronization.

Replacement Considerations

Direct replacements require matching the pinout and electrical characteristics. Verify that alternative devices support the same MultiSynth-like any-frequency synthesis capabilities and compatible output drive strengths for the specific application requirements.

FAQ

What is the maximum input frequency supported?

The device supports differential inputs up to 710 MHz, while single-ended CMOS inputs are limited to 200 MHz.

Can the device operate without an external crystal?

Yes, it can accept external clock signals via differential pins (IN1/2, IN5/6) or single-ended pins (IN3/4).

Is frequency adjustment glitchless?

Yes, the independent frequency increment/decrement feature allows glitchless adjustments in 1 ppm steps.