SI5338A-B01086-GMR

Overview

The SI5338A-B01086-GMR is a programmable quad 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 achieves low phase jitter of 0.7 ps RMS and zero ppm frequency accuracy. Input references range from external crystals (8–30 MHz) to differential clocks up to 710 MHz. Configuration is managed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Supports flexible input references: external crystal (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential (5-710 MHz).
• Configurable output drivers support LVPECL/LVDS/CML (up to 710 MHz), HCSL (up to 250 MHz), and CMOS (up to 200 MHz).
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps resolution.

Applications

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

Procurement Notes

Verify the specific ordering suffix B01086 against the manufacturer's official documentation to confirm factory-programmed frequency and pinout configurations. Ensure compatibility with the required I2C pull-up voltage levels, as register adjustments may be necessary for bus voltages below 2.5 V. Confirm moisture sensitivity handling procedures prior to assembly.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single package. Verify that the target output format (LVPECL, LVDS, etc.) matches the load requirements and supply voltage capabilities of the destination device. Ensure the input reference source falls within the supported frequency ranges for optimal jitter performance.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and buffers, consolidating up to four clock sources into a single 4x4 mm QFN package. The device integrates PLL synthesis stages and configurable output drivers to provide precise timing solutions for high-speed digital interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing existing components, verify pin-to-pin compatibility and ensure the replacement supports the required output frequencies and signal formats.

FAQ

What is the maximum input frequency supported by the SI5338A?

The device supports a maximum differential input frequency of 710 MHz. Single-ended CMOS inputs support up to 200 MHz, while SSTL/HSTL inputs support up to 350 MHz.

Can the SI5338A perform glitchless frequency changes?

Yes, the device features an independent frequency increment/decrement capability that allows glitchless frequency adjustments in 1 ppm steps.

What output formats are supported by the four drivers?

Each output driver is independently configurable to support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats, allowing for mixed differential and single-ended outputs.