SI5338A-B07958-GMR

Overview

The SI5338A-B07958-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports a core supply of 1.8, 2.5, or 3.3 V and operates within a temperature range of –40 to +85 °C. Key electrical parameters include a maximum input frequency of 710 MHz, typical phase jitter of 0.7 ps RMS, and a typical core supply current of 45 mA. It is housed in a 4 x 4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical, supporting PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliance.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) with support for LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL, and CML formats.

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix B07958 against the manufacturer's official documentation to confirm factory programming details. Confirm that the GMR suffix corresponds to the required tape-and-reel packaging format for automated assembly processes.

Selection Notes

Select this component when designing systems requiring four independent clock outputs with varying frequencies and signal formats. Ensure the application supports the required I2C interface for configuration and verify that the input reference source matches the supported frequency ranges for optimal jitter performance.

Part Context

This part belongs to the Si5338 family of high-performance clock generators. The 'A' designation typically indicates the primary variant within this series, while the alphanumeric code 'B07958' represents a specific factory-programmed configuration for frequency and output settings.

Replacement Considerations

Direct replacements must be sought from the Si5338 family. Verify pin compatibility and electrical specifications, particularly output drive strength and jitter performance, before substituting other programmable clock generators.

FAQ

What is the maximum input frequency supported by the SI5338A?

The device supports a maximum differential input frequency of 710 MHz.

Can the output drivers operate at different supply voltages?

Yes, each output driver can be independently configured to operate at 1.5, 1.8, 2.5, or 3.3 V.

Is the device compliant with PCIe standards?

Yes, it is compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 Separate Reference No Spread (SRNS) standards.