SI5335B-B05740-GMR

Overview

The SI5335B-B05740-GMR is a web-customizable, any-frequency, any-output quad clock generator and buffer manufactured by Skyworks Solutions. It synthesizes four non-integer-related frequencies up to 350 MHz using MultiSynth fractional divider technology, ensuring 0 ppm frequency synthesis error. The device features four output banks supporting differential pairs or single-ended outputs, with configurable formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V and supports three independent pin-selectable configurations. Key electrical parameters include a maximum output frequency of 350 MHz, a typical phase jitter of 0.7 ps RMS, and an operating temperature range of –40 to +85 °C.

Feature Summary

• MultiSynth Technology: Synthesizes four completely non-integer-related frequencies up to 350 MHz with 0 ppm frequency synthesis error.
• Flexible Output Drivers: Supports up to four differential outputs, eight single-ended outputs, or combinations, with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Pin-Selectable Configurations: Allows one device to replace three separate clock generators via three independent, user-assignable configuration states.
• Low Phase Jitter: Achieves 0.7 ps RMS typical phase jitter in clock generator mode with selectable PLL loop bandwidths (1.6 MHz or 475 kHz).

Applications

• PCI Express Gen 1/2/3/4 common clock and jitter attenuation
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking
• DSL jitter attenuation
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration encoded in the B05740 suffix against system requirements, as this part is a custom-programmed device. Confirm that the required input reference source (crystal, CMOS, or differential) matches the programmed input configuration. Ensure the target output voltage levels and formats are supported by the specific output bank assignments defined in the datasheet for this variant.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single package with zero ppm synthesis error. Choose between the 1.6 MHz and 475 kHz loop bandwidth settings based on whether jitter attenuation or faster lock time is prioritized. Verify that the input signal type (XTAL, CMOS, SSTL/HSTL, or Differential) aligns with the available input pins and the programmed configuration. Ensure the PCB land pattern accommodates the 4x4 mm, 24-QFN package.

Part Context

The SI5335B-B05740-GMR belongs to the Si5335 family of highly flexible clock generators. The 'B' indicates it is a member of the standard Si5335 series capable of frequencies up to 350 MHz. The 'GMR' suffix denotes a tape-and-reel packaging format suitable for automated surface-mount assembly. This specific model is a factory-customized variant generated through the ClockBuilder Pro utility, distinguishing it from generic off-the-shelf clock buffers.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Due to the web-customized nature of the Si5335 series, direct pin-to-pin replacements with different manufacturers are unlikely without reconfiguration. If replacing, verify that the new device supports the same four output frequencies, formats, and jitter specifications.