SI5338A-B05001-GMR

Overview

The SI5338A-B05001-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 offers glitchless frequency adjustments in 1 ppm steps. Encased in a 4x4 mm QFN-24 package, it functions within an ambient temperature range of -40°C to +85°C.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Supports flexible input references: 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 selectable at 1.5, 1.8, 2.5, or 3.3 V.
• Highly configurable spread spectrum (SSC) on any output with frequencies from 5 to 350 MHz and spreads from 0.5 to 5.0%.

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 MSAN/DSLAM/PON

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout compatibility and factory programming parameters. Ensure the I2C pull-up voltage aligns with the supported range of 1.71 V to 3.63 V. Confirm moisture sensitivity handling requirements prior to assembly.

Selection Notes

Select this component for designs requiring zero-delay mode via external feedback or independent phase adjustment with less than 20 ps accuracy. Validate that the required output signal formats and frequencies fall within the specified limits for each driver. Consider the thermal resistance characteristics when designing the PCB land pattern for adequate heat dissipation.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces multiple discrete crystal oscillators by providing four independent clock outputs from a single reference source. The device integrates a PLL and MultiSynth synthesizers to generate precise frequencies without external components beyond the reference oscillator.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence regarding pinout, supply voltage, and jitter specifications before considering alternative sources.

FAQ

What is the maximum input frequency supported by the Si5338?

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

Can the Si5338 perform glitchless frequency adjustments?

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 Si5338?

The Si5338 supports LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL output formats. Each output driver can be independently configured for different formats and supply voltages.