SI5338C-B05274-GMR

Overview

The SI5338C-B05274-GMR is an I2C-programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports core supply voltages of 1.8, 2.5, or 3.3 V and operates within a temperature range of –40 to +85 °C. The device features low phase jitter of 0.7 ps RMS typical, flexible input references up to 710 MHz, and configurable output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. Packaged in a 4 x 4 mm 24-QFN, it enables zero ppm precision and glitchless frequency adjustments.

Feature Summary

• MultiSynth technology for independent, any-frequency synthesis on four differential output drivers
• Low phase jitter of 0.7 ps RMS typical with high precision zero ppm frequency accuracy
• Flexible input reference support: external crystal (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential (5-710 MHz)
• Configurable spread spectrum (SSC) on any output with adjustable frequency, spread, and modulation rate

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON applications

Procurement Notes

Verify the specific factory programming configuration associated with the B05274 suffix against the design requirements using ClockBuilder Pro software. Confirm that the 24-QFN package land pattern matches the recommended PCB layout specifications provided in the datasheet. Ensure I2C pull-up voltage compatibility with the system bus voltage.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single IC to replace discrete oscillators. Verify that the required output signal formats (LVPECL, LVDS, etc.) and supply voltages align with the driver capabilities. Check if the 0.7 ps RMS jitter specification meets the system's timing budget for PCIe or Ethernet applications.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' indicates commercial temperature range (-40 to +85 °C), while the 'GMR' suffix denotes tape and reel packaging. The unique identifier B05274 specifies the pre-programmed register settings for frequency and format configuration.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different temperature grades or packaging options, such as SI5338Q-B-GMR for extended industrial temperature ranges. Ensure the replacement part has compatible factory programming or can be reprogrammed via I2C.