SI5338C-B12236-GM

Overview

The SI5338C-B12236-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The device operates with a core supply of 1.8 V, 2.5 V, or 3.3 V and accepts inputs up to 710 MHz. Key electrical parameters include a typical RMS jitter of 0.7 ps, a maximum input frequency of 710 MHz, and a maximum output frequency of 710 MHz for differential outputs. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis with zero ppm precision on four output drivers.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Features low phase jitter of 0.7 ps RMS typ and glitchless frequency adjustments via independent increment/decrement features.
• Programmable via I²C/SMBus interface with support for spread spectrum modulation and independent output voltage levels.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router and 1 GbE/10 GbE networking equipment.
• Processor and FPGA clocking solutions.
• Broadcast video/audio timing infrastructure.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm pinout configuration and factory programming. Ensure compatibility with I2C bus voltages if operating below 2.5 V by checking register settings. Confirm thermal management requirements for the 24-QFN package under maximum load conditions.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single source. Ensure the target output format (LVDS, LVPECL, etc.) matches the receiver specifications. Verify that the input reference frequency falls within the supported ranges for the desired output synthesis mode.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' in the model number typically denotes a specific pinout or feature set variant within the series, while 'B12236' represents the factory-programmed configuration file. The '-GM' suffix indicates tape and reel packaging.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants such as SI5338Q-B-GMR or SI5338F-B-GMR, provided the specific factory configuration matches the application requirements. Cross-model substitution requires verification of pin compatibility and output driver capabilities.