SI5346B-B-GM

SI5346B-B-GM is Silicon Labs’ high-performance clock generator / jitter cleaner. It takes a reference clock (or two) and uses an integrated PLL-based synthesizer to produce multiple, phase-aligned output clocks. Key points:
- Multi-output clock generator with programmable frequencies from a single reference
- Jitter attenuation / clean clock outputs suitable for high-speed SERDES, FPGA, and memory interfaces
- Fractional- or integer-N synthesis options, plus spread-spectrum for EMI control
- I2C control interface for configuring outputs, drive strength, enable/disable, and other options
- Flexible output standards and voltage levels (programmable per-output)
- Useful for clocking SoCs/FPGA systems, networking PHYs, and other multi-domain clocking needs
- Package suffix -GM indicates the specific RoHS-compliant package variant
Design flow (high level): select reference, determine required output frequencies, use ClockBuilder Pro to generate register settings, program via I2C, then route multiple clean clocks to the system.

SI5346B-B-GM is in an 8-pin MSOP package (MSOP-8), RoHS-compliant. Package code: GM.

- Pin count: 28-pin QFN (Si5346B-B-GM variant)
- Function: Any-Output, Zero-Delay Clock Multiplier/Buffer. It takes a reference clock and generates up to multiple programmable output clocks with low jitter (I2C-controlled).

- Manufacturer: Silicon Labs (Silicon Laboratories, Inc.)
- What kind of company: A US-based semiconductor company that designs and manufactures integrated circuits, including timing/clock ICs, wireless MCUs, sensors, and other IoT-related IC solutions.

Applications of SI5346B-B-GM include:
- High-performance clock generation and distribution for FPGA/SoC/DSP systems
- SerDes timing for PCIe, SATA, USB, Ethernet
- ADC/DAC sampling clocks and timing alignment
- Telecom/datacom clock networks and backplane timing
- Test & measurement gear needing low-jitter, multi-output clocks from a single reference with I2C control