SI5351A-B-GM
Overview
The SI5351A-B-GM is a highly flexible I2C-programmable clock generator capable of synthesizing up to 8 non-integer-related frequencies from 2.5 kHz to 200 MHz. It uses a dual PLL architecture to provide exact frequency synthesis with 0 ppm error, effectively replacing multiple crystals and oscillators in complex digital systems.
Why Choose This Part
This IC offers low period jitter of less than 70 ps peak-to-peak and allows for glitchless frequency changes and configurable spread spectrum to reduce EMI. Its separate voltage supply pins for each output allow for easy level translation across 1.8V, 2.5V, and 3.3V logic without external hardware.
Applications
Key Specifications
Getting Started
Designers can use the Skyworks ClockBuilder Pro software to generate configuration files and then load them into the IC via the I2C interface. For hardware evaluation, the Si5351A-B-EVB provides a convenient platform to test output configurations and frequency accuracy.
SI5351A-B Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Type | Input | Voltage | Number of Circuits | Ratio - Input:Output | Stock |
|---|---|---|---|---|---|---|---|
| SI5351A-B-GM (this part) | VFQFN-20 | Clock Generator | Crystal | 1.71V | 2 | 1:8 | 637 |
| SI5351A-B-GMR | VFQFN-20 | Clock Generator | Crystal | 1.71V | 2 | 1:8 | 8,951 |
| SI5351A-B-GM1 (Skyworks Solutions, Inc.) | VFQFN-16 | Clock Generator, V.. | Clock, Crystal | 2.25V | 1 | 1:4 | 272 |
Also Consider
