SI5351A-B-GT
Overview
The SI5351A-B-GT is a highly flexible I2C programmable clock generator capable of synthesizing up to three unique frequencies from 8 kHz to 160 MHz. It uses a MultiSynth fractional divider architecture to replace multiple crystal oscillators with a single device, significantly reducing PCB footprint and BOM cost. Operating at a maximum VDD of 3.3V, it provides LVCMOS outputs with low jitter and very low power consumption.
Why Choose This Part
The primary advantage is the any-frequency synthesis capability, allowing engineers to generate non-standard frequencies without custom crystals. Its I2C interface enables dynamic frequency reconfiguration in the field, and the MSOP-10 package offers a small footprint for density-constrained applications.
Applications
Getting Started
Evaluation can be performed using Skyworks' ClockBuilder Pro software to generate configuration files and register maps. For prototyping, the Si5351A-B-GT can be interfaced with any standard I2C master like an MCU to write the PLL and divider settings at boot time.
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-GT (this part) | — | — | — | — | — | — | 5,502 |
| SI5351A-B-GMR (Skyworks Solutions Inc.) | VFQFN-20 | Clock Generator | Crystal | 1.71V | 2 | 1:8 | 8,951 |
| SI5351A-B-GM (Skyworks Solutions Inc.) | VFQFN-20 | Clock Generator | Crystal | 1.71V | 2 | 1:8 | 637 |
| SI5351A-B-GM1 | VFQFN-16 | Clock Generator, V.. | Clock, Crystal | 2.25V | 1 | 1:4 | 272 |
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