SI5350A-B04458-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5350A-B04458-GM is a factory-programmable CMOS clock generator designed to replace discrete crystals and oscillators. It utilizes a PLL and MultiSynth architecture to generate up to eight non-integer-related frequencies ranging from 2.5 kHz to 200 MHz with 0 ppm error. The device operates on a fixed-frequency crystal reference of 25 or 27 MHz. It supports configurable spread spectrum, glitchless frequency changes, and static phase offsets. Power supply requirements include VDD and VDDO options of 1.8 V, 2.5 V, or 3.3 V. The component is housed in a 20-QFN (4x4 mm) package providing eight LVCMOS outputs.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple independent output frequencies without integer relationship constraints
• Supports pin-controlled glitchless frequency transitions for dynamic system reconfiguration
• Integrates selectable spread spectrum modulation to reduce electromagnetic interference
• Provides separate voltage domains for core logic and output buffers to facilitate level translation

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-definition television and set-top boxes
• Audio/video equipment and gaming consoles
• Printers, scanners, and projectors
• Residential gateways and networking communication devices
• Servers and storage systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and factory programming details. Ensure the required crystal load capacitance matches the internal settings configured during manufacturing. Confirm that the target application voltage levels align with the specified VDD and VDDO ranges to guarantee proper operation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a custom frequency plan requires multiple independent clocks derived from a single reference. The 20-QFN package provides eight outputs suitable for complex system timing. Verify that the maximum output frequency does not exceed 200 MHz and that the number of simultaneous frequencies above 112.5 MHz adheres to the two-frequency limit constraint defined in the electrical specifications.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5350 family of clock generators manufactured by Skyworks Solutions. The 'A' variant specifically denotes support for crystal references only, distinguishing it from variants supporting voltage-controlled inputs or external clock inputs. The 'B' indicates factory pre-programming, differentiating it from blank I2C-programmable versions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the same family include other Si5350A variants with different output counts or packages, such as the 10-MSOP or 16-QFN versions. Cross-family substitution with Si5351 models requires verification of control interface differences, as Si5351 variants typically utilize I2C programming rather than pin-based configuration.