571QFA000420DGR

Oscillators Overview

The Skyworks Solutions Inc. 571QFA000420DGR is a programmable VCXO from the Si571 series, housed in a 7 mm x 5 mm SMD package. It operates at a fixed frequency of 644.53125 MHz with an LVPECL output format. The device requires a supply voltage between 2.97 V and 3.63 V, drawing up to 120 mA. It supports I2C control for reprogrammability and includes enable/disable functionality. Operating temperatures range from -40°C to +85°C.

Oscillators Feature Summary

• I2C programmable variable frequency crystal oscillator
• LVPECL differential output signal format
• Integrated enable/disable control pin
• Reprogrammable frequency configuration via digital interface

Oscillators Applications

• High-speed serial communication interfaces requiring precise clocking
• Data acquisition systems needing stable reference frequencies
• Telecommunications equipment utilizing I2C configurable oscillators

Oscillators Procurement Notes

Verify the specific output format and frequency against system requirements before ordering. Confirm that the 7 mm x 5 mm footprint matches the PCB layout. Ensure the power supply voltage stays within the 2.97 V to 3.63 V range. Check for availability constraints as distribution status may vary by region.

Oscillators Selection Notes

Select this component when a fixed 644.53125 MHz frequency is required with LVPECL outputs. Consider the Si571 series for I2C programmability needs. Evaluate the 120 mA current consumption against power budget constraints. Verify thermal performance within the -40°C to +85°C operating range.

Oscillators Part Context

This part belongs to the Si571 family of programmable oscillators manufactured by Skyworks Solutions. These devices are designed for applications requiring low phase noise and high stability. The 571QFA000420DGR specifically provides a fixed frequency variant with LVPECL outputs, differing from other variants that may offer different frequencies or output formats like LVDS.

Oscillators Replacement Considerations

Direct substitutes include other Skyworks Si571 variants with matching 644.53125 MHz frequency and LVPECL output. Cross-reference part numbers such as 571AMB000420DG or 571AMA000444DG if frequency and output compatibility are confirmed. Verify package dimensions and pinout compatibility before substitution.