3.579545M20PI/49US

Crystals Overview

The YIC 3.579545M20PI/49US is a through-hole quartz crystal resonator operating at a nominal frequency of 3.579545 MHz. It features a load capacitance of 20 pF and a frequency tolerance of ±30 ppm. The unit utilizes an HC-49/US package with a terminal pitch of 4.88 mm. Key electrical specifications include a motional resistance of 180 Ohms, a maximum drive power of 1 mW, and a long-term time stability of ±5 ppm per year.

Crystals Feature Summary

• Provides stable oscillation at the standard NTSC color burst frequency
• Utilizes a robust HC-49/US through-hole package for reliable mounting
• Maintains frequency stability over time with specified aging rates

Crystals Applications

• NTSC video signal processing circuits
• Color subcarrier generation in television systems
• General-purpose clock reference for microcontrollers requiring 3.58 MHz

Crystals Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to ensure exact electrical characteristics match the design requirements. Confirm that the HC-49/US package dimensions align with the PCB footprint constraints. Check for any recent updates to the component's RoHS compliance status or lead time estimates directly from authorized distributors before finalizing procurement orders.

Crystals Selection Notes

Select this component when a precise 3.579545 MHz reference is required for analog video applications. Ensure the circuit design supports the 1 mW maximum drive level to prevent frequency pulling or crystal damage. Verify that the ±30 ppm tolerance meets the system's phase noise and jitter requirements. Consider the 20 pF load capacitance compatibility with the oscillator circuit's internal capacitors.

Crystals Part Context

This part belongs to YIC's line of general-purpose AT-cut quartz crystals designed for through-hole assembly. The HC-49/US form factor is widely adopted in consumer electronics and industrial equipment due to its mechanical durability and standardized pin spacing. It serves as a fundamental timing element for generating precise clock signals in legacy and specialized video hardware.

Crystals Replacement Considerations

Direct substitutes must match the 3.579545 MHz frequency, 20 pF load capacitance, and HC-49/US package. Verify equivalent motional resistance and drive level specifications. Cross-reference with other manufacturers offering NTSC-compatible crystals to ensure pinout and dimensional compatibility.