ECS-270-20-4VX

Crystals Overview

The ECS-270-20-4VX is a 27 MHz fundamental mode crystal oscillator manufactured by ECS Inc. Designed for through-hole mounting in HC49/US packages, this component features a load capacitance of 20pF and a frequency tolerance of ±30ppm. It offers a frequency stability of ±50ppm over temperature ranges and maintains an equivalent series resistance (ESR) of 100 ohms maximum. The device operates in third overtone mode and complies with RoHS standards, ensuring lead-free construction suitable for modern electronic assembly requirements.

Crystals Feature Summary

• Through-hole compatible HC49/US package design
• RoHS compliant lead-free construction
• Third overtone operational mode

Crystals Applications

• Microcontroller clock sources
• Communication transceiver timing
• Industrial control system oscillators

Crystals Procurement Notes

Verify the specific ordering suffix to confirm package type and compliance status. Ensure the required load capacitance matches the circuit design specifications. Confirm that the frequency tolerance meets the system timing accuracy requirements before finalizing procurement orders.

Crystals Selection Notes

Select this component when a 27 MHz reference signal is required for through-hole PCB layouts. Consider the 20pF load capacitance requirement for proper oscillator circuit tuning. Evaluate the ±30ppm tolerance against the application's frequency drift constraints.

Crystals Part Context

This part belongs to the ECS Inc. standard crystal lineup, specifically utilizing the HC49/US form factor. It serves as a passive frequency-determining element within resonant circuits, providing stable oscillation frequencies for digital logic and analog signal processing applications.

Crystals Replacement Considerations

Direct substitutes must match the 27 MHz frequency, 20pF load capacitance, and HC49/US package dimensions. Verify equivalent ESR and stability ratings to ensure circuit compatibility without redesign.