402F270XXCDR

Crystals Overview

The 402F270XXCDR is a fundamental mode crystal resonator manufactured by CTS-Frequency Controls. It operates at a nominal frequency of 27 MHz with a standard frequency tolerance of ±15ppm. The component features a load capacitance of 18pF and an equivalent series resistance (ESR) of 100 Ohms. It utilizes a hermetically sealed ceramic surface-mount package, specifically the 4-SMD, No Lead configuration with dimensions of 2.00mm x 1.60mm x 0.55mm maximum height. The device supports operation within a temperature range of -20°C to +70°C and complies with RoHS3 standards.

Crystals Feature Summary

• Hermetically sealed ceramic SMD package for environmental protection
• Fundamental mode crystal design ensuring stable oscillation
• Compact 4-SMD no-lead footprint suitable for automated assembly

Crystals Applications

• Clock generation in microcontroller circuits
• Frequency reference for communication modules
• Timing sources in consumer electronic devices

Crystals Procurement Notes

Verify the specific suffix code against the official CTS datasheet to confirm exact electrical parameters, as generic model numbers may represent multiple variants. Ensure the selected variant matches the required load capacitance and tolerance for the target circuit design. Confirm availability status directly with authorized distributors, as stock levels fluctuate. Cross-reference the manufacturer part number with internal bill-of-materials to prevent substitution errors during procurement.

Crystals Selection Notes

Select this component when a 27 MHz fundamental mode crystal with ±15ppm stability is required for space-constrained designs. The 18pF load capacitance must align with the oscillator circuit's capacitive requirements. Consider the 100 Ohm ESR value for drive level sensitivity analysis. The hermetic seal offers advantages over non-sealed alternatives in harsh environments, though the operating temperature range is limited to commercial grades.

Crystals Part Context

This component belongs to the CTS 402 Series, which encompasses a wide range of fundamental mode crystals designed for surface-mount applications. The series provides various frequency codes and package options to support diverse timing needs. The 402F270XXCDR specifically addresses the common 27 MHz requirement using the standardized 2.00mm x 1.60mm ceramic package format prevalent in modern electronics manufacturing.

Crystals Replacement Considerations

Direct substitutes include other 27 MHz crystals from the same series with identical package dimensions and electrical characteristics. Verify that any replacement maintains the 18pF load capacitance and ±15ppm tolerance. Equivalent parts from other manufacturers must match the 4-SMD no-lead form factor and hermetic sealing properties to ensure mechanical and electrical compatibility.