402F26022IKR

Crystals Overview

The CTS-Frequency Controls 402F26022IKR is a surface-mount MHz crystal designed for fundamental mode operation. It operates at a nominal frequency of 26 MHz with a frequency tolerance and stability of ±20ppm. The component features a load capacitance of 8pF and an equivalent series resistance (ESR) of 100 Ohms. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00mm x 1.60mm and a maximum height of 0.55mm. The device supports a wide operating temperature range from -40°C to +85°C and is supplied in tape and reel packaging.

Crystals Feature Summary

• Fundamental mode quartz crystal resonator for precise timing applications
• Compact 4-SMD no-lead surface mount package for automated assembly
• Wide industrial temperature rating suitable for harsh environments

Crystals Applications

• Microcontroller clock sources
• Communication module timing references
• Industrial control system oscillators

Crystals Procurement Notes

Verify the specific suffix IKR corresponds to the 8pF load capacitance variant, as other suffixes like IJ may indicate different capacitance values such as 9pF. Confirm that the ±20ppm stability meets the system requirements, noting that tighter tolerances are available in other part numbers within the 402 series. Ensure the 100 Ohm ESR is compatible with the oscillator circuit design to guarantee reliable startup and sustained oscillation.

Crystals Selection Notes

Select this component when a 26 MHz fundamental frequency with moderate ±20ppm stability is required. The 8pF load capacitance must match the external capacitors in the oscillator circuit to achieve accurate frequency performance. Consider the 4-SMD footprint constraints and verify that the 100 Ohm ESR does not exceed the oscillator driver strength limitations. This part is suitable for general-purpose digital logic timing where extreme precision is not critical.

Crystals Part Context

This component belongs to the 402 series of surface-mount crystals from CTS-Frequency Controls. The series offers various frequencies and packages, with the 402F26022IKR specifically providing a 26 MHz output in a small form factor. It is distinct from higher-stability or different-capacitance variants within the same product line, serving as a cost-effective solution for standard timing needs.

Crystals Replacement Considerations

Direct substitutes include 402F26022IAR and 402F26022IJT, though verification of load capacitance differences is essential. The 402F26022IJT typically features 9pF load capacitance, which may require circuit adjustment. Ensure any replacement maintains the 26 MHz frequency, ±20ppm stability, and compatible ESR specifications.