402F400XXCKR

Crystals Overview

The CTS-Frequency Controls 402F400XXCKR is a fundamental mode quartz crystal resonator designed for surface-mount applications. It operates at a nominal frequency of 40 MHz with a frequency tolerance and stability of ±15 ppm. The component features an equivalent series resistance (ESR) of 60 Ohms maximum and requires a load capacitance of 8 pF. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.00 mm x 1.60 mm and a maximum height of 0.55 mm. The device supports a base harmonic operating mode and functions within a temperature range of -20°C to +70°C.

Crystals Feature Summary

• Fundamental mode quartz crystal resonator for precise timing
• Compact 4-SMD no-lead surface-mount package design
• Stable frequency performance with ±15 ppm tolerance
• Low equivalent series resistance for efficient circuit integration

Crystals Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits
• Embedded system oscillators

Crystals Procurement Notes

Verify the specific suffix 'CKR' against the official CTS datasheet to confirm package type and tape/reel specifications. Ensure the load capacitance requirement matches the target circuit design. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Cross-reference the ESR value with oscillator driver strength requirements to prevent over-driving or failure.

Crystals Selection Notes

Select this component when a 40 MHz fundamental frequency is required with tight ±15 ppm stability. The 8 pF load capacitance must align with the oscillator circuit's stray capacitance. The 60 Ohm ESR limit influences the choice of oscillator topology. Consider the -20°C to +70°C operating range against environmental conditions. The small 2.00mm x 1.60mm footprint suits high-density PCB layouts.

Crystals Part Context

This part belongs to the CTS 402 Series of surface-mount crystals. The series offers various frequencies and package options. The 402F400XXCKR specifically targets 40 MHz applications. It shares the standard 4-SMD form factor with other variants in the lineup. The series is designed for general-purpose timing needs.

Crystals Replacement Considerations

Direct substitutes include 402F400XXCAR and 402F40033CKR from CTS-Frequency Controls. Verify that alternative parts match the 40 MHz frequency, 8 pF load capacitance, and 60 Ohm ESR specifications. Ensure the replacement maintains the same 4-SMD package dimensions and operating temperature range.