ATS40A

Crystals Overview

The ATS40A is a 40 MHz crystal resonator manufactured by CTS-Frequency Controls, designed for through-hole mounting in the HC-49/US package. It operates in third overtone mode with a load capacitance of 20 pF and an equivalent series resistance (ESR) of 80 Ohms. The component offers a frequency tolerance of ±30 ppm and stability of ±50 ppm across a temperature range of -20°C to +70°C. Dimensions are 10.85mm x 4.50mm x 3.68mm max.

Crystals Feature Summary

• Third overtone operation for stable high-frequency performance
• Through-hole HC-49/US package for robust mechanical mounting
• Compliant with RoHS3 standards and REACH regulations

Crystals Applications

• Microcontroller clock sources
• Communication equipment timing circuits
• Industrial control system oscillators

Crystals Procurement Notes

Verify the specific ordering suffix required for your application, as standard packaging may vary between tape-and-reel and bulk configurations. Confirm that the manufacturer's standard lead time aligns with production schedules, as immediate stock availability is not guaranteed. Ensure the selected variant meets all environmental compliance requirements for your target market.

Crystals Selection Notes

Select this component when a 40 MHz fundamental frequency is required using a third overtone mode within a standard HC-49/US housing. Consider the 80 Ohm ESR and 20 pF load capacitance for circuit compatibility. Verify that the operating temperature range of -20°C to +70°C suits the intended environment before finalizing the design.

Crystals Part Context

The ATS40A belongs to the ATS series of crystals from CTS-Frequency Controls. This series provides reliable frequency control solutions for general-purpose electronic applications. The part is currently active and supported by official datasheets detailing electrical characteristics and mechanical drawings for integration into printed circuit boards.

Crystals Replacement Considerations

ATS40A-E is listed as a direct substitute by the same manufacturer. ATS400B is identified as a similar alternative. Verify pin compatibility and electrical specifications before swapping components to ensure circuit integrity.

Crystals FAQ

What is the operating mode of the ATS40A?

The ATS40A operates in third overtone mode.

What is the maximum height for installation?

The maximum installation height is 0.145 inches (3.68 mm).