7M40090012

Crystals Overview

The TXC CORPORATION 7M40090012 is a surface-mount quartz crystal resonator designed for high-precision frequency control applications. Operating at a fundamental frequency of 40 MHz, this component features a load capacitance of 11.5 pF and offers a frequency tolerance of ±30 ppm with stability of ±30 ppm. It utilizes a 4-SMD, no-lead package measuring 3.2 mm x 2.5 mm x 0.8 mm maximum height. The device supports a base harmonic mode with an equivalent series resistance (ESR) of 60 Ohms and operates within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Compact 4-SMD surface-mount footprint suitable for space-constrained PCB layouts
• High-frequency stability and precision for reliable timing reference generation
• Robust construction supporting standard reflow soldering processes

Crystals Applications

• Microcontroller clock source circuits
• Communication interface timing references
• Digital signal processing system clocks

Crystals Procurement Notes

Verify the specific suffix and tolerance requirements against the design schematic before ordering. Confirm that the 11.5 pF load capacitance matches the oscillator circuit design. Ensure the operating temperature range meets the environmental specifications of the final application. Check for RoHS compliance status if required by regulatory standards.

Crystals Selection Notes

Select this component when a 40 MHz fundamental frequency is required in a small SMD package. Compare the 60 Ohm ESR against the oscillator's drive level specifications to ensure stability. Evaluate the ±30 ppm tolerance against the system's jitter and phase noise requirements. Consider the 3.2x2.5 mm dimensions for board space optimization compared to larger through-hole alternatives.

Crystals Part Context

This part belongs to the TXC 7M series of seam-sealing crystals, which are characterized by their small size and high reliability. The series is widely used in consumer electronics and industrial equipment requiring precise timing. The 7M series typically offers various frequency options within the same compact form factor, allowing for standardized BOMs across different product variants.

Crystals Replacement Considerations

Direct substitutes include other 40 MHz crystals with identical 3.2x2.5 mm packages and 11.5 pF load capacitance. Verify that alternative parts match the 60 Ohm ESR and ±30 ppm tolerance to maintain circuit performance. Ensure the replacement part supports the same operating temperature range and mounting style.