8Q-40.000MDDY-T

Crystals Overview

The 8Q-40.000MDDY-T is a seam seal MHz quartz crystal manufactured by TXC Corporation, designed for surface-mount applications. It operates at a fundamental frequency of 40 MHz with a load capacitance of 7 pF and an equivalent series resistance (ESR) of 80 Ohms. The component provides a frequency stability of ±20 ppm at 25°C and ±20 ppm over the operating temperature range of -20°C to +70°C. Housed in a compact 4-SMD, no-lead package measuring 1.6 mm x 1.2 mm, it utilizes ceramic construction.

Crystals Feature Summary

• Ultra-miniature form factor suitable for space-constrained designs
• High accuracy with low aging characteristics
• Low series resistance for efficient circuit integration

Crystals Applications

• General purpose clock signal generation
• Telecommunications equipment timing
• Consumer electronics internal clocks

Crystals Procurement Notes

Verify the specific load capacitance requirement of 7 pF against the target circuit design to ensure accurate frequency operation. Confirm that the operating temperature range of -20°C to +70°C aligns with the environmental conditions of the end application. Ensure the PCB footprint matches the 1.6x1.2 mm SMD dimensions to prevent assembly errors during manufacturing.

Crystals Selection Notes

Select this component when a small footprint and high stability are required for 40 MHz applications. It is appropriate for designs needing ±20 ppm stability within a limited temperature window. Consider the 80 Ohm ESR value for oscillator circuit compatibility. This part is ideal for replacing larger through-hole crystals or older SMD variants requiring reduced board space.

Crystals Part Context

This part belongs to the TXC 8Q series of ultra-miniature quartz crystals. The series emphasizes thin profiles and low series resistance while maintaining high Q factors and low phase noise. These components are engineered for modern electronics demanding miniaturization without compromising signal integrity or frequency precision.

Crystals Replacement Considerations

Direct substitutes include other 40 MHz crystals with identical 7 pF load capacitance and ±20 ppm stability. Verify that alternative parts support the same 1.6x1.2 mm package and 80 Ohm ESR specifications to maintain circuit performance.