7R-25.000MDDK-T

Crystals Overview

The TXC Corporation 7R-25.000MDDK-T is a surface-mount quartz crystal resonator operating at a nominal frequency of 25 MHz. It features a compact 4-SMD, no-lead package with dimensions of 2.0 mm x 1.6 mm and a height of 0.75 mm. The component utilizes glass sealing technology for environmental reliability. Key electrical specifications include a load capacitance of 18 pF, a frequency tolerance of ±20 ppm at 25°C, and a series resistance (ESR) of 150 Ohms. It is designed for operation within a temperature range of -20°C to +70°C.

Crystals Feature Summary

• Glass-sealed construction for enhanced environmental stability
• Compact 4-pin SMD footprint suitable for space-constrained designs
• Fundamental parallel resonance mode operation

Crystals Applications

• Reference clock sources for portable consumer electronics
• Timing circuits in digital signal processing systems
• Clock generation for USB interface controllers

Crystals Procurement Notes

Verify the specific suffix 'T' indicates reel packaging when placing orders. Confirm that the 150 Ohm ESR matches the oscillator circuit requirements. Ensure the -20°C to +70°C operating range aligns with the target application's thermal environment. Check RoHS compliance status regarding lead content in the sealing glass as per manufacturer declarations.

Crystals Selection Notes

Select this component when a small form factor is required alongside moderate frequency stability. The 18 pF load capacitance must match the external capacitors in the host circuit design. Consider the higher ESR compared to larger packages when driving low-power oscillators. Verify that the ceramic substrate type meets the mechanical stress requirements of the assembly process.

Crystals Part Context

This part belongs to the 7R series of miniature quartz crystals from TXC Corporation. The series is characterized by its small 2.0x1.6 mm footprint and glass-sealed hermetic packaging. It serves as a cost-effective timing solution for mass-produced electronic devices where board space is limited but standard industrial temperature performance is sufficient.

Crystals Replacement Considerations

Direct substitutes must maintain the 25 MHz frequency, 18 pF load capacitance, and 2.0x1.6 mm package dimensions. Parts with lower ESR may require circuit adjustment. Verify that alternative suppliers offer equivalent glass-sealing technology for comparable environmental durability.