7R-25.000MAAQ-T

Crystals Overview

The 7R-25.000MAAQ-T is a parallel fundamental quartz crystal manufactured by TXC Corporation, designed for surface-mount applications. It operates at a nominal frequency of 25 MHz with a frequency tolerance and stability of ±30 ppm at 25°C and across the operating temperature range of -20°C to +70°C. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 150 Ohms. Physical dimensions are 2.05 mm in length, 1.65 mm in width, and 0.6 mm in height. It utilizes a glass-sealed ceramic package with four SMD pads and supports a drive level of 10 µW.

Crystals Feature Summary

• Utilizes glass-sealing technology for high reliability and environmental performance
• Compact surface-mount design suitable for portable consumer electronics
• Fundamental parallel resonance mode operation

Crystals Applications

• Reference clocks for digital cameras
• Clock sources for USB interfaces
• Timing components for notebook computers
• Oscillators for compact portable consumer products

Crystals Procurement Notes

Verify that the specific suffix 'AAQ' corresponds to the 10 pF load capacitance variant, as other suffixes in the 7R series may indicate different capacitance values such as 18 pF. Confirm RoHS compliance status and check for lead content exemptions in the sealing glass. Ensure the operating temperature range of -20°C to +70°C meets the target application requirements before procurement.

Crystals Selection Notes

Select this component when a 25 MHz reference clock is required for space-constrained designs. The 2.05 x 1.65 mm footprint allows for dense PCB layouts. Consider the ±30 ppm stability specification against system timing requirements. The 10 pF load capacitance must match the oscillator circuit design. Verify compatibility with SMD reflow soldering processes due to the glass-sealed construction.

Crystals Part Context

This part belongs to the 7R series of SMD glass-sealed quartz crystals from TXC Corporation. The series is characterized by its small form factor and robust construction using ceramic substrates and glass sealing. These crystals are engineered to provide stable frequency references for modern electronic devices where size and reliability are critical constraints.

Crystals Replacement Considerations

The 7R-25.000MAAJ-T is a similar variant within the same series but features an 18 pF load capacitance instead of 10 pF. Substitution requires verification that the host circuit's load capacitance matches the replacement part's specification to ensure accurate frequency operation.