7A-25.000MBBK-T

Crystals Overview

The TXC Corporation 7A-25.000MBBK-T is a surface-mount quartz crystal resonator operating at a fundamental frequency of 25 MHz. It features a 3225 (5.0 mm x 3.2 mm) package with glass sealing for enhanced environmental stability. The component exhibits a frequency tolerance of ±20 ppm and a load capacitance of 20 pF. It supports a parallel capacitance of up to 5 pF and operates within a temperature range of -40°C to +85°C. The unit weighs approximately 16 mg and utilizes SMD/SMT termination.

Crystals Feature Summary

• Glass-sealed construction provides superior resistance to moisture and environmental stress compared to standard ceramic or resin packages.
• Designed for high reliability in portable electronic applications, maintaining frequency stability through thermal cycling and reflow soldering processes.
• Optimized for low power consumption with a typical drive level of 100 µW, suitable for battery-operated devices.

Crystals Applications

• Portable USB data acquisition cards
• NFC readers and smart card interfaces
• Small-size IoT sensor modules
• Digital cameras and PDAs

Crystals Procurement Notes

Verify the specific suffix 'BBK' against official datasheets to confirm the exact load capacitance and tolerance specifications, as variations exist within the 7A series. Ensure compatibility with standard SMT reflow profiles. Confirm RoHS compliance status, noting that leaded glass seals may fall under specific exemptions depending on regional regulations. Validate supply chain authenticity through authorized distributors.

Crystals Selection Notes

Select this component when high environmental stability is required for compact designs. The 3225 footprint balances size constraints with robust performance. Consider the 20 pF load capacitance for circuit matching; if the target MCU requires 18 pF, verify if external trimming is necessary or if a different variant like MAHJ is more appropriate. Evaluate the ±20 ppm tolerance against system clock accuracy requirements.

Crystals Part Context

The 7A series represents TXC's line of high-reliability, glass-sealed surface-mount crystals. This model is part of a family designed to overcome the frequency drift issues associated with standard ceramic-packaged crystals during thermal stress. It targets applications demanding long-term stability and resistance to humidity, distinguishing it from lower-cost, non-sealed alternatives.

Crystals Replacement Considerations

For direct pin-compatible replacements with similar glass-seal properties, consider the 7M-25.000MAHJ-T, though it differs in load capacitance (18 pF vs 20 pF). Verify circuit compatibility before substituting, as load capacitance changes affect oscillation frequency.