7A-27.000MAAJ-T

Crystals Overview

The TXC Corporation 7A-27.000MAAJ-T is a surface-mount quartz crystal resonator operating at a fundamental frequency of 27.000 MHz. It features a frequency tolerance and stability of ±30 ppm, with a load capacitance of 18 pF. The component utilizes a glass-sealed package in a 5.00 mm x 3.20 mm footprint, designed for SMD/SMT installation. It operates within a temperature range of -20°C to +70°C and exhibits an equivalent series resistance (ESR) of 60 Ohms.

Crystals Feature Summary

• Glass-sealed construction provides enhanced environmental stability and resistance to moisture compared to standard ceramic packages.
• Designed for direct integration into standard SMT assembly lines without requiring specialized process adaptations.
• Compliant with RoHS directives, utilizing leaded glass materials that fall under specific regulatory exemptions.

Crystals Applications

• Portable USB data acquisition cards
• NFC readers and wireless communication modules
• Small-size IoT devices and embedded systems

Crystals Procurement Notes

This component is officially discontinued and no longer manufactured by TXC Corporation. Procurement must focus on identifying verified substitute part numbers from current production lines. Verify electrical compatibility, specifically frequency, load capacitance, and ESR, before integrating any replacement into existing designs.

Crystals Selection Notes

Selection should prioritize the 5x3.2mm glass-sealed form factor for superior thermal cycling performance over resin or ceramic alternatives. Ensure the circuit design supports the 18pF load capacitance and 60 Ohm ESR specifications. Consider the -20°C to +70°C operating range against application requirements, as industrial-grade variants may be necessary for wider temperature extremes.

Crystals Part Context

The 7A series represents TXC's line of high-reliability, glass-sealed surface-mount crystals. This specific model targets applications requiring stable clock signals in compact consumer electronics and portable devices where environmental robustness is critical for long-term frequency accuracy.

Crystals Replacement Considerations

Direct substitutes include ECS Inc. part number ECS-270-18-30-GM-TR. Verify pinout compatibility and mechanical dimensions when transitioning to alternative suppliers to ensure seamless PCB reflow soldering.

Crystals FAQ

What is the status of the 7A-27.000MAAJ-T?

The component is obsolete and has been discontinued by the manufacturer.

How does the glass seal affect performance?

It offers higher reliability and better resistance to humidity and stress-induced frequency shifts compared to standard ceramic packages.