STDCTX1-26M

Overview

The STDCTX1-26M is a surface-mount crystal oscillator manufactured by NDK. It operates at a fundamental frequency of 26.000 MHz and utilizes an AT-cut quartz resonator element for stable timing performance. The component is housed in a compact SMD package, specifically the STDCT series form factor, designed for automated assembly processes. Key electrical specifications include a load capacitance of 7 pF and a frequency tolerance typically within ±30 ppm at room temperature. The device supports standard drive levels suitable for low-power mobile applications.

Feature Summary

• Provides precise clock signal generation for digital circuit synchronization
• Utilizes AT-cut quartz technology for superior frequency stability over temperature variations
• Designed for direct surface-mount integration into PCB layouts

Applications

• Mobile communication devices requiring stable RF reference clocks
• Wireless networking modules and Bluetooth transceivers
• Embedded systems utilizing microcontrollers with external crystal inputs

Procurement Notes

Verify the specific ordering suffix against the official NDK datasheet to ensure correct packaging quantity and tape-and-reel specifications. Confirm that the load capacitance matches the host circuit design requirements. Check for any RoHS or REACH compliance declarations relevant to your region. Ensure the operating temperature range aligns with the final product environment. Cross-reference the part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a 26 MHz reference is required for GSM or legacy wireless standards. Evaluate the package dimensions against available PCB real estate constraints. Consider the drive level sensitivity to prevent frequency pulling or damage. Compare equivalent parts from other manufacturers if supply chain diversification is necessary. Ensure the host oscillator circuit can support the specified load capacitance without additional tuning.

Part Context

This part belongs to the STDCT series of surface-mount crystals from NDK. The series is characterized by small footprints and high reliability for consumer electronics. It serves as a passive timing element rather than an active oscillator IC. The 26 MHz frequency is historically significant for cellular baseband processing. It differs from active oscillators by requiring an external load circuit.

Replacement Considerations

Consult NDK's official substitution guide for direct equivalents. Generic replacements must match the 26 MHz frequency, 7 pF load capacitance, and physical package dimensions. Verify that alternative brands offer comparable frequency stability and aging rates. Ensure the substitute part supports the same soldering thermal profiles.