18QHTF21-70.65104-PD

Overview

The 18QHTF21-70.65104-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 70.65104 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby functionality for power management
• Provides LVCMOS output signal compatibility

Applications

• Digital clock generation systems
• Data communication interfaces
• Microprocessor timing circuits

Procurement Notes

Verify the specific ordering suffix to ensure the correct frequency tolerance and load capacitance requirements are met for your design. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint guidelines. Check the manufacturer's latest documentation for any updates on RoHS compliance status and recommended soldering profiles to ensure reliable assembly and long-term performance.

Selection Notes

Choose this component when a stable 70.65104 MHz reference is required in space-constrained designs. The LVCMOS interface simplifies integration with standard digital logic families. Ensure the system can accommodate the 1.8V supply rail and that the thermal characteristics of the small outline package meet the operating environment constraints.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options within similar form factors. This specific model represents a mid-range frequency option optimized for consumer and industrial electronics where size and power efficiency are critical design parameters.

Replacement Considerations

Direct pin-to-pin replacements may include other Mercury models within the same series with identical package dimensions but different frequencies. Cross-brand substitutes require verification of output voltage levels, pinout configurations, and frequency stability specifications to ensure functional equivalence.