18QHTF21-32.768-PD

Oscillators Overview

The 18QHTF21-32.768-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 32.768 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and an integrated standby or power-down function to minimize energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes. This specific model represents a precision timing solution optimized for portable electronics and battery-operated systems requiring accurate clock signals with minimal power draw.

Oscillators Feature Summary

• Integrates LVCMOS output interface for direct digital logic compatibility
• Supports standby mode operation to reduce active current consumption
• Utilizes lead-free SMD packaging for automated surface-mount processing

Oscillators Applications

• Portable consumer electronics requiring precise timekeeping
• Battery-powered embedded systems needing low-power clock sources
• Digital communication interfaces utilizing standard CMOS logic levels

Oscillators Procurement Notes

Verify the exact operating temperature range and load capacitance requirements against your specific circuit design before procurement. Ensure that the 1.8V supply rail remains stable within specified tolerances to maintain frequency accuracy. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent soldering defects. Check for any specific reflow profile recommendations to avoid thermal damage to the crystal element during assembly.

Oscillators Selection Notes

Select this component when a 32.768 MHz reference signal is required for real-time clocks or frequency division chains. The 1.8V supply requirement makes it suitable for modern low-voltage digital cores. Consider the standby feature if power management is critical for the end product. Evaluate the 4-SMD package size constraints against available board space. Ensure the LVCMOS output swing is compatible with the input thresholds of the receiving microcontroller or FPGA.

Oscillators Part Context

Mercury Electronics Ind. Co. Ltd has manufactured frequency control products since 1973, establishing itself as a pioneer in the quartz crystal industry in Taiwan. The company produces a wide range of components including quartz crystals, TCXOs, VCTCXOs, VCXOs, OCXOs, and monolithic crystal filters. The 18QHTF21 series falls under their standard XO offerings, designed to provide reliable timing solutions for various electronic applications.

Oscillators Replacement Considerations

Direct substitutes include other 32.768 MHz LVCMOS oscillators in similar 4-SMD packages from manufacturers such as Epson, NDK, or SiTime, provided they match the 1.8V supply and pinout configuration. Verify that any replacement part supports the same standby functionality and meets the required frequency stability specifications for the application.