18QHTF21-36.621-PD

Oscillators Overview

The 18QHTF21-36.621-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 36.621 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Oscillators Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output interface for digital circuit compatibility
• Includes standby mode functionality to reduce power consumption during idle periods
• Utilizes surface-mount technology for automated assembly integration

Oscillators Applications

• General clock signal generation for embedded systems
• Timing reference for microcontrollers and processors
• Data communication interface synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply rail is stable within the operational specifications. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to prevent soldering defects. Cross-reference the part number suffix to confirm availability of the power-down feature implementation.

Oscillators Selection Notes

Select this component when a low-profile, 1.8V LVCMOS oscillator is required for space-constrained designs. Consider the operating temperature range limits defined in the official datasheet for environmental suitability. Evaluate the phase noise characteristics if high-frequency stability is critical for the application. Compare pin-out configurations with existing board layouts to ensure mechanical compatibility.

Oscillators Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The series is characterized by small form factors suitable for portable electronics. Mercury Electronics has a long history in Taiwan's crystal manufacturing industry, providing standardized oscillator solutions for various consumer and industrial applications.

Oscillators Replacement Considerations

Direct substitutes must match the 36.621 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify equivalent electrical parameters such as frequency stability and drive level. Check for compatible mounting pads and thermal characteristics to ensure seamless integration without redesign.