18QHTF21-40.985-PD

Oscillators Overview

The 18QHTF21-40.985-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 40.985 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The component supports an operating temperature range suitable for industrial applications, providing reliable clock signal generation for digital circuits requiring precise timing synchronization.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with integrated standby capability
• Delivers LVCMOS output signals for direct interface with digital logic
• Utilizes a miniature 4-SMD no-lead surface-mount package

Oscillators Applications

• Clock signal generation for embedded systems
• Timing reference for communication interfaces
• Power management in portable electronic devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's specifications to maintain frequency accuracy. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet. Check for any specific reflow soldering profile recommendations to ensure component integrity during assembly processes.

Oscillators Selection Notes

Select this model when a precise 40.985 MHz clock source is required for LVCMOS-compatible digital components. Consider the 1.8V supply constraint and the need for power-down functionality in battery-operated designs. Evaluate the 2.0x1.6mm package size against available board space constraints. Compare performance metrics such as phase noise and jitter against system requirements to ensure signal integrity is maintained throughout the operational temperature range.

Oscillators Part Context

This component belongs to the Mercury Electronics 18QHTF21 series of surface-mount oscillators. The series offers various frequencies and voltage options within a standardized small outline package. Mercury Electronics has established itself as a manufacturer of quartz-based frequency control products since 1973. This specific part represents a standard XO variant optimized for low-power applications requiring stable clock signals in compact form factors.

Oscillators Replacement Considerations

Direct substitutes must match the 40.985 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pin compatibility and thermal characteristics before swapping manufacturers. Cross-reference with other vendors offering identical electrical parameters and mechanical dimensions to ensure seamless integration without redesigning the PCB layout.