18QHTF21-19.940-PD

Oscillators Overview

The 18QHTF21-19.940-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 19.94 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby mode for power reduction
• Utilizes LVCMOS output interface

Oscillators Applications

• General-purpose digital circuit timing
• Embedded system clock generation
• Consumer electronics signal processing

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet to ensure reliable oscillator performance and longevity.

Oscillators Selection Notes

Select this component when a precise 19.94 MHz reference is required with low-power constraints. Ensure the host circuit supports LVCMOS signaling standards. Verify that the 4-SMD footprint matches the PCB layout guidelines provided by the manufacturer to guarantee proper soldering and mechanical stability.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronic. The series typically offers various frequency options within a standardized small form factor. The 'PD' suffix indicates the inclusion of a power-down control feature, distinguishing it from continuous-operation variants.

Oscillators Replacement Considerations

Direct substitutes must match the 19.94 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Cross-reference pinouts and electrical characteristics carefully to ensure compatibility without redesigning the host board.