18QHTF21-19.920408-PD

Oscillators Overview

The 18QHTF21-19.920408-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 19.920408 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes a power-down feature controlled via the Enable/Disable pin. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm, suitable for surface-mount applications requiring precise frequency generation.

Oscillators Feature Summary

• Provides stable frequency generation at 19.920408 MHz using LVCMOS output interface
• Operates on a low voltage supply of 1.8V to support energy-efficient designs
• Features an integrated power-down capability for standby mode management

Oscillators Applications

• Precision timing circuits requiring specific clock frequencies
• Embedded systems utilizing low-voltage logic interfaces
• Compact electronic devices necessitating small form-factor oscillators

Oscillators Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design specifications before procurement. Ensure that the 1.8V supply rail is stable and within the operational limits defined in the official datasheet. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues. Check for any specific handling instructions related to the no-lead package type during soldering processes.

Oscillators Selection Notes

Select this component when a fixed frequency of 19.920408 MHz is required rather than a programmable or adjustable solution. The choice is driven by the need for a low-profile 4-SMD package and compatibility with 1.8V logic families. Consider the power-down functionality if system-level power management is a priority. Evaluate the thermal and environmental specifications to ensure reliability under operating conditions.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal products. The manufacturer has a long history in the Taiwan quartz industry. This specific model represents a standard XO variant, distinct from VCXOs or TCXOs, focusing on basic frequency stability without temperature compensation or voltage control features.

Oscillators Replacement Considerations

Direct substitutes must match the 19.920408 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package size. Verify pinout compatibility and electrical characteristics such as rise/fall times and duty cycle. Cross-reference part numbers from other manufacturers offering equivalent SMD oscillators with identical form factors and electrical specs.