18QHTF21-27.808-PD

Oscillators Overview

The 18QHTF21-27.808-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 27.808 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby power-down functionality
• Utilizes LVCMOS output logic interface

Oscillators Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints to guarantee proper soldering and mechanical stability during assembly processes.

Oscillators Selection Notes

Select this component when a precise 27.808 MHz clock source is required for low-power applications. The 1.8V operating voltage makes it suitable for modern portable or battery-operated devices. Consider the small 2.0x1.6 mm form factor for space-constrained designs. Verify compatibility with LVCMOS logic levels used in the receiving digital circuits to ensure signal integrity.

Oscillators Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a standardized small outline package. The 'PD' suffix indicates the inclusion of a power-down control feature, allowing for active and inactive states to manage power consumption effectively in dynamic systems.

Oscillators Replacement Considerations

The 25QHTF21-27.808-PD is a documented alternative offering identical frequency but operating at 2.5V. Ensure the system voltage supports this change. No other direct substitutes are confirmed in available public documentation.