18QHTF21-12.548-PD

Overview

The 18QHTF21-12.548-PD is a 12.548 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a standby function for power down control. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface
• 1.8V operating voltage
• Standby power down capability

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design. 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 specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a low-voltage 1.8V LVCMOS oscillator is required for space-constrained designs. The 12.548 MHz frequency suits specific data communication or processing clock needs. Consider the standby feature if power management is critical. Validate that the industry-standard 4-pad SMD form factor fits within the available board area constraints.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various standard frequencies in a small surface-mount package. The series provides reliable quartz-based timing solutions for consumer and industrial electronics. The 'PD' suffix typically indicates specific packaging or handling characteristics defined by the manufacturer.

Replacement Considerations

Direct substitutes must match the 12.548 MHz frequency, 1.8V LVCMOS output, and 4-SMD no-lead package dimensions. Verify equivalent electrical parameters such as phase noise and stability before substitution.