18QHTF21-12.243-PD

Overview

The 18QHTF21-12.243-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 12.243 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features 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.

Feature Summary

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

Applications

• Battery-powered portable devices
• General-purpose digital timing circuits
• Embedded systems requiring low-power 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.

Selection Notes

Select this component when a precise 12.243 MHz clock signal is required with minimal power consumption. The 1.8V operating voltage makes it suitable for modern low-voltage logic families. Ensure the PCB layout supports the 4-SMD no-lead package dimensions for proper thermal and electrical connection.

Part Context

This part belongs to the QHTF series of quartz crystal oscillators from Mercury Electronics. The series is designed for applications requiring stable frequency generation in space-constrained environments. The 'PD' suffix indicates the inclusion of a power-down control feature.

Replacement Considerations

Direct substitutes must match the 12.243 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pin compatibility and electrical specifications with alternative manufacturers before integration.