18QHTF21-12.159-PD

Overview

The 18QHTF21-12.159-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.159 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 assembly. The component is designed for timing applications requiring precise clock signals within the specified electrical parameters.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode to reduce power consumption
• Surface-mount 4-SMD no-lead package design

Applications

• General-purpose digital circuit timing
• Microcontroller clock sources
• Communication equipment signal generation

Procurement Notes

Verify the specific ordering suffix and frequency tolerance against project requirements. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD footprint matches the PCB layout. Check for RoHS compliance status if required by regulatory standards. Validate the operating temperature range suitability for the intended environment.

Selection Notes

Select this component when a 12.159 MHz clock signal is required with low-voltage operation. Consider the LVCMOS output for direct interfacing with standard digital logic families. Evaluate the power-down feature if battery life or thermal management is critical. Compare the physical dimensions of the 4-SMD package against available board space constraints.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz-based timing components including crystals, oscillators, and filters. The 18QHTF21 series represents their surface-mount oscillator offerings, designed for reliability and precision in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 12.159 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and voltage levels before substitution. Cross-reference specifications for frequency stability and load capacitance requirements.