18QHTF21-7.39739-PD

Overview

The 18QHTF21-7.39739-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.39739 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 with dimensions of 2.00mm x 1.60mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby mode for power reduction
• Provides LVCMOS signal output compatibility

Applications

• General timing circuits requiring precise clock signals
• Embedded systems utilizing low-power microcontrollers
• Portable electronic devices necessitating compact form factors

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system's power architecture. Ensure the 4-SMD package footprint matches the PCB design constraints to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a small surface-mount oscillator is required for 1.8V logic interfaces. Consider the 7.39739 MHz frequency specifically for applications needing this exact timing reference. Evaluate the standby feature if power conservation is critical for the end product's operational profile.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies within a standardized 3.2x2.5mm package format. These components are designed for high-reliability timing applications in consumer and industrial electronics where space and power efficiency are primary design drivers.

Replacement Considerations

Direct substitutes must match the 7.39739 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify pinout compatibility and electrical specifications from alternative manufacturers to ensure seamless integration without circuit redesign.