18QHTF21-28.000-PD

Oscillators Overview

The 18QHTF21-28.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 28 MHz and utilizes LVCMOS output logic. 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 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals in space-constrained electronic systems.

Oscillators Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Features a dedicated standby mode to reduce power consumption during idle periods
• Utilizes a leadless surface-mount package for automated assembly efficiency

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Data communication interfaces requiring stable clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly and long-term performance stability.

Oscillators Selection Notes

Select this model when a low-voltage 1.8V operation is required alongside a standard LVCMOS output. The small 2.0x1.6mm footprint makes it suitable for dense PCB layouts where space is limited. Consider the power-down feature if battery life or thermal management is a critical factor in the application design. Verify that the operating temperature range meets the environmental conditions of the intended deployment scenario.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a consistent small form factor. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants. This family targets consumer electronics and portable devices requiring efficient timing solutions.

Oscillators Replacement Considerations

Direct substitutes must match the 28MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Cross-reference with other manufacturers offering similar small-footprint oscillators with standby functionality.