18QHTF21-12.900-PD

Overview

The 18QHTF21-12.900-PD is a 12.9 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 (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 low-voltage digital systems.

Feature Summary

• LVCMOS output logic for standard digital interfacing
• Integrated standby mode to reduce power consumption
• Compact surface-mount package design

Applications

• General purpose clock generation in embedded systems
• Low-power consumer electronics
• Industrial control modules

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the 4-SMD no-lead package footprint aligns with your PCB layout constraints. Cross-reference the datasheet for operating temperature ranges to ensure environmental compatibility.

Selection Notes

Select this model when a 12.9 MHz clock signal is required with LVCMOS compatibility. Consider the 1.8V operating voltage for low-power designs. The small 2.0x1.6mm package is suitable for space-constrained layouts. Evaluate the need for power-down functionality if battery life or thermal management is critical.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 4-SMD no-lead form factor. The series supports LVCMOS outputs and 1.8V operation, providing a consistent interface for designers working across different clock frequencies while maintaining uniform board space requirements.

Replacement Considerations

Direct substitutes include other 12.9 MHz XO components in 4-SMD packages with LVCMOS outputs and 1.8V operation. Verify pinout compatibility and electrical parameters such as jitter and phase noise before substitution.