18QHTF21-6.600-PD

Overview

The 18QHTF21-6.600-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 6.6 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm. This component is suitable for applications requiring precise timing signals within portable electronic systems.

Feature Summary

• Supports low-voltage operation at 1.8V for energy efficiency
• Integrates a power-down mode to minimize current draw during idle states
• Delivers stable LVCMOS clock signals for digital circuit synchronization

Applications

• Portable consumer electronics
• Battery-powered devices
• Communication modules
• Embedded control systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD package footprint matches your PCB layout constraints. Request the official datasheet from Mercury Electronic for detailed electrical characteristics and reliability data.

Selection Notes

Select this model when a 6.6 MHz clock source is required with minimal power consumption. The integrated power-down feature makes it ideal for battery-operated devices where standby current is critical. Ensure compatibility with LVCMOS logic levels used in the target application. Consider the small form factor for space-constrained designs.

Part Context

Mercury Electronic Ind. Co., Ltd. is a Taiwan-based manufacturer specializing in frequency control products, including quartz crystals and oscillators. The 18QHTF21 series represents their line of surface-mount crystal oscillators designed for modern electronic applications. This specific part number denotes a 6.6 MHz variant within the standard XO category.

Replacement Considerations

Direct substitutes include other 6.6 MHz LVCMOS oscillators in 3.2x2.5mm packages from compatible manufacturers. Verify pinout compatibility and electrical specifications before substitution. Alternative part numbers such as those from similar families may require schematic review.