18QHTF21-4.637-PD

Oscillators Overview

The 18QHTF21-4.637-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 4.637 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby power-down mode to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.

Oscillators Feature Summary

• Integrates LVCMOS output interface for direct digital logic compatibility
• Supports standby power-down mode for enhanced energy efficiency
• Utilizes a compact 4-SMD no-lead surface-mount package

Oscillators Applications

• Battery-powered portable electronic devices
• Low-power consumer electronics systems
• Compact embedded timing circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the 4-SMD no-lead footprint matches the PCB layout constraints. Check for any specific operating temperature range limitations required by the application environment.

Oscillators Selection Notes

Select this component when a precise 4.637 MHz clock signal is required with minimal power consumption. The 1.8V operation makes it suitable for modern low-voltage digital systems. Consider the small 2.0x1.6mm package size for high-density board layouts. Evaluate the need for the standby feature if power management is critical to the product lifecycle.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd., a supplier specializing in quartz crystals and timing components. The series offers various frequencies within a standardized small outline package format. Mercury Electronics has established itself as a pioneer in Taiwan's quartz industry, providing reliable frequency control solutions for global markets since 1973.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with identical pinouts and form factors but different frequencies, such as the 18QHTF21-48.0048-PD or 18QHTF21-31.350-PD, provided the system clock requirement changes. Verify electrical compatibility before swapping.