18QHTF21-51.800-OE

Overview

The 18QHTF21-51.800-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 51.8 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage range that includes 1.8V operation and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions consistent with the SMD2016 form factor. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes enable/disable control functionality for power optimization
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation in embedded systems
• Timing reference for microcontrollers operating at 1.8V
• Digital communication interfaces requiring stable frequency sources

Procurement Notes

Verify the specific supply voltage requirements against the target system design to ensure compatibility with the 1.8V operation mode. Confirm that the LVCMOS output levels match the input thresholds of the receiving circuitry. Ensure the PCB layout accommodates the 4-SMD no-lead package dimensions and thermal requirements specified in the official datasheet. Check for any specific handling instructions related to the surface mount technology used.

Selection Notes

Select this component when a 51.8 MHz clock source is required with low voltage operation capabilities. The enable/disable feature makes it suitable for battery-powered or power-sensitive applications where standby current reduction is necessary. Consider the physical size constraints of the SMD2016 package during mechanical design. Evaluate the need for LVCMOS outputs versus other logic families based on the connected load.

Part Context

This oscillator belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer has extensive experience in quartz crystal and oscillator production. The part number suffix indicates specific electrical and packaging characteristics defined by the company's internal coding system for this product line.

Replacement Considerations

Direct substitutes must match the 51.8 MHz frequency, LVCMOS output type, 1.8V supply capability, and 4-SMD no-lead package footprint. Verify pinout compatibility and enable/disable logic polarity before substitution. Cross-reference with other manufacturers offering similar SMD2016 oscillators if availability is an issue.