18QHTF21-40.610-OE

Oscillators Overview

The 18QHTF21-40.610-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 40.61 MHz with a frequency stability of ±50 ppm. The device requires a 1.8V supply voltage and supports an enable/disable control function. It is designed for operation within a temperature range of -40°C to +85°C. The component utilizes an LVCMOS output signal type and is housed in a compact 4-SMD, No Lead package.

Oscillators Feature Summary

• Supports active enable and disable control functionality via dedicated pin
• Generates LVCMOS output signals suitable for digital logic interfaces
• Operates on a low 1.8V power supply rail
• Provides stable timing performance across extended industrial temperature ranges

Oscillators Applications

• Clock generation for embedded microprocessors
• Timing reference for communication interface circuits
• Synchronization sources for data acquisition systems
• Power management controller clock inputs

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power architecture. Ensure the 4-SMD no-lead package dimensions fit within your PCB footprint constraints. Check for any specific reflow soldering profile recommendations provided in the manufacturer datasheet to ensure reliable assembly.

Oscillators Selection Notes

Select this component when a precise 40.61 MHz reference is required for low-voltage digital applications. The ±50 ppm stability is adequate for most standard synchronous bus protocols. Consider the enable/disable feature if power conservation during idle states is necessary. The wide operating temperature range makes it suitable for environments subject to thermal variation without requiring more expensive TCXO solutions.

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, all sharing the same compact 4-pin form factor. This specific model represents a mid-range frequency option optimized for 1.8V logic families, distinguishing it from higher voltage or different frequency variants within the same product line.

Oscillators Replacement Considerations

Direct replacements must match the 40.61 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify that substitute components offer equivalent ±50 ppm stability and -40°C to +85°C temperature ratings. Cross-reference pinouts to ensure enable/disable functionality compatibility. Generic XO replacements may lack the specific enable pin configuration.