18QHTF21-1.9521-OE

Overview

The 18QHTF21-1.9521-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.9521 MHz and utilizes an LVCMOS output interface. The device requires a 1.8V supply voltage and includes enable/disable functionality for power management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications. The component supports an operating temperature range of -40°C to 85°C and offers frequency stability of ±50ppm.

Feature Summary

• LVCMOS output interface
• Enable/Disable control function
• Compact 4-SMD No Lead package

Applications

• General-purpose timing circuits
• Embedded systems requiring low-power oscillators
• Consumer electronics with space constraints

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 rails. Ensure the 4-SMD No Lead package footprint matches your PCB layout guidelines. Check for any specific handling or storage instructions provided in the manufacturer datasheet to maintain component integrity during assembly.

Selection Notes

Select this component when a precise 1.9521 MHz clock signal is required in a small form factor. The LVCMOS output ensures compatibility with standard digital logic families. Consider the ±50ppm stability for applications where moderate frequency accuracy is sufficient. The enable/disable feature allows for dynamic power saving in battery-operated devices. Verify thermal performance within the specified -40°C to 85°C range for your environment.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent electrical characteristics and packaging. These oscillators are designed for cost-effective timing solutions in mass-produced electronic goods. The 'OE' suffix typically denotes a specific ordering or revision code defined by the manufacturer.

Replacement Considerations

Direct replacements must match the 1.9521 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD No Lead package. Verify pinout compatibility and electrical parameters such as current consumption and startup time. Cross-reference with other manufacturers offering similar XO specifications if Mercury stock is unavailable.