18QHTF21-12.1859-PD

Overview

The 18QHTF21-12.1859-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.1859 MHz with an LVCMOS output signal. The device functions on a 1.8V supply voltage and supports a standby or power-down mode. It features a frequency stability of ±50ppm and operates within a temperature range of -40°C to 85°C. The maximum supply current is 22mA. The component utilizes a surface-mount 4-SMD, no-lead package with dimensions of 2.00mm x 1.60mm.

Feature Summary

• Supports low-voltage operation at 1.8V with integrated standby functionality
• Provides stable timing signals via LVCMOS output interface
• Designed for industrial temperature environments ranging from -40°C to 85°C

Applications

• Industrial control systems requiring precise timing
• Consumer electronics utilizing low-power oscillators
• Communication devices needing standard frequency references

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against your system requirements before ordering. Confirm that the 1.8V supply voltage aligns with your design constraints. Ensure the 4-SMD no-lead package footprint matches your PCB layout. Cross-reference the manufacturer datasheet for detailed electrical characteristics and reliability data to ensure compatibility.

Selection Notes

Select this component when a 12.1859 MHz reference is required in a compact surface-mount form factor. Consider the 1.8V logic level compatibility with your target microcontrollers or processors. Evaluate the ±50ppm stability requirement against your application's jitter sensitivity. The industrial temperature rating makes it suitable for harsher environments compared to commercial-grade alternatives.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of standard crystal oscillators. The series offers various frequencies and voltage options in a consistent 2.0x1.6mm package. Mercury Electronics specializes in quartz crystals and timing solutions, providing reliable components for global electronic manufacturing.

Replacement Considerations

Check for direct substitutes within the same series, such as 18QHTF21-12.300-PD or 18QHTF21-8.000-PD, if different frequencies are acceptable. Verify pinout and package dimensions for any third-party replacements to ensure mechanical compatibility.