18QHTF21-8.450-OE

Overview

The 18QHTF21-8.450-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 8.45 MHz and utilizes LVCMOS output logic levels. The device is powered by a single 1.8V supply voltage and features an active-low enable/disable control pin for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for surface-mount assembly and supports an operating temperature range suitable for commercial applications.

Feature Summary

• Integrated enable/disable functionality via dedicated control pin
• Compact 4-SMD no-lead surface mount package design
• LVCMOS output compatibility for digital interface integration

Applications

• Portable electronic devices requiring low power consumption
• Communication modules utilizing standard clock signals
• Embedded systems with limited voltage supply rails

Procurement Notes

Verify the specific suffix 'OE' indicates the enable feature when sourcing replacements. Confirm that the 1.8V supply requirement matches the target circuit design. Ensure the 4-SMD footprint aligns with the PCB layout specifications. Check manufacturer documentation for precise reflow soldering profiles to maintain component integrity during assembly processes.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside an enable control feature. The small 2.0x1.6mm package is ideal for space-constrained designs. Ensure the application does not require spread spectrum or differential outputs, as this model provides standard LVCMOS signals. Validate thermal performance against the specified operating temperature range for the intended environment.

Part Context

This part belongs to the Mercury Electronic 18QHTF series of quartz crystal oscillators. The series offers various frequencies and voltage options within a standardized small outline package format. The '18' prefix typically denotes the 1.8V supply voltage variant, while 'QHTF' indicates the specific package type and technology generation used by the manufacturer for timing solutions.

Replacement Considerations

Direct substitutes include other 8.45 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation and enable pins. Verify pinout compatibility and electrical characteristics before substitution. Generic equivalents may lack the specific enable functionality or exact dimensional tolerances.