18QHTF21-85.450-OE

Overview

The 18QHTF21-85.450-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 85.45 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an active enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm. This configuration supports surface-mount assembly processes suitable for high-density PCB layouts.

Feature Summary

• Integrates LVCMOS output interface for digital signal compatibility
• Includes hardware enable and disable pin for power management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital clock generation in embedded systems
• Timing reference for microcontrollers
• Data communication interface synchronization

Procurement Notes

Verify the specific ordering suffix OE against the manufacturer's current datasheet to confirm the exact package variant and enable functionality. Ensure the required 1.6mm height fits within the mechanical constraints of the target design. Cross-reference the 85.45 MHz frequency tolerance specifications with system timing requirements before finalizing procurement orders.

Selection Notes

Select this component when a low-profile 2.0x1.6mm footprint is required for space-constrained designs. The 1.8V supply voltage makes it suitable for modern low-power digital circuits. The integrated enable feature provides an advantage in battery-operated devices where power conservation is critical during idle states compared to continuously running oscillators.

Part Context

This part belongs to the Mercury Electronics SMD oscillator series, which focuses on small form factors. The '18' prefix typically indicates the 1.8V supply voltage class, while 'QHTF' denotes the specific series characteristics. The model is distinct from higher voltage variants like the 3.3V 3QHTF32 series, offering a specialized solution for low-voltage logic families.

Replacement Considerations

Direct substitutes must match the 85.45 MHz frequency, 1.8V supply, and 2.0x1.6mm package. Verify that alternative sources provide identical LVCMOS drive strength and enable pin logic levels to ensure circuit compatibility without hardware modification.