18QHTF21-1.2864-OE

Overview

The 18QHTF21-1.2864-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.2864 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for digital signal compatibility
• Integrated enable and disable control functionality
• Compact 4-SMD no-lead surface mount packaging

Applications

• General clock generation for embedded systems
• Timing reference for low-frequency digital circuits
• Consumer electronics requiring stable 1.2864 MHz signals

Procurement Notes

Verify the specific frequency suffix matches the required 1.2864 MHz operation. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the LVCMOS output level is compatible with downstream logic inputs. Check the enable/disable pin configuration against the schematic requirements to guarantee proper power management integration during procurement.

Selection Notes

Select this component when a stable 1.2864 MHz clock source is required for 1.8V logic families. The LVCMOS output ensures direct interfacing with standard digital components without additional level shifting. The enable feature allows for power optimization in battery-operated applications. Consider the small form factor for space-constrained PCB layouts.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies including 8.64 MHz and 100.64 MHz variants. All models share similar packaging and electrical characteristics, differing primarily in operating frequency and specific application tuning.

Replacement Considerations

Direct substitutes include other 1.2864 MHz LVCMOS oscillators in 4-SMD packages. Verify voltage tolerance and enable pin polarity before swapping. Cross-reference with Mercury's other series if lead-free or specific temperature range requirements differ.