18QHTF21-81.818-OE

Overview

The 18QHTF21-81.818-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 81.818 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and features an Enable/Disable control pin for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports Enable/Disable functionality via dedicated control pin
• Utilizes LVCMOS output interface for digital compatibility
• Operates on a single 1.8V power supply rail

Applications

• Embedded systems requiring precise timing references
• Communication modules utilizing LVCMOS interfaces
• Portable electronic devices constrained by size and power

Procurement Notes

Verify the specific suffix 'OE' to confirm the presence of the enable/disable function and the 1.8V operating voltage. Ensure the 2.0x1.6 mm footprint matches the target PCB layout. Confirm that the LVCMOS output type aligns with the receiving circuit's input requirements before finalizing procurement.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside active power management capabilities. The small 2.0x1.6 mm package makes it suitable for space-constrained designs. Verify that the 81.818 MHz frequency meets the system clock specifications and that LVCMOS signaling is compatible with the connected logic family.

Part Context

This part belongs to the Mercury Electronics QHTF series of surface-mount crystal oscillators. The series offers various frequencies and package sizes. The 18QHTF21 variant specifically denotes the 1.8V supply voltage and the 2.0x1.6 mm form factor within the manufacturer's product line.

Replacement Considerations

Direct substitutes include other 81.818 MHz LVCMOS oscillators in 2.0x1.6 mm packages with 1.8V operation and enable pins. Examples from other manufacturers must match the pinout and electrical characteristics precisely.