18QHTF21-3.900-PD

Oscillators Overview

The 18QHTF21-3.900-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 3.9 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down function for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy management
• Utilizes LVCMOS output interface

Oscillators Applications

• Battery-powered portable devices
• Low-power consumer electronics
• Embedded systems requiring precise timing

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail is stable to maintain oscillator performance. Confirm that the PCB footprint matches the 4-SMD no-lead package specifications provided in the official datasheet to ensure proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a low-frequency, low-voltage oscillator with power management capabilities is required. The 1.8V supply requirement makes it suitable for modern low-power digital circuits. Consider the small 2.0x1.6 mm package size for space-constrained designs. Verify compatibility with LVCMOS logic levels used in the target application system.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal oscillators. The series offers various frequencies and voltage options. Mercury Electronics is a Taiwan-based manufacturer established in 1973, focusing on frequency control products including crystals, filters, and oscillators.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with matching 3.9 MHz frequency and 1.8V supply, such as those from Mercury United Electronics. Cross-brand replacements must match LVCMOS output, 4-SMD package, and 1.8V operating voltage.