18QHTF21-81.88542-PD

Overview

The 18QHTF21-81.88542-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 81.88542 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a power-down (standby) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient applications
• Includes standby mode capability to reduce power consumption when inactive
• Delivers standard LVCMOS output signals for digital interface compatibility

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference sources for microcontrollers and processors
• Data communication interfaces requiring precise frequency stability

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail meets the current consumption specifications during active and standby states. Confirm that the PCB footprint matches the 2.0x1.6mm SMD no-lead package dimensions to ensure proper assembly and electrical connection.

Selection Notes

Select this component when a small form factor is required alongside low-power operation. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the operating temperature range and frequency stability needs relative to the application environment. The integrated power-down feature makes it ideal for battery-operated devices where standby current minimization is critical.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in producing crystals, oscillators, and filters. This series typically offers various frequencies and supply voltages within a standardized small outline package format designed for surface-mount technology.

Replacement Considerations

Direct substitutes must match the 81.88542 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar small-footprint XO components with identical electrical parameters.