18QHTF21-81.250-PD

Overview

The 18QHTF21-81.250-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 81.250 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode for power reduction
• Provides LVCMOS signal output

Applications

• Battery-powered electronic devices
• Portable consumer electronics
• General-purpose digital timing circuits

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 4-SMD no-lead package footprint matches the target PCB layout. Ensure the 1.8V supply rail meets the current requirements specified in the manufacturer's documentation to guarantee stable oscillator performance.

Selection Notes

Select this component when a precise 81.250 MHz clock source is required within space-constrained designs. The choice is driven by the need for low voltage compatibility and integrated power-down capabilities. Engineers should evaluate the trade-off between the small 2.0x1.6mm form factor and the specific electrical characteristics defined for this model.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, a supplier specializing in quartz crystals and oscillators. The series typically offers various frequencies within a standardized surface-mount package. This specific model represents one of many frequency options available in the lineup, sharing common physical and logical attributes with other variants.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with identical pinouts and 1.8V LVCMOS outputs, such as the 18QHTF21-68.18181-PD or 18QHTF21-10.041-PD, provided the frequency difference is acceptable for the application.