18QHTF21-30.811-PD

Oscillators Overview

The 18QHTF21-30.811-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 30.811 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. A key functional characteristic is the inclusion of a standby mode, which allows for power-down capabilities to conserve energy when the oscillator is not actively driving a load. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Oscillators Feature Summary

• Supports LVCMOS output signal compatibility
• Features integrated standby power-down functionality
• Operates on a single 1.8V supply rail

Oscillators Applications

• General-purpose clock generation for digital circuits
• Timing reference for microcontroller systems
• Low-power embedded device synchronization

Oscillators Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply voltage aligns with the host circuit's power domain. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper solder joint formation and mechanical stability during operation.

Oscillators Selection Notes

Select this component when a precise 30.811 MHz timing source is required for LVCMOS-compatible logic families. The choice is driven by the need for low-voltage operation at 1.8V and the necessity of power management features via the standby pin. Consider the small form factor of the 4-SMD package for space-constrained designs where surface-mount technology is preferred over through-hole alternatives.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics Ind. Co. Ltd, a manufacturer specializing in quartz crystals and oscillators. The series typically offers various frequency options within a standardized physical footprint. The 'PD' suffix indicates the inclusion of power-down or standby control functionality, distinguishing it from continuous-output variants within the same family.

Oscillators Replacement Considerations

Direct replacements must match the 30.811 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as rise/fall times and duty cycle stability. Cross-reference with other manufacturers offering similar low-profile XO components with standby capabilities.