18QHTF21-20.571-PD

Oscillators Overview

The 18QHTF21-20.571-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, operating at a fixed frequency of 20.571 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a power-down capability via a standby control input. It is housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.00mm x 1.60mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient applications
• Includes standby mode functionality to reduce power consumption during idle periods
• Provides stable LVCMOS signal output suitable for digital clocking requirements

Oscillators Applications

• Embedded systems requiring precise timing references
• Consumer electronics utilizing low-power microcontrollers
• Communication modules needing stable clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the PCB footprint matches the 4-SMD, No Lead package dimensions of 2.00mm x 1.60mm to ensure proper assembly and electrical connectivity.

Oscillators Selection Notes

Select this component when a fixed 20.571 MHz clock source is required with minimal power consumption. The integrated standby feature makes it suitable for battery-operated devices where power management is critical. Ensure compatibility with LVCMOS interfaces and verify that the 1.8V operating voltage meets the target system specifications without additional level shifting.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies within a small form factor. The 'PD' suffix indicates the inclusion of a power-down pin or function, distinguishing it from standard continuous-operation variants within the same physical package family.

Oscillators Replacement Considerations

Direct replacements must match the 20.571 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if available in official datasheets.