18QHTF21-21.165824-PD

Oscillators Overview

The 18QHTF21-21.165824-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 21.165824 MHz and utilizes an LVCMOS output signal format. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. A key operational characteristic is the inclusion of a standby or power-down mode to manage energy consumption when the oscillator is not actively required. The component is housed in a compact 4-SMD, no-lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• Supports LVCMOS output interface for digital logic compatibility
• Features a dedicated standby or power-down control mode
• Operates on a single 1.8V power supply rail
• Utilizes a small-footprint 4-SMD no-lead package

Oscillators Applications

• Digital clock signal generation for microprocessors
• Timing reference for communication interfaces
• Power-sensitive embedded system designs
• Consumer electronics requiring low-voltage oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before ordering. Confirm that the 1.8V supply voltage aligns with your system's power architecture. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet. Check for any specific handling instructions regarding electrostatic discharge during installation.

Oscillators Selection Notes

Select this component when a precise 21.165824 MHz timing source is required for LVCMOS-compatible circuits. The choice is driven by the need for low-power operation via the standby feature and the constraint of a 1.8V supply voltage. Consider the physical size constraints imposed by the 4-SMD package. Evaluate if the standard frequency stability meets the jitter and phase noise requirements of the target application.

Oscillators Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized low-profile package. The 'PD' suffix indicates the presence of a power-down capability. This model specifically targets applications needing a stable clock signal at approximately 21.17 MHz with minimal power consumption.

Oscillators Replacement Considerations

Direct replacements must match the 21.165824 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as current consumption and startup time. Cross-reference with other manufacturers offering similar XO specifications.