18QHTF21-21.504-PD

Oscillators Overview

The 18QHTF21-21.504-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.504 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a power-down capability, allowing for standby mode operation to reduce energy consumption when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm, suitable for surface-mount assembly in space-constrained electronic designs.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down functionality for standby mode operation
• Utilizes a compact 4-SMD no-lead surface mount package

Oscillators Applications

• Digital signal processing circuits requiring precise clock timing
• Communication systems utilizing standard frequency references
• Embedded systems with low-voltage power constraints

Oscillators Procurement Notes

Verify the specific ordering suffix and frequency tolerance requirements against the official datasheet before procurement. Ensure that the 1.8V supply voltage aligns with the target system design. Confirm the package footprint matches the PCB layout specifications. Check for RoHS compliance status if environmental regulations apply to the final product assembly.

Oscillators Selection Notes

Select this component when a stable 21.504 MHz reference is required for LVCMOS-compatible digital logic. The choice is driven by the need for a low-profile surface-mount solution with integrated power management capabilities. Consider the operating temperature range and load capacitance requirements relative to the specific application environment to ensure long-term reliability and frequency stability.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of standard crystal oscillators. The series is characterized by small form factors and low voltage operation, targeting modern portable and high-density electronics. Mercury Electronics has extensive experience in quartz crystal manufacturing, positioning this component within a lineage of established frequency control products designed for industrial and commercial applications.

Oscillators Replacement Considerations

Direct substitutes must match the 21.504 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as drive level and load capacitance. Cross-reference with other manufacturers offering equivalent SMD oscillators to ensure functional interchangeability without redesigning the host circuit.