18QHTF21-49.4167-PD

Overview

The 18QHTF21-49.4167-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4167 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and supports a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications.

Feature Summary

• Supports low-power operation with a dedicated standby (power down) mode
• Features LVCMOS output logic for digital interface compatibility
• Designed as a standard XO (crystal oscillator) unit

Applications

• General-purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD No Lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 49.4167 MHz clock source is required with low-voltage operation. Consider the LVCMOS output compatibility with downstream digital logic. Evaluate the need for standby functionality to manage power consumption in battery-operated or idle states compared to continuous-operation oscillators.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within the same 1.8V LVCMOS SMD form factor. The series provides standardized timing solutions for consumer electronics and industrial equipment requiring compact, low-power clock generators.

Replacement Considerations

Direct substitutes must match the 49.4167 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package dimensions. Verify electrical parameters such as phase noise and jitter if critical for the specific application.