18QHTF21-4.200-PD

Oscillators Overview

The 18QHTF21-4.200-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 4.2 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.

Oscillators Feature Summary

• LVCMOS output logic interface
• Integrated standby power-down capability
• Compact 4-SMD no-lead surface-mount packaging

Oscillators Applications

• General-purpose clock signal generation
• Low-power embedded systems
• Digital circuit timing references

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD package dimensions fit within the designated PCB footprint constraints.

Oscillators Selection Notes

Select this component when a precise 4.2 MHz reference is required with low standby current consumption. The LVCMOS output is compatible with standard digital logic families operating at 1.8V. Consider the physical size of the 4-SMD package for high-density board layouts.

Oscillators Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized small form factor. The 'PD' suffix indicates the inclusion of a power-down control feature for energy management.

Oscillators Replacement Considerations

Direct substitutes include other 4.2 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pin compatibility and electrical specifications such as current draw and startup time before swapping.