18QHTF21-87.900-PD

Overview

The 18QHTF21-87.900-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 87.9 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to reduce consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with integrated standby mode
• Provides stable LVCMOS clock signal generation
• Utilizes leadless surface-mount packaging for space efficiency

Applications

• Digital signal processing systems
• Communication equipment timing circuits
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to guarantee proper soldering and electrical connection.

Selection Notes

Select this component when a precise 87.9 MHz reference is required for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage constraint and the availability of the standby feature for power management strategies. Evaluate the thermal performance and size constraints of the 4-SMD package relative to the target application environment.

Part Context

This part belongs to the QHTF series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The '18' prefix indicates the 1.8V supply variant, while '21' typically denotes the package style. This specific model provides a fixed 87.9 MHz output, distinguishing it from programmable or adjustable oscillator families.

Replacement Considerations

Direct substitutes must match the 87.9 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pin compatibility and thermal characteristics. Cross-reference with other Mercury Electronics models in the same series or equivalent offerings from other manufacturers ensuring identical electrical parameters.