18QHTF21-8.000156-PD

Overview

The 18QHTF21-8.000156-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 8.000156 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability. It is housed in a compact 4-SMD, no lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

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

Applications

• General purpose clock signal generation
• Digital system timing reference
• Embedded controller clock input

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before procurement. 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 to prevent assembly issues. Cross-reference the datasheet for operating temperature ranges suitable for your environment.

Selection Notes

Select this component when a stable 8 MHz clock source is required for LVCMOS-compatible circuits. The choice depends on the need for low-power operation via the standby feature and the space constraints addressed by the small SMD package. Consider the manufacturer's history in quartz crystals for reliability. Evaluate if the standard XO performance meets your jitter and stability specifications compared to other oscillator types.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a pioneer in Taiwan's quartz crystal industry since 1973. The series typically offers various frequencies and voltages. This specific model represents a standard configuration within their portfolio, leveraging decades of manufacturing expertise in frequency control products.

Replacement Considerations

Check for direct substitutes like the 18QHTF21-8.000156-OE which shares similar specifications. Verify pinout and electrical parameters match exactly before swapping. Other variants in the series may differ in voltage or frequency.