18QHTF21-8.700-PD

Overview

The 18QHTF21-8.700-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 8.7 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a Standby mode, also referred to as Power Down functionality, allowing for energy conservation when the oscillator is not in active use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes Standby (Power Down) functionality for power management
• Operates on a 1.8V supply voltage

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded systems requiring low-power oscillators

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD No Lead package footprint matches your PCB layout constraints. Check for any specific RoHS or environmental compliance certifications required by your manufacturing standards.

Selection Notes

Select this component when a precise 8.7 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage if your system utilizes low-voltage logic families. The integrated standby feature makes it suitable for battery-operated devices where power efficiency is critical. Evaluate the physical size constraints to ensure the 2.0x1.6mm package fits within the designated area.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series typically offers various frequencies and voltage options. Mercury Electronic has been a manufacturer of frequency control products since 1973, establishing itself as a pioneer in Taiwan's crystal industry. This specific model represents a standard XO variant within their portfolio.

Replacement Considerations

Direct substitutes may include other 8.7 MHz LVCMOS oscillators in similar SMD packages from different manufacturers, provided they match the 1.8V supply and pinout configuration. Cross-reference with Mercury's own datasheet for alternative part numbers with different frequencies or voltages within the same series.