18QHTF21-8.640-PD

Overview

The 18QHTF21-8.640-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 8.64 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with physical dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby or power-down functionality to reduce power consumption
• Utilizes a small form factor 4-SMD no lead package design

Applications

• General purpose clock signal generation in electronic circuits
• Timing reference sources for low-voltage digital systems
• Embedded devices requiring compact oscillator solutions

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure the correct voltage and enable/disable configuration. Confirm that the 1.8V supply requirement aligns with the target system design. Check for any specific environmental ratings or tolerance specifications listed in the datasheet before finalizing procurement decisions.

Selection Notes

Select this component when a precise 8.64 MHz timing source is required for 1.8V logic families. Consider the 2.0x1.6mm footprint constraints during PCB layout. Ensure the application benefits from the standby feature if power efficiency is a priority. Validate that the LVCMOS output swing matches the input requirements of the receiving circuitry.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltages, typically utilizing SMD packages. This specific model represents a standard XO variant optimized for low-voltage applications with integrated power management capabilities.

Replacement Considerations

Direct substitutes within the same series include parts like 18QHTF21-8.000-PD or 18QHTF21-51.200-PD, provided the frequency difference is acceptable for the application. Cross-referencing pinouts and electrical characteristics with the original datasheet is essential before substitution.