18QHTF21-8.250-PD

Overview

The 18QHTF21-8.250-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 8.25 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a power-down function, allowing for standby mode operation to reduce power consumption when not in use. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down functionality for energy-efficient standby operation
• Designed for low-voltage 1.8V supply systems

Applications

• General-purpose clock signal generation in electronic circuits
• Low-power embedded system timing references
• Digital communication interfaces requiring precise frequency standards

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 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Selection Notes

Select this component when a stable 8.25 MHz reference is required for LVCMOS-compatible digital logic. Consider the power-down feature if battery life or thermal management is critical. Ensure the 1.8V supply voltage is available and stable within your design. Evaluate the small form factor of the 4-SMD package against available board space. Verify that the standard XO performance meets your jitter and stability specifications.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options. Mercury Electronics is a specialized manufacturer of frequency control products, including crystals and oscillators, with a long history in the industry. This specific model represents a standard XO variant optimized for low-voltage applications.

Replacement Considerations

Direct replacements must match the 8.25 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Other variants in the 18QHTF21 series may differ in frequency or voltage. Cross-reference with other manufacturers' 4-pin SMD oscillators only if electrical parameters are identical. Verify pinout compatibility before substitution.