18QHTF21-49.460-PD

Overview

The 18QHTF21-49.460-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.46 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage range that includes 1.8V operation, featuring a power-down standby mode for energy efficiency. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm. This component is designed for precise timing applications requiring low profile and reliable performance.

Feature Summary

• Supports LVCMOS output signal compatibility
• Features integrated power-down standby functionality
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital clock generation circuits
• Data communication interface timing
• Microcontroller system clocks

Procurement Notes

Verify the specific operating voltage requirements against the target circuit design to ensure compatibility with the 1.8V specification. Confirm that the PCB footprint matches the 2.0x1.6 mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided in the official datasheet to maintain component integrity during assembly processes.

Selection Notes

Select this component when a small form factor is required alongside stable frequency generation. The inclusion of a power-down pin allows for system-level power management strategies. Ensure the load capacitance requirements of the host system align with the oscillator's internal specifications to maintain accurate frequency stability across the operational temperature range.

Part Context

This part belongs to the HFT series of surface-mount crystal oscillators from Mercury Electronics. The series is characterized by its small footprint and low power consumption options. It serves as a direct replacement for larger through-hole crystals where space constraints exist. The manufacturer specializes in frequency control solutions including quartz crystals and filters.

Replacement Considerations

Direct substitutes must match the 49.46 MHz frequency, LVCMOS output type, and 2.0x1.6 mm package size. Verify electrical parameters such as supply voltage and current consumption before substitution.