18QHTF21-75.019-PD

Overview

The 18QHTF21-75.019-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 75.019 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function accessible via a standby control pin. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS compatibility
• Includes a dedicated standby mode for power management
• Utilizes a small-footprint surface-mount package

Applications

• High-density digital signal processing circuits
• Portable electronic devices requiring low power consumption
• Communication modules needing precise clock synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the PCB layout accommodates the 2.0x1.6mm footprint and no-lead package type to ensure reliable soldering and thermal performance during assembly.

Selection Notes

Select this component when a precise 75.019 MHz reference is required in space-constrained applications. The choice is driven by the need for low voltage operation and integrated power-down capabilities. Consider the LVCMOS interface compatibility with downstream logic gates. Evaluate the trade-off between the small package size and thermal dissipation needs for the specific enclosure environment.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in Taiwan producing crystals and oscillators. This series typically targets consumer electronics and industrial applications requiring stable clock signals in miniature packages.

Replacement Considerations

Direct replacements must match the 75.019 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify equivalent electrical parameters such as phase noise and jitter if available in official datasheets.