18QHTF21-42.336-PD

Oscillators Overview

The 18QHTF21-42.336-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 42.336 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a standby power-down function to reduce current consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm. The unit exhibits a frequency stability of 50 ppm and draws a maximum supply current of 23 mA.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient system integration
• Includes a standby mode allowing power-down functionality to minimize active current draw
• Delivers standard LVCMOS output signals suitable for digital logic interfacing
• Utilizes a small-footprint surface-mount package for space-constrained PCB layouts

Oscillators Applications

• Clock signal generation for embedded microcontrollers
• Timing reference for communication interface circuits
• Power management systems requiring low standby current
• Compact consumer electronic devices with limited board space

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable within the operational limits to maintain the specified 50 ppm frequency stability. Confirm that the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to avoid assembly issues. Check for any specific handling instructions related to the no-lead solder termination type.

Oscillators Selection Notes

Select this component when a precise 42.336 MHz clock source is required with minimal power consumption. The LVCMOS output is appropriate for standard digital logic families operating at 1.8V. Consider the 50 ppm stability if the application does not demand higher precision oscillators. The small form factor makes it suitable for dense circuit boards where larger packages are impractical.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in crystal manufacturing, positioning this part as a reliable timing solution. The series typically offers various frequencies and package options, with this specific model focusing on low-power applications through its standby capability.

Oscillators Replacement Considerations

Direct substitutes must match the 42.336 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6 mm package. Verify compatibility with existing PCB footprints and thermal requirements. Alternative parts should offer similar or better frequency stability and current consumption profiles to ensure seamless integration without redesign.