18QHTF21-122.760-PD

Overview

The 18QHTF21-122.760-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 122.76 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby or power-down capability for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications. The component supports an operating temperature range typical for commercial grade devices, ensuring reliable performance in various electronic systems requiring precise clock signals.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality to reduce power consumption
• Utilizes a 4-SMD no-lead surface mount package for space efficiency

Applications

• Digital signal processing systems requiring precise timing
• Communication equipment utilizing standard clock frequencies
• Embedded systems with low-voltage logic requirements

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet. Check for any specific handling instructions related to the surface-mount technology used in this component.

Selection Notes

Select this model when a 122.76 MHz clock source is required with LVCMOS outputs. Consider the 1.8V operating voltage constraint for compatibility with modern low-power logic families. Evaluate the need for standby capabilities if power management is a priority. Compare the physical size of the 4-SMD package against available board space. Verify thermal performance within the expected operating environment.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, designed for general-purpose clocking applications. The series offers various frequency options within a standardized small form factor. Mercury Electronics has established itself as a manufacturer of frequency control products since 1973, focusing on quartz-based solutions. This specific part represents a standard XO configuration optimized for integration into compact electronic assemblies.

Replacement Considerations

Direct substitutes must match the 122.76 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as rise/fall times and duty cycle. Cross-reference with other manufacturers offering similar surface-mount oscillators to ensure functional equivalence in the target application.