18QHTF21-74.9291-OE

Overview

The 18QHTF21-74.9291-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 74.9291 MHz and utilizes LVCMOS output logic levels. The device requires a supply voltage of 1.8V and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Provides stable clock signals at 74.9291 MHz using LVCMOS output interface
• Supports low-voltage operation with 1.8V supply requirement
• Includes hardware enable/disable functionality for power optimization
• Utilizes small form-factor surface-mount packaging

Applications

• High-speed digital signal processing systems
• Communication equipment requiring precise timing references
• Embedded computing platforms needing low-power clock sources
• Test and measurement instrumentation

Procurement Notes

Verify the specific suffix (OE) matches your design requirements, as it may indicate specific testing or quality standards compared to other variants like PD. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint fits your PCB layout constraints. Check datasheet specifications for operating temperature range and load capacitance requirements before finalizing procurement.

Selection Notes

Select this component when a precise 74.9291 MHz clock source is required with low power consumption. The LVCMOS output ensures compatibility with standard digital logic families. Consider the enable/disable feature if dynamic power management is necessary. The small 2.0x1.6mm package is suitable for space-constrained designs. Verify that the 1.8V operating voltage matches your system architecture to avoid level shifting issues.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series includes various frequencies and package types, such as the 18QHTF21-65.300-OE and 18QHTF21-124.913-OE. Mercury Electronics has been a pioneer in the Taiwan crystal industry since 1973, offering components like TCXOs and VCTCXOs alongside standard oscillators.

Replacement Considerations

Direct substitutes include other 74.9291 MHz LVCMOS oscillators in similar packages. Variants within the same series, such as different suffixes, may offer identical electrical performance but differ in testing or packaging details. Always verify pinout compatibility and thermal characteristics when replacing.