18QHTF21-1.400-OE

Overview

The 18QHTF21-1.400-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fundamental frequency of 1.4 MHz and utilizes an LVCMOS output interface. The device is designed for low-power applications, featuring a supply voltage range of 1.8V with enable/disable functionality. It is housed in a compact 4-SMD, no-lead package suitable for surface-mount assembly.

Feature Summary

• LVCMOS output interface
• Enable/Disable control function
• Compact 4-SMD no-lead package

Applications

• General digital timing circuits
• Embedded system clock sources
• Low-frequency signal generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm the 4-SMD footprint matches your PCB layout constraints to avoid assembly issues.

Selection Notes

Select this component when a precise 1.4 MHz reference is required for LVCMOS-compatible logic families. Consider the enable/disable feature if power management during idle states is critical. Evaluate the thermal performance and stability needs relative to the ±50ppm typical stability found in similar Mercury XO series devices.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies ranging from sub-MHz to high-speed ranges, all sharing a common low-profile package and LVCMOS output structure for easy integration into modern electronic designs.

Replacement Considerations

Direct substitutes include other 1.4 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson, NDK, or SiTime, provided pin compatibility and electrical specifications match.