18QHTF21-1.900-OE

Overview

The 18QHTF21-1.900-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.9 MHz and utilizes an LVCMOS output signal type. The component requires a supply voltage of 1.8V and includes Enable/Disable functionality for power management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.

Feature Summary

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

Applications

• General timing circuits
• Embedded systems clock sources
• Consumer electronics devices

Procurement Notes

Verify the specific frequency suffix matches the required 1.9 MHz specification, as the 18QHTF21 series offers various frequencies. Confirm the 1.8V supply requirement aligns with the target system design. Ensure the 4-SMD package footprint is compatible with the PCB layout. Check official datasheets for stability and temperature range specifications before integration.

Selection Notes

Select this model when a low-frequency 1.9 MHz clock source is required with LVCMOS compatibility. The 1.8V operating voltage suits low-power designs. The enable/disable feature allows for dynamic power saving. Consider the 4-SMD package size for space-constrained layouts compared to larger through-hole alternatives.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series provides various frequency options within a small SMD form factor. These components are designed for general-purpose timing applications requiring stable clock signals with minimal board space consumption.

Replacement Considerations

Direct substitutes include other 1.9 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson or NDK. Verify pinout compatibility and electrical parameters such as supply voltage and load capacitance before substitution.