18QHTF21-1.250-OE

Overview

The 18QHTF21-1.250-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.25 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features an Enable/Disable control function. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount applications.

Feature Summary

• Supports LVCMOS output interface
• Includes enable/disable functionality
• Compact 4-SMD no lead package

Applications

• General purpose timing circuits
• Embedded systems requiring low-frequency clocks
• Consumer electronics with space constraints

Procurement Notes

Verify the specific frequency suffix matches the required 1.25 MHz operation. Confirm the 1.8V supply voltage compatibility with the target system design. Ensure the LVCMOS output level aligns with connected logic inputs. Check the Enable/Disable pin configuration against the schematic requirements before finalizing procurement.

Selection Notes

Select this component when a precise 1.25 MHz clock signal is needed with low power consumption. The 1.8V supply requirement dictates compatibility with modern low-voltage digital logic families. The small 4-SMD package is ideal for dense PCB layouts where space is limited compared to larger through-hole or standard SMD oscillators.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized small outline package. The series typically provides stable quartz-based timing solutions for consumer and industrial applications requiring reliable clock generation without the complexity of programmable devices.

Replacement Considerations

Direct substitutes may include other 1.25 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical specifications such as load capacitance and drive strength before substitution.