18QHTF21-1.485-OE

Overview

The 18QHTF21-1.485-OE is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, designed for surface-mount applications. It operates at a nominal frequency of 1.485 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and includes an enable/disable function for power management. Key electrical specifications include a maximum supply current of 21mA and a frequency stability of ±50ppm. The component is rated for an operating temperature range of -40°C to +85°C and utilizes a compact 4-SMD package configuration.

Feature Summary

• LVCMOS output interface compatible with standard digital logic circuits
• Integrated enable and disable control functionality for active power management
• Surface-mount construction suitable for automated PCB assembly processes

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference sources for microcontroller units
• Data communication interfaces requiring stable frequency references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the surface-mount footprint matches the designated PCB land pattern. Check for RoHS compliance status if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside precise timing stability. The ±50ppm frequency stability makes it suitable for applications sensitive to clock drift over temperature variations. Consider the enable/disable feature if dynamic power saving is necessary during idle periods. Evaluate the 4-SMD package size constraints relative to available board space.

Part Context

This oscillator belongs to the QHTF series from Mercury Electronic Industrial Co., Ltd, a manufacturer specializing in quartz crystals and frequency control products. The series represents a transition from lead-type packages to modern surface-mount technologies. Mercury Electronics has extensive experience in Taiwan's quartz manufacturing sector, providing expanded frequency ranges across their oscillator portfolio.

Replacement Considerations

Direct substitutes within the same series include models such as 18QHTF21-1.0448-OE and 18QHTF21-6.300-OE, which share identical package dimensions and electrical characteristics but operate at different frequencies. When replacing, ensure the new part maintains the 1.8V supply requirement and LVCMOS output compatibility.