18QHTF21-1.8435-OE

Overview

The 18QHTF21-1.8435-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 1.8435 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications.

Feature Summary

• LVCMOS output interface
• 1.8V operating voltage
• Enable/Disable control functionality

Applications

• General purpose timing circuits
• Embedded systems requiring low voltage oscillators
• Consumer electronics with space constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator specifications. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint to prevent assembly issues during manufacturing.

Selection Notes

Select this component when a low-voltage 1.8V supply is available and LVCMOS compatibility is required. Consider the enable/disable feature if power management or clock gating is necessary for the application. Verify that the 1.8435 MHz frequency matches the system clock requirements precisely.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic, which offers various frequencies within the same package form factor. The series is characterized by its small footprint and low power consumption, targeting portable and battery-operated devices. Other variants in the series differ primarily in frequency and potentially voltage options.

Replacement Considerations

Direct replacements must match the 1.8V supply, LVCMOS output, and 4-SMD package. Check datasheets for compatible parts from other manufacturers offering identical pinouts and electrical characteristics. Ensure substitute components support the enable/disable control signal.