18QHTF21-1.900-PD

Overview

The 18QHTF21-1.900-PD is a 1.9 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates with a 1.8V supply voltage. The device features a power-down function for standby mode control. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component is designed to provide stable clock signals for electronic circuits requiring low-voltage operation.

Feature Summary

• LVCMOS output logic interface
• Integrated power-down capability
• Compact surface-mount package

Applications

• Battery-powered portable devices
• Low-voltage digital systems
• Clock signal generation

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct voltage and package configuration. Confirm that the LVCMOS output type matches system requirements. Check for availability of official datasheets to validate frequency stability and operating temperature ranges before integration into designs.

Selection Notes

Select this component when a 1.9 MHz clock source is required with minimal footprint constraints. Ensure the design supports 1.8V logic levels and can accommodate the power-down control signal. Consider thermal management within the small SMD package limits during high-duty cycle operations.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series offers various frequencies and voltage options, typically featuring low power consumption and small form factors suitable for modern consumer electronics and communication modules.

Replacement Considerations

Direct substitutes include other 1.9 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as current consumption and startup time before substitution.