18QHTF21-4.000-PD

Oscillators Overview

The 18QHTF21-4.000-PD is a 4 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Oscillators Feature Summary

• LVCMOS output interface
• Integrated standby mode
• Low-voltage operation

Oscillators Applications

• Portable electronic devices
• Communication equipment
• Embedded systems

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a low-profile, low-voltage oscillator is required for space-constrained designs. The LVCMOS output is suitable for standard digital logic interfaces. Consider the standby feature if power efficiency is critical. Verify compatibility with the host system's clock input requirements and ensure the operating temperature range meets the application environment standards.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a standardized 2.0x1.6 mm package. It is designed for applications requiring precise timing signals in compact form factors, serving as a clock source for microcontrollers and memory devices.

Oscillators Replacement Considerations

Direct substitutes include other 4 MHz LVCMOS oscillators in a 2.0x1.6 mm SMD package with 1.8V operation. Verify pinout compatibility and electrical parameters such as phase jitter and duty cycle. Cross-reference with Mercury Electronics' updated product lists for potential newer revisions or equivalent alternatives from other manufacturers.