18QHTF21-7.650-PD

Overview

The 18QHTF21-7.650-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 7.65 MHz and utilizes an LVCMOS output signal format. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, specifically identified as a 4-VDFN with dimensions of 3.2x2.5 mm. This component is designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power reduction
• Compact 4-pin surface-mount footprint

Applications

• Digital signal processing circuits
• Microcontroller clock sources
• Communication equipment timing

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply voltage aligns with the host circuit's power rails. Ensure the PCB layout accommodates the 4-VDFN (3.2x2.5 mm) package dimensions to prevent mechanical interference. Cross-reference the datasheet for any specific reflow soldering profile recommendations to maintain component integrity during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS output. The 7.65 MHz frequency is suitable for specific baud rate generation or sub-clock applications. Consider the small 4-SMD package size if board space is limited. Verify that the standby feature meets the power consumption constraints of the application. Ensure the manufacturer's reliability standards meet the environmental requirements of the end product.

Part Context

This part belongs to the 18QHTF21 series of oscillators from Mercury Electronics Ind. Co. Ltd. The series offers various frequency options within a standardized 4-SMD package. The 'PD' suffix typically indicates the inclusion of a power-down pin or functionality. Mercury Electronics specializes in frequency control products, providing stable timing solutions for electronic systems. This specific model represents a standard XO variant optimized for low-voltage digital interfaces.

Replacement Considerations

Compatible substitutes include other 1.8V LVCMOS oscillators in a 4-SMD No Lead package with similar frequency specifications. Ensure the replacement maintains the same footprint and pinout configuration. Verify that alternative parts support the standby function if power management is critical. Check for equivalent stability and phase noise characteristics to ensure system performance is not compromised.