18QHTF21-1.500-PD

Overview

The 18QHTF21-1.500-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.5 MHz and utilizes LVCMOS output logic levels. The device supports a 1.8V standby mode for power-down functionality, enabling energy efficiency when not in active use. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface for digital signal compatibility
• Integrated 1.8V standby mode for power management
• Standard crystal oscillator configuration
• Surface-mount 4-SMD no-lead package design

Applications

• General-purpose clock generation in embedded systems
• Low-power consumer electronics requiring standby modes
• Digital signal processing circuits with LVCMOS interfaces
• Compact portable devices utilizing surface-mount technology

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Cross-reference the datasheet for operating temperature ranges to guarantee reliability under intended environmental conditions.

Selection Notes

Select this component when a precise 1.5 MHz reference clock is required with low power consumption capabilities. The LVCMOS output ensures direct interfacing with compatible digital logic without additional level shifting. Consider the 1.8V standby feature if power conservation during idle periods is a critical design parameter. Evaluate the physical dimensions of the 4-SMD package against available board space.

Part Context

This part belongs to the QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within standardized packages. The 18QHTF21 variant specifically denotes the 1.8V operation class. The '-PD' suffix indicates the inclusion of power-down functionality, distinguishing it from continuous-operation variants within the same family.

Replacement Considerations

Direct substitutes must match the 1.5 MHz frequency, LVCMOS output type, and 1.8V supply voltage. Verify that alternative components support the 4-SMD no-lead package footprint. Check for equivalent standby power-down features if low-power operation is required. Ensure thermal and electrical characteristics are compatible with the original design specifications.