18QHTF21-69.948-PD

Overview

The 18QHTF21-69.948-PD is a quartz crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 69.948 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic for digital interface compatibility
• Includes Standby (Power Down) functionality to reduce power consumption during idle periods
• Utilizes a small form factor 4-SMD, No Lead package for space-constrained designs

Applications

• Battery-powered portable devices
• Communication equipment requiring stable clock signals
• Embedded systems with low voltage requirements

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 circuit's power rails. Ensure the 4-SMD, No Lead package dimensions fit within your PCB footprint constraints. Check for any specific RoHS or environmental compliance certifications required by your project standards.

Selection Notes

Select this component when a 69.948 MHz clock signal is required with low voltage operation. Consider the LVCMOS output for direct interfacing with standard digital logic. The standby feature makes it suitable for applications where power efficiency is critical. Evaluate the 4-SMD package size against available board space compared to larger oscillator packages.

Part Context

This part belongs to the QHTF series of oscillators from Mercury Electronics, designed for general-purpose timing applications. The '18' prefix typically indicates the 1.8V supply voltage variant, while 'PD' denotes the inclusion of a power-down pin. This series is commonly used in consumer electronics and industrial control systems where reliable frequency generation is essential.

Replacement Considerations

Direct substitutes may include other 69.948 MHz LVCMOS oscillators with 1.8V supply and 4-SMD no-lead packages. Verify pinout compatibility and electrical specifications such as phase noise and jitter before substitution. Consult manufacturer cross-reference lists for equivalent parts from other suppliers.