18QHTF21-49.1522-PD

Overview

The 18QHTF21-49.1522-PD is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.1522 MHz and utilizes a 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The device supports a supply voltage range including 1.8V and features a Standby (Power Down) function for power management. It is designed for surface-mount applications requiring precise timing signals in compact electronic systems.

Feature Summary

• Generates stable 49.1522 MHz clock signals using LVCMOS output logic
• Incorporates a standby mode to reduce power consumption during idle periods
• Utilizes a compact 4-SMD no-lead package for efficient surface-mount integration

Applications

• Digital signal processing circuits requiring precise clock synchronization
• Communication modules utilizing standard LVCMOS interfaces
• Portable electronic devices where low profile and power efficiency are critical

Procurement Notes

Verify the specific operating voltage and load capacitance requirements against your circuit design before ordering. Confirm that the 4-SMD no-lead footprint matches your PCB layout constraints. Ensure compatibility with the intended LVCMOS input thresholds of the receiving component. Check for any specific tape and reel packaging requirements if automated assembly is planned.

Selection Notes

Select this component when a 49.1522 MHz frequency is required in a minimal footprint. Consider the 1.8V supply option if low voltage operation is necessary. Evaluate the standby feature benefits for battery-powered applications. Compare performance metrics against other mercury electronics oscillators if higher stability or different frequencies are needed.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The manufacturer has produced frequency control products since 1973. This series represents their surface-mount oscillator offerings, providing reliable timing solutions for modern electronic designs.

Replacement Considerations

Direct substitutes may include other 49.1522 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers like Epson, NDK, or TXC. Verify pinout compatibility and electrical specifications before swapping. Cross-reference with mercury electronics part numbers such as 18QHTF21 variants with different frequencies or voltages.