18QHTF21-49.420-PD

Overview

The 18QHTF21-49.420-PD is a 49.42 MHz standard LVCMOS oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a supply voltage of 1.8V and features a 4-SMD, no-lead package. The device includes a standby (power down) function for energy management. This component is designed for precise timing applications requiring low current consumption and compact surface-mount integration.

Feature Summary

• Generates a stable 49.42 MHz clock signal using LVCMOS output logic
• Operates on a single 1.8V power supply rail
• Housed in a compact 4-SMD no-lead surface-mount package
• Supports standby mode to reduce power consumption during idle periods

Applications

• Embedded systems requiring precise clock synchronization
• Portable electronic devices with strict power constraints
• Communication modules utilizing LVCMOS interfaces
• Industrial control boards needing compact timing solutions

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official datasheet to prevent assembly errors.

Selection Notes

Select this model when a low-voltage 1.8V operation is mandatory for the target application. The choice is driven by the need for a small form factor via the SMD package and the requirement for a power-down feature to extend battery life. Ensure the host circuit supports LVCMOS signal levels for proper interface compatibility.

Part Context

This part belongs to the Mercury Electronics family of quartz crystal oscillators. It complements other models like the 18QHTF21 series variants, offering standardized timing solutions. The manufacturer specializes in frequency-control components including crystals, filters, and TCXOs, providing a range of options for diverse timing needs.

Replacement Considerations

Direct substitutes within the same series include the 18QHTF21-49.000-PD, 18QHTF21-51.200-PD, and 18QHTF21-8.000-PD, provided the specific frequency difference is acceptable for the application. Verify pinout and electrical characteristics match before swapping.