18QHTF21-49.4367-PD

Overview

The 18QHTF21-49.4367-PD is a standard LVCMOS crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4367 MHz with a 4-pin SMD no-lead package. The device supports a supply voltage range typically associated with the 1.8V series, featuring standby power-down functionality. It is designed for surface-mount applications requiring precise timing signals in compact electronic systems.

Feature Summary

• Generates a stable 49.4367 MHz clock signal using LVCMOS output levels
• Integrates standby mode capability for power management efficiency
• Utilizes a compact 4-pin surface-mount no-lead package design

Applications

• Digital signal processing circuits requiring precise clock synchronization
• Communication equipment utilizing standard CMOS logic interfaces
• Embedded systems needing low-power standby operation modes

Procurement Notes

Verify the specific operating voltage and load capacitance requirements against your circuit design before ordering. Confirm that the 4-pin SMD footprint matches your PCB layout constraints. Ensure compatibility with LVCMOS input thresholds of the receiving logic components to guarantee reliable signal integrity during operation.

Selection Notes

Select this component when a fixed frequency of 49.4367 MHz is required with low-profile surface-mount packaging. Consider the standby feature if power conservation is critical. Compare against other Mercury oscillators in the 18QHTF series for alternative frequencies or voltage options suitable for your specific application environment.

Part Context

Mercury Electronic Industrial Co., Ltd. is a Taiwan-based manufacturer specializing in frequency control products since 1973. Their portfolio includes quartz crystals, oscillators, TCXOs, and VCTCXOs. This model belongs to their active oscillator line, providing standardized timing solutions for modern electronics.

Replacement Considerations

Check for direct substitutes within the 18QHTF21 series from Mercury Electronics offering different frequencies but identical pinouts and electrical characteristics. Verify cross-manufacturer equivalents that match the 49.4367 MHz frequency, LVCMOS output type, and 4-SMD no-lead package dimensions.