18QHTF21-49.350-PD

Overview

The 18QHTF21-49.350-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 49.35 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility.
• Features a dedicated standby mode to reduce power consumption during idle periods.
• Utilizes a surface-mount 4-SMD no-lead package for automated assembly.

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers requiring 49.35 MHz input
• Consumer electronics utilizing low-voltage digital interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Selection Notes

Select this component when a precise 49.35 MHz timing source is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the small 2.0x1.6mm package size if board space is limited. Ensure the system can support the 1.8V operating voltage and utilizes the standby feature effectively.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-profile crystal oscillators. The series typically offers various frequencies within a standardized 1.8V LVCMOS format. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from always-on variants in the same physical package family.

Replacement Considerations

Direct replacements must match the 49.35 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify that substitute parts also include the power-down functionality if required by the design. Cross-reference pinouts to ensure compatibility with existing PCB traces.