18QHTF21-49.5933-PD

Overview

The 18QHTF21-49.5933-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 49.5933 MHz and utilizes an LVCMOS output interface. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports Low Voltage Complementary Metal-Oxide Semiconductor (LVCMOS) output signaling
• Includes a dedicated Standby or Power Down pin for energy management
• Utilizes a surface-mount 4-pin no-lead package design

Applications

• Digital signal processing circuits requiring precise clock timing
• Communication equipment utilizing LVCMOS interfaces
• Portable electronic devices necessitating low power consumption modes

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 2.0x1.6 mm 4-SMD no-lead package specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a stable 49.5933 MHz clock source is required for LVCMOS-compatible logic families. The inclusion of a power-down feature makes it suitable for battery-operated systems where standby current reduction is critical. Compare performance metrics such as phase noise and jitter against application needs to ensure signal integrity is maintained within acceptable limits.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized small outline package. The 'PD' suffix indicates the presence of a power-down control capability, distinguishing it from continuous-operation variants within the same form factor family.

Replacement Considerations

Direct replacements must match the 49.5933 MHz frequency, 1.8V operating voltage, LVCMOS output type, and 4-SMD 2.0x1.6mm package. Verify that substitute components support the same power-down functionality and meet equivalent electrical specifications for frequency stability and load drive.