18QHTF21-12.0028-PD

Overview

The 18QHTF21-12.0028-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.0028 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes a power-down standby mode for energy efficiency
• Utilizes a small-footprint 4-SMD no-lead surface mount package

Applications

• General clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and operating temperature range requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Check for any specific handling instructions regarding ESD sensitivity during assembly.

Selection Notes

Select this component when a precise 12.0028 MHz timing source is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is critical. Evaluate thermal performance within the specified operating temperature range.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized 2.0x1.6 mm package. The series provides options for different supply voltages and output types. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants within the same physical form factor.

Replacement Considerations

Direct substitutes must match the 12.0028 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify equivalent electrical characteristics such as phase noise and jitter specifications. Ensure the replacement part supports the same power-down functionality if required by the system design.