18QHTF21-12.2888-PD

Overview

The 18QHTF21-12.2888-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.2888 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. This component is designed for applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• Provides stable 12.2888 MHz clock signal generation using LVCMOS output interface
• Integrates standby and power-down functionality to reduce power consumption during idle states
• Utilizes a low-profile 4-SMD no-lead surface-mount package for efficient PCB layout

Applications

• Digital signal processing circuits requiring precise timing references
• Communication modules utilizing LVCMOS-compatible interfaces
• Portable electronic devices where low voltage operation and small form factor are critical

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply voltage aligns with your power rail specifications. Ensure the 4-SMD no-lead package footprint matches your PCB silkscreen and solder mask definitions. Check for any RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this oscillator when a fixed 12.2888 MHz frequency is necessary for data transmission or processing synchronization. Consider the LVCMOS output level compatibility with downstream logic gates. Evaluate the thermal performance and operating temperature range relative to your environmental conditions. The integrated power-down feature makes it suitable for battery-operated applications requiring extended standby times.

Part Context

This component belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized 2.0x1.6mm footprint. These oscillators are engineered for high stability and reliability in consumer electronics and industrial control systems. The 'PD' suffix indicates the inclusion of power-down capability, distinguishing it from continuous-operation variants.

Replacement Considerations

Direct replacements must match the 12.2888 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter. Cross-reference with other manufacturers offering similar low-profile XO components. Ensure the substitute part supports the same standby function if power management is a design constraint.