18QHTF21-12.552-PD

Overview

The 18QHTF21-12.552-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.552 MHz and utilizes LVCMOS output logic levels. The device is designed for surface mount applications, featuring a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. It supports a supply voltage of 1.8V and includes a standby function for power down capabilities.

Feature Summary

• LVCMOS output interface
• Standby power down functionality
• Compact 4-SMD no lead package

Applications

• General purpose clock generation
• Embedded system timing
• Consumer electronics

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Request official datasheets from Mercury Electronics for precise electrical characteristics and reliability data.

Selection Notes

Select this component when a low-profile, 1.8V LVCMOS oscillator is required for space-constrained designs. The 12.552 MHz frequency suits specific serial communication or timing standards. Consider the standby feature if power management is critical. Verify compatibility with existing clock distribution networks and ensure the package size fits within the designated area on the printed circuit board.

Part Context

This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series offers various frequencies in a standardized 2.0x1.6 mm footprint. The 'PD' suffix indicates the inclusion of a power down control pin. These components are designed for high-volume manufacturing and reliable performance in consumer and industrial electronic devices requiring precise timing signals.

Replacement Considerations

Direct substitutes must match the 12.552 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Check equivalent models from other manufacturers ensuring identical pinout and electrical specifications. Verify that any replacement maintains the same standby functionality and operating temperature range to ensure seamless integration without redesigning the host circuit.