18QHTF21-84.4032-PD

Overview

The 18QHTF21-84.4032-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 84.4032 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage and features a standby power-down function for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is designed for precise timing applications requiring low power consumption and small form factor integration.

Feature Summary

• Supports standby power-down mode to reduce current consumption during idle periods
• Utilizes LVCMOS output logic for direct interface compatibility with digital circuits
• Encapsulated in a leadless 4-SMD surface-mount package for automated assembly

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing specific baud rate frequencies
• Portable electronic devices where power efficiency and size are critical constraints

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against the system design specifications before procurement. Ensure that the 1.8V supply rail can maintain stable voltage under all operating conditions to prevent frequency drift. Confirm that the PCB layout supports the 4-SMD no-lead footprint dimensions accurately to ensure proper solder joint formation and mechanical stability during thermal cycling.

Selection Notes

Select this component when a specific 84.4032 MHz frequency is required alongside low-voltage operation. Consider the standby feature if power management is a priority in the application. Evaluate the 2.0x1.6 mm package size against available board space. Compare performance metrics such as phase noise and stability against other oscillators in the same family if stricter timing precision is needed for the target application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequency options within a standardized 1.8V LVCMOS format. The series is characterized by its compact leadless SMD packaging and inclusion of power-down capabilities. Other variants in this line differ primarily in their nominal output frequencies while maintaining consistent electrical interfaces and physical dimensions for design flexibility.

Replacement Considerations

Direct replacements must match the 84.4032 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile oscillators only if electrical parameters align precisely with the original specification.