18QHTF21-9.984-PD

Overview

The 18QHTF21-9.984-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 9.984 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Features LVCMOS output logic for digital interfacing
• Includes standby mode for power management

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system clock sources

Procurement Notes

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

Selection Notes

Select this component when a precise 9.984 MHz clock source is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the 1.8V operating voltage and standby feature for systems requiring active power management. The small 2.0x1.6 mm package is suitable for space-constrained designs.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and supports LVCMOS outputs. The 'PD' suffix indicates the inclusion of a power-down function. These components are designed for general-purpose timing applications requiring stable frequency generation in compact form factors.

Replacement Considerations

Direct substitutes include other 9.984 MHz LVCMOS oscillators in a 4-SMD no-lead package with 1.8V operation. Verify pinout compatibility and electrical parameters such as phase noise and jitter before substitution.