18QHTF21-13.558-PD

Overview

The 18QHTF21-13.558-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.558 MHz with an LVCMOS output logic type. The device requires a 1.8V supply voltage and features a power-down function for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy management
• Utilizes LVCMOS output interface

Applications

• General electronic circuits requiring precise timing
• Embedded systems utilizing standard clock signals
• Portable devices necessitating low-power consumption

Procurement Notes

Verify the specific suffix PD indicates power-down functionality rather than other variants like OE. Confirm the 1.8V supply requirement matches system design constraints. Ensure the 2.0x1.6mm footprint aligns with PCB layout specifications. Check datasheet for operating temperature range limits before integration.

Selection Notes

Select this component when a 13.558 MHz clock signal is required with minimal power usage. The LVCMOS output ensures compatibility with standard digital logic families. The small form factor suits space-constrained designs. Verify that the 1.8V rail is stable to maintain frequency accuracy.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0x1.6mm package. The PD suffix distinguishes it from versions with different enable controls or voltage levels.

Replacement Considerations

Direct substitutes include other 13.558 MHz XO components with identical 1.8V LVCMOS specifications and 4-SMD no-lead packaging. Verify pinout compatibility and thermal characteristics before swapping.