18QHTF21-13.5635-PD

Overview

The 18QHTF21-13.5635-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.5635 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby power-down mode. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is suitable for systems requiring precise timing signals within a small form factor.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby power-down functionality to reduce consumption
• Utilizes a compact 4-SMD no-lead surface-mount package

Applications

• Portable electronic devices requiring low power consumption
• Communication equipment utilizing 13.56 MHz frequencies
• Embedded systems needing precise clock synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when a 13.5635 MHz clock signal is specifically required. Consider the 1.8V operating voltage and LVCMOS output levels for compatibility with downstream logic. The small 2.0x1.6mm package is ideal for space-constrained designs. Evaluate the need for the standby feature if power management is critical to the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized 4-SMD no-lead package. The series supports both 1.8V and other voltage options, with LVCMOS outputs being common across the range. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from standard continuous-operation variants within the same family.

Replacement Considerations

Direct replacements must match the 13.5635 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify that substitute parts offer similar electrical characteristics and thermal performance. Cross-reference with Mercury Electronics' official substitution lists or equivalent industry components ensuring identical pinout and functional specifications.