18QHTF21-13.504-PD

Overview

The 18QHTF21-13.504-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.504 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a power-down mode to reduce current consumption when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. It supports an operating temperature range from -40°C to 85°C and offers a frequency stability of ±50ppm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby or power-down functionality for energy efficiency
• Designed for surface mount assembly in small form factor applications

Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Data communication interfaces requiring precise clock signals

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 specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a low-profile, low-voltage oscillator is required for timing applications. Consider the ±50ppm stability specification against your system's jitter and phase noise requirements. Evaluate the 13.504 MHz frequency against available alternatives if standard frequencies like 13.56 MHz are acceptable. Assess the power-down feature benefits against your system's active and sleep cycle requirements.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically includes various frequencies and voltage options within the same physical package. The 'PD' suffix indicates the inclusion of a power-down control pin or function. This series is designed for consumer electronics and portable devices where space and power consumption are critical factors.

Replacement Considerations

Direct replacements must match the 13.504 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify that substitute parts offer equivalent ±50ppm stability and operate within the -40°C to 85°C temperature range. Ensure the replacement component supports the same power-down functionality if required by the design.