18QHTF21-13.5531-OE

Overview

The 18QHTF21-13.5531-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.5531 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, supporting a supply voltage of 1.8V. A key functional feature is the inclusion of an Enable/Disable control pin, allowing for power management flexibility in embedded systems. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Supports LVCMOS output interface for digital compatibility
• Features integrated Enable/Disable control functionality
• Operates on a single 1.8V power supply rail

Applications

• Embedded system clock generation
• Digital signal processing timing references
• Communication module synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power architecture. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Cross-reference the manufacturer datasheet for thermal and environmental specifications to guarantee reliability under operating conditions.

Selection Notes

Select this component when a precise 13.5531 MHz reference is required for LVCMOS-compatible digital circuits. The choice is driven by the need for low-power operation at 1.8V and the requirement for active enable/disable capabilities. The small 2.0x1.6mm form factor makes it appropriate for high-density board layouts where space is limited compared to larger oscillator packages.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd., which specializes in quartz-based timing solutions. The series typically includes various frequencies and voltage options within the same physical footprint family. This specific model represents a standard XO variant optimized for consumer and industrial electronics requiring stable clock signals without the complexity of temperature compensation.

Replacement Considerations

Direct substitutes must match the 13.5531 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if critical. Alternative models from other manufacturers require careful validation of the enable/disable logic polarity and drive strength.