18QHTF21-13.7125-PD

Overview

The 18QHTF21-13.7125-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind., Co., Ltd. It operates at a fixed frequency of 13.7125 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) control function to reduce consumption when inactive. 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 standby mode for power management
• Compact surface-mount form factor

Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded microcontroller clocks

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to guarantee proper soldering and electrical connection.

Selection Notes

Select this component when a precise 13.7125 MHz clock source is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage and the availability of a power-down pin if energy efficiency is a priority. The small 2.0x1.6mm package makes it suitable for space-constrained designs where standard through-hole or larger SMD oscillators cannot fit.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 1.8V LVCMOS format. The series is characterized by its small footprint and integrated power-down functionality, catering to modern portable and high-density electronic applications requiring reliable timing signals.

Replacement Considerations

Direct substitutes must match the 13.7125 MHz frequency, 1.8V LVCMOS output, and 4-SMD No Lead package. Verify pin compatibility and thermal characteristics. Cross-reference with other manufacturers offering identical specifications to ensure functional equivalence without redesigning the host circuit.