18QHTF21-1.290-PD

Overview

The 18QHTF21-1.290-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.29 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby power-down capability
• Provides LVCMOS output signal

Applications

• Low-frequency clock generation
• Portable electronic devices
• Battery-powered systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 1.29 MHz reference is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. The small form factor makes it suitable for space-constrained designs where minimal board area is critical for the timing reference source.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal oscillators. The series offers various frequencies and voltage options, catering to diverse timing needs. Mercury Electronics has a long history in the crystal industry, providing reliable frequency control solutions for global electronics markets.

Replacement Considerations

Check for direct substitutes within the same series offering identical pinouts and electrical characteristics. Verify that any alternative maintains the 1.8V operating voltage and LVCMOS output type to ensure functional equivalence without redesigning the surrounding circuitry.