18QHTF21-59.9749-OE

Overview

The 18QHTF21-59.9749-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a nominal frequency of 59.9749 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features enable/disable control functionality. It is housed in a compact 4-SMD surface-mount package without lead. This component is designed for timing applications requiring precise frequency generation within the specified operational parameters.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Enable/Disable control pin for power management
• Surface-mount 4-SMD package design

Applications

• General purpose timing circuits
• Digital signal processing systems
• Communication equipment clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Check the datasheet for absolute maximum ratings to ensure safe operating conditions. Ensure the 4-SMD footprint matches your PCB layout constraints. Validate the enable/disable logic levels with your microcontroller or FPGA outputs.

Selection Notes

Select this oscillator when a stable 59.9749 MHz reference is required in space-constrained designs. The LVCMOS output simplifies integration with standard digital logic families. Consider the enable feature if power efficiency during idle states is critical. Compare performance metrics such as phase noise and stability against alternative solutions from other manufacturers to ensure suitability for high-precision applications.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequency options within a consistent 4-SMD form factor. These components are widely used in consumer electronics and industrial controls where reliable clock signals are essential. The manufacturer provides a range of frequencies to accommodate different system timing needs.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinouts but different frequencies, such as 18QHTF21-44.200-OE or 18QHTF21-48.636149-OE, provided the frequency difference is acceptable. Cross-brand replacements require matching voltage, output type, package size, and electrical characteristics.