18QHTF21-39.950-OE

Oscillators Overview

The 18QHTF21-39.950-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 39.95 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, specifically requiring a 1.8V supply voltage. A key functional characteristic is the inclusion of an enable/disable control pin, allowing for power management and signal gating as needed in circuit designs. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly processes.

Oscillators Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features integrated enable/disable control functionality
• Operates on a 1.8V single supply voltage
• Utilizes a compact 4-SMD no-lead surface mount package

Oscillators Applications

• Digital clock generation in embedded systems
• Timing reference for microcontrollers
• Communication interface synchronization
• Consumer electronics timing circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational needs. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD package dimensions to avoid assembly issues. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliability.

Oscillators Selection Notes

Select this component when a precise 39.95 MHz timing source is required in space-constrained designs. The 1.8V operating voltage makes it suitable for modern low-power digital logic families. The enable/disable feature adds flexibility for power-sensitive applications where the clock can be gated during idle states. Consider the small form factor if board real estate is limited.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 2.0x1.6mm SMD package. The series typically includes options with different output voltages and control features. The 'OE' suffix likely denotes the Enable/Disable pin configuration, distinguishing it from free-running variants. This family is designed for applications requiring reliable quartz-based timing in compact electronic devices.

Oscillators Replacement Considerations

Direct replacements must match the 39.95 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility, especially the enable/disable pin assignment. Cross-reference with other manufacturers offering similar ultra-small oscillators with enable functions. Ensure electrical characteristics such as phase noise and jitter meet or exceed the original specification.