18QHTF21-15.860-OE

Oscillators Overview

The 18QHTF21-15.860-OE is a high-stability crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, designed for precision timing applications requiring low phase noise and tight frequency tolerance. Operating at a fundamental frequency of 15.860 MHz, this component utilizes HC-49/U package dimensions to ensure mechanical robustness and ease of integration into standard PCB layouts. The device features an OE (Output Enable) pin, allowing for power management control during idle periods to reduce overall system consumption. It supports a load capacitance typically ranging from 10pF to 30pF, ensuring compatibility with various microcontroller and FPGA clock inputs. The unit operates within a temperature range of -40°C to +85°C, providing reliable performance in industrial environments.

Oscillators Feature Summary

• Integrated output enable functionality for dynamic power management
• High stability quartz crystal element for precise frequency generation
• Standardized HC-49/U surface mount or through-hole compatible package
• Wide operating temperature range suitable for industrial applications

Oscillators Applications

• Industrial control systems requiring precise clock synchronization
• Telecommunications equipment needing stable carrier frequencies
• Consumer electronics with power-sensitive clock requirements
• Automotive infotainment systems demanding reliability across temperature extremes

Oscillators Procurement Notes

Verify the specific load capacitance requirement against your circuit design before procurement, as mismatched capacitors can cause frequency drift. Confirm the package variant (SMD vs. Through-Hole) matches your PCB footprint, as Mercury offers both configurations under similar part numbering schemes. Ensure the OE pin logic level aligns with your system's voltage rails to prevent unintended disable states. Request the latest datasheet revision to confirm any updates in electrical characteristics or recommended soldering profiles. Cross-reference the manufacturing date code if long-term supply continuity is critical for your production timeline.

Oscillators Selection Notes

Select this model when application demands exceed standard consumer-grade oscillators but do not require the cost premium of oven-controlled units. Prioritize this component for designs where power conservation during standby modes is essential due to the integrated enable pin. Consider the HC-49/U form factor if space constraints allow for larger components compared to SMD MEMS alternatives. Evaluate the -40°C to +85°C range against your environmental exposure; if wider ranges are needed, consult Mercury’s extended temperature series. Compare phase noise specifications against other 15.860 MHz options to ensure signal integrity meets your system’s jitter budget.

Oscillators Part Context

This oscillator belongs to Mercury Electronics’ general-purpose crystal oscillator lineup, which focuses on balancing performance with cost-effectiveness for mass-market electronics. The 18QHTF21 series typically denotes a specific family of fundamental mode crystals optimized for digital clocking. The suffix 'OE' explicitly indicates the inclusion of an enable control feature, distinguishing it from continuous-output variants. This model serves as a bridge between basic discrete crystals and fully integrated VCXOs, offering fixed frequency stability with added power control flexibility for embedded systems.

Oscillators Replacement Considerations

Direct substitutes include other 15.860 MHz HC-49/U oscillators with OE pins from manufacturers like Epson or NDK, provided load capacitance and drive levels match. Verify that replacement parts maintain identical pinout configurations, particularly the location of the enable pin relative to ground and VCC. Check if alternative brands offer the same temperature grade (-40°C to +85°C) to ensure environmental reliability parity. Some generic replacements may lack the OE functionality, requiring manual gating of the clock signal in software or hardware.