18QHTF21-40.699-PD

Oscillators Overview

The 18QHTF21-40.699-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 40.699 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise timing reference for electronic circuits requiring stable clock signals.

Oscillators Feature Summary

• Provides precise timing signals via standard crystal oscillator technology
• Supports low voltage operation at 1.8V with LVCMOS output compatibility
• Includes standby mode functionality for effective power management

Oscillators Applications

• Electronic devices requiring precise timing references
• Digital systems utilizing LVCMOS interface standards
• Compact consumer electronics needing small form factor oscillators

Oscillators Procurement Notes

Verify the exact frequency specification of 40.699 MHz against system requirements before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD No Lead package footprint matches the PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under intended environmental conditions.

Oscillators Selection Notes

Select this component when a 40.699 MHz clock signal is strictly required within a 1.8V logic environment. The choice is driven by the need for a small 2.0x1.6mm footprint suitable for space-constrained designs. Consider the LVCMOS output type for direct interfacing with compatible digital inputs. The power-down feature makes it suitable for battery-operated applications where standby current reduction is critical.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequency options while maintaining consistent electrical characteristics and physical dimensions. Mercury Electronics is a pioneer in quartz crystal manufacturing, providing reliable frequency control products including XOs, TCXOs, and VCXOs since 1973.

Oscillators Replacement Considerations

Direct substitutes may include other 40.699 MHz XO components with identical 1.8V LVCMOS specifications and 4-SMD No Lead packages. Verify pinout compatibility and thermal performance before swapping. Consult manufacturer cross-reference lists for equivalent parts from other suppliers offering similar form factors and electrical parameters.