18QHTF21-1.618034-PD

Overview

The 18QHTF21-1.618034-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.618034 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead surface-mount package, designed for integration into electronic circuits requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Surface-mount construction with no lead design

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and frequency tolerance are selected. Confirm that the 1.8V supply requirement aligns with the target system's voltage rails. Ensure the LVCMOS output compatibility matches the receiving logic inputs. Check for any specific environmental ratings if operating outside standard commercial ranges.

Selection Notes

Select this component when a precise 1.618034 MHz frequency is required with low-profile surface-mount constraints. Consider the 1.8V operation for low-power applications. Evaluate the need for power-down capabilities to manage system energy consumption. Verify that the LVCMOS output swing is compatible with downstream digital components.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz-based frequency products, offering various packages and frequencies. This specific model represents a standard configuration within their portfolio, focusing on reliability and compact form factors for modern electronics.

Replacement Considerations

Direct substitutes must match the 1.618034 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD No Lead package dimensions. Cross-reference pinouts and electrical characteristics carefully. Alternative parts from other manufacturers require verification of thermal and mechanical specifications.