18QHTF21-11.650-PD

Overview

The 18QHTF21-11.650-PD is a 11.65 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates with an LVCMOS output logic and requires a 1.8V supply voltage. The device supports a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package, specifically identified as a 4-VDFN with dimensions of 3.2x2.5 mm. This component is designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for standard digital compatibility
• Integrated standby power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation in electronic circuits
• Timing reference for embedded systems
• Digital communication interfaces requiring stable frequency sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-VDFN footprint matches your PCB layout constraints. Request the official datasheet from Mercury Electronics to validate electrical characteristics and thermal performance specifications for your application environment.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS output. The choice is driven by the need for a small form factor suitable for dense surface-mount assemblies. Consider the availability of the specific 11.65 MHz frequency point within the Mercury product line. Evaluate the trade-off between the compact package size and thermal dissipation needs for the target application.

Part Context

This part belongs to the Mercury Electronics XO series, characterized by standardized LVCMOS outputs and various supply voltages. The '18' prefix typically indicates the 1.8V operating voltage variant. The model number encodes the specific frequency and package type. It serves as a direct replacement for other oscillators in similar applications where space and voltage constraints are critical factors in system design.

Replacement Considerations

Direct substitutes must match the 11.65 MHz frequency, 1.8V supply, and LVCMOS output. Verify pinout compatibility for the 4-SMD package. Check if alternative manufacturers offer equivalent timing accuracy and phase noise specifications. Ensure the replacement maintains the same physical dimensions to fit existing footprints without redesign.