18QHTF21-12.68857-OE

Overview

The 18QHTF21-12.68857-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.68857 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature for power management. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications.

Feature Summary

• Supports LVCMOS output logic for digital signal compatibility
• Features enable/disable functionality for power optimization
• Designed as a standard XO for precise timing generation

Applications

• Timing and clock signal generation in electronic devices
• Digital circuit synchronization
• Embedded system clock sources

Procurement Notes

Verify the specific suffix OE against official Mercury Electronics documentation to confirm exact electrical tolerances and pinout configurations. Ensure the 1.8V supply requirement aligns with target system voltages before integration. Confirm RoHS compliance status through current manufacturer declarations.

Selection Notes

Select this component when a 12.68857 MHz frequency is required for LVCMOS interfaces. Consider the 1.8V operating voltage constraint and the need for active enable control. The 4-SMD package size should match available PCB real estate constraints compared to larger oscillator formats.

Part Context

This part belongs to the QHTF series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a standardized footprint. The 18QHTF21 variant specifically denotes the 1.8V supply and 4-pin SMD form factor common in low-power portable electronics.

Replacement Considerations

Direct substitutes include other 12.68857 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify equivalent specifications such as load capacitance and drive level before substitution.