18QHTF21-12.5288-PD

Overview

The 18QHTF21-12.5288-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 12.5288 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 package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• Precision timing circuits
• Digital signal processing systems
• Communication equipment clocking

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required voltage levels and output types. Confirm that the 1.8V supply requirement aligns with the target system design. Check for any specific environmental ratings if operating in extreme conditions. Ensure the 4-SMD footprint matches the PCB layout constraints. Validate the LVCMOS logic level against the receiving component inputs.

Selection Notes

Select this component when a 12.5288 MHz reference is required with low power consumption capabilities. The 1.8V operation makes it suitable for modern low-voltage digital designs. The integrated power-down feature aids in battery-operated applications. Consider the small form factor for space-constrained layouts. Ensure the LVCMOS output is compatible with the downstream logic family.

Part Context

This part belongs to the Mercury Electronics XO series, designed for general-purpose timing applications. The manufacturer specializes in quartz crystals and oscillators, offering various frequency options within the same package family. This specific model provides a fixed frequency output, distinguishing it from programmable alternatives.

Replacement Considerations

Direct substitutes may include other 12.5288 MHz LVCMOS oscillators in a 4-SMD package from different manufacturers. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with similar Mercury models like the 3QHTF21 series if voltage requirements differ.