18QHTF21-12.688656-PD

Overview

The 18QHTF21-12.688656-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12.688656 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component supports an operating temperature range suitable for general electronic applications.

Feature Summary

• Supports low voltage operation at 1.8V for energy efficiency
• Includes standby capability to reduce power consumption during idle periods
• Utilizes a small form factor SMD package for space-constrained designs

Applications

• Portable electronic devices requiring precise timing signals
• Embedded systems utilizing LVCMOS compatible interfaces
• Consumer electronics needing compact clock sources

Procurement Notes

Verify the specific ordering suffix PD against the manufacturer's official documentation to ensure correct packaging and handling specifications. Confirm that the 1.8V supply requirement aligns with your system design before procurement. Ensure compatibility with LVCMOS logic levels in the target circuit to prevent signal integrity issues.

Selection Notes

Select this component when a stable 12.688656 MHz reference is required for LVCMOS circuits. Consider the 1.8V supply constraint and the need for standby functionality. The 2.0mm x 1.6mm footprint is suitable for high-density PCB layouts where space is limited compared to larger oscillator packages.

Part Context

This part belongs to the 18QHTF series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and output types within a standardized small outline package. The 18QHTF21 variant specifically denotes the physical dimensions and pin configuration common to this product line.

Replacement Considerations

Direct substitutes must match the 12.688656 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD No Lead package. Verify pinout compatibility and electrical characteristics such as current consumption and standby behavior before substitution.