18QHTF21-6.772-PD

Overview

The 18QHTF21-6.772-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 6.772 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (standby) control function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V for energy efficiency
• Includes standby mode capability via power-down control
• Provides stable LVCMOS clock signals for digital circuits
• Utilizes a small form factor surface-mount package

Applications

• Portable electronic devices requiring low power consumption
• Battery-operated systems needing efficient clock sources
• Compact digital circuitry utilizing LVCMOS interfaces
• Embedded timing applications in space-constrained designs

Procurement Notes

Verify the specific frequency suffix matches the required 6.772 MHz specification. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint fits the PCB layout constraints. Check for any specific operating temperature range requirements relative to the application environment.

Selection Notes

Select this component when a precise 6.772 MHz clock signal is needed within a minimal physical footprint. The 1.8V operation makes it suitable for modern low-power digital logic families. The inclusion of a power-down feature allows for dynamic power management strategies. Consider the thermal characteristics and stability requirements of the specific application context.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature crystal oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix indicates the presence of a power-down pin or control mechanism. This model specifically targets applications demanding high precision in a small SMD package.

Replacement Considerations

Direct substitutes must match the 6.772 MHz frequency, 1.8V voltage, and LVCMOS output. Verify compatibility with the 2.0x1.6mm 4-SMD no-lead footprint. Ensure equivalent electrical parameters such as load regulation and phase noise if critical. Consult manufacturer cross-reference lists for verified alternatives.