18QHTF21-85.680-PD

Overview

The 18QHTF21-85.680-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 85.68 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is suitable for applications requiring precise timing signals in space-constrained electronic systems.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS compatibility
• Includes power-down standby functionality for energy efficiency
• Utilizes a small form-factor 4-SMD no-lead package

Applications

• General-purpose digital timing circuits
• Embedded system clock generation
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package footprint matches your PCB layout constraints. Cross-reference the part number suffix with official manufacturer documentation to ensure correct revision and packaging specifications.

Selection Notes

Select this component when a stable 85.68 MHz reference signal is required in a low-power environment. The LVCMOS output ensures compatibility with standard logic families operating at 1.8V. Consider the physical size constraints as the 2.0x1.6 mm package is among the smaller options available. Evaluate the need for power-down control if battery life or thermal management is a critical design factor.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount solutions. The series typically offers various frequencies within a standardized 1.8V LVCMOS format. The 85.68 MHz variant serves as a specific clock source for processors or communication interfaces needing this exact harmonic frequency.

Replacement Considerations

Direct replacements must match the 85.68 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before substitution.