18QHTF21-85.120-PD

Overview

The 18QHTF21-85.120-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a fixed frequency of 85.12 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a standby mode for power-down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby functionality to reduce power consumption during idle states
• Designed as a standard XO (Crystal Oscillator) for precise timing applications

Applications

• General clock generation for embedded systems
• Timing reference for digital signal processing circuits
• Clock source for communication interfaces requiring 85.12 MHz

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure 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. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when an 85.12 MHz clock signal is required with low voltage operation. Consider the 1.8V supply constraint and LVCMOS output swing limitations. The small 2.0x1.6 mm package is suitable for space-constrained designs. Evaluate the need for standby control if power management is critical for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a compact SMD form factor. The series typically supports LVCMOS outputs and includes standby options. Other variants in this series include different frequencies such as 51.2 MHz and 68.085 MHz, sharing similar physical and electrical characteristics.

Replacement Considerations

Direct substitutes may include other 85.12 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package from manufacturers like Epson or NDK. Verify pinout compatibility and electrical specifications carefully. Cross-reference with Mercury's own series variants if frequency adjustments are permissible.