18QHTF21-85.125-PD

Overview

The 18QHTF21-85.125-PD is a fixed frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 85.125 MHz and utilizes LVCMOS output logic. The device is designed for low voltage applications, requiring a 1.8V supply voltage. It features a standby mode for power management. The component is housed in a compact 4-SMD, No Lead package, suitable for surface mount assembly on printed circuit boards.

Feature Summary

• Generates a stable 85.125 MHz clock signal using LVCMOS logic levels
• Operates with a 1.8V power supply for low voltage system integration
• Includes a standby function to reduce power consumption when inactive
• Utilizes a leadless SMD package for efficient surface mount placement

Applications

• Digital signal processing systems requiring precise timing references
• Communication equipment utilizing standard clock frequencies
• Embedded systems with low voltage power constraints
• Data acquisition modules needing stable oscillator sources

Procurement Notes

Verify the exact frequency specification of 85.125 MHz against system requirements before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD No Lead package footprint matches the PCB layout. Check for any specific operating temperature range limitations defined in the official datasheet for the intended environment.

Selection Notes

Select this component when a standard LVCMOS output is required for digital interfaces. Consider the 1.8V supply requirement as a primary constraint for power budgeting. The standby feature offers an advantage for battery-powered or energy-efficient designs. Evaluate the physical dimensions of the 4-SMD package against available board space constraints during the selection process.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low voltage XO solutions. The manufacturer has extensive experience in quartz crystal production since 1973. This series typically supports various standard frequencies within a compact form factor. The PD suffix indicates a specific packaging or tape-and-reel configuration provided by the distributor.

Replacement Considerations

Direct substitutes must match the 85.125 MHz frequency, 1.8V supply, and LVCMOS output. Compatible packages include 4-SMD No Lead types with identical pin configurations. Verify thermal performance and frequency stability specifications against the original part to ensure functional equivalence in the application.