18QHTF21-85.000-PD

Overview

The 18QHTF21-85.000-PD is a standard frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 85 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby mode for energy efficiency. It utilizes a compact 4-SMD, no-lead surface-mount package. This component is designed for applications requiring precise clock signals in digital systems.

Feature Summary

• Provides stable 85 MHz clock signal via LVCMOS interface
• Supports low-power operation with dedicated power-down mode
• Utilizes leadless surface-mount packaging for space-constrained designs

Applications

• Digital signal processing circuits
• Communication equipment clocking
• Microcontroller system timing

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure compatibility with LVCMOS logic levels for connected components. Check for any specific handling instructions regarding the leadless SMD package during assembly.

Selection Notes

Select this oscillator when a precise 85 MHz reference is required in a small form factor. Consider the 1.8V supply constraint and the availability of a power-down feature for battery-sensitive applications. Compare performance metrics such as phase noise and stability against alternative models if high-frequency precision is critical for the target application.

Part Context

This part belongs to the QHTF21 series of surface-mount oscillators from Mercury Electronics. The series is characterized by its small footprint and low power consumption, making it suitable for portable electronics and dense PCB layouts. The 'PD' suffix typically indicates the inclusion of a power-down control function within the device architecture.

Replacement Considerations

Direct substitutes may include other 85 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson or SiTime. Verify pinout compatibility and electrical specifications closely. Cross-reference with Mercury's own product line for updated revisions or alternative frequencies within the same package family.