18QHTF21-85.250-PD

Overview

The 18QHTF21-85.250-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 85.25 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down standby function controlled via the PD suffix. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down standby functionality to reduce consumption
• Utilizes a surface-mount 4-SMD no-lead package design

Applications

• Digital signal processing systems requiring precise clocking
• Communication equipment utilizing standard frequency references
• Embedded systems powered by 1.8V logic rails

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power architecture. Ensure the 4-SMD footprint matches the PCB layout constraints. Cross-reference the part number suffix to confirm the presence of the power-down feature as indicated by the PD designation.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The integrated power-down capability makes it suitable for battery-operated or energy-efficient designs. Consider the small 2.0x1.6mm form factor for space-constrained applications. Validate that the 85.25 MHz frequency meets the system timing specifications without requiring external dividers.

Part Context

This model belongs to the 18QHTF21 series of quartz oscillators from Mercury Electronics. The series typically offers various frequencies within a standardized 1.8V LVCMOS format. The PD suffix specifically denotes the inclusion of a power-down control pin, distinguishing it from continuous-operation variants. This family targets modern portable electronics needing reliable clock sources in minimal footprints.

Replacement Considerations

Direct substitutes include other 85.25 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package with 1.8V operation and power-down support. Verify pinout compatibility and electrical parameters such as jitter and stability before substitution.