18QHTF21-82.705-PD

Overview

The 18QHTF21-82.705-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 82.705 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. A key operational feature is the inclusion of a standby mode, which allows for power down functionality to conserve energy when the oscillator is not actively required by the system. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features a standby mode enabling power down capability
• Operates on a single 1.8V supply voltage

Applications

• General clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's jitter specifications. Ensure the PCB layout supports the 4-SMD no-lead footprint dimensions accurately to guarantee reliable soldering and electrical performance during assembly.

Selection Notes

Select this component when a precise 82.705 MHz timing source is required within a low-power constraint. The choice is driven by the need for LVCMOS compatibility and the ability to disable the clock via standby mode. Consider the small 2.0x1.6 mm package size if board real estate is limited. Validate that the environmental conditions align with the specified operating temperature range for long-term reliability.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options within a standardized small outline package. The 'PD' suffix likely indicates a specific pin configuration or packaging variant distinct from other series members like the '-OE' version, which may offer enable/disable control rather than just standby.

Replacement Considerations

Direct replacements must match the 82.705 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify thermal and electrical compatibility with existing circuitry before substituting.