18QHTF21-81.600-PD

Overview

The 18QHTF21-81.600-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 81.6 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function accessible via a standby control pin. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise clock signals in space-constrained electronic designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode for power-down functionality
• Compact surface-mount package design

Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded electronics requiring low-voltage operation

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 operating temperature range limitations defined in the official datasheet to ensure reliability under your environmental conditions.

Selection Notes

Select this component when a stable 81.6 MHz clock source is required within a 1.8V logic environment. The choice is driven by the need for a small form factor and integrated power management capabilities. Consider the LVCMOS output swing compatibility with downstream logic gates. Evaluate the thermal performance and stability needs against the standard specifications provided by the manufacturer.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The 'PD' suffix indicates the inclusion of a power-down feature. These components are designed for high-reliability applications in consumer and industrial electronics where size and power efficiency are critical factors.

Replacement Considerations

Direct substitutes must match the 81.6 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Consult the manufacturer's cross-reference list for approved alternatives.