18QHTF21-70.000-PD

Overview

The 18QHTF21-70.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 70.0 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a power-down feature for standby mode. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• LVCMOS output logic interface
• Integrated power-down functionality for standby mode
• Compact 4-SMD no lead surface mount package

Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your design specifications before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 2.0x1.6 mm footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a 70.0 MHz clock source with LVCMOS outputs is required. Consider the 1.8V supply voltage compatibility with your system architecture. Evaluate the need for power-down capabilities to manage energy consumption during idle periods. Assess the suitability of the small 4-SMD package for space-constrained designs compared to larger oscillator options.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The 'PD' suffix indicates the inclusion of a power-down pin or function. The 18QHTF21 prefix typically denotes the series and package type, specifically the 2.0x1.6 mm SMD form factor common in modern compact electronics.

Replacement Considerations

Direct substitutes include other 70.0 MHz LVCMOS oscillators in 2.0x1.6 mm packages from compatible manufacturers. Verify electrical parameters such as supply voltage, current consumption, and output swing levels. Ensure mechanical footprint and pinout compatibility if replacing on an existing board.