18QHTF21-29.970476-PD

Oscillators Overview

The 18QHTF21-29.970476-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 29.970476 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby mode capability for power management
• Utilizes LVCMOS output logic for digital interface compatibility

Oscillators Applications

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

Oscillators Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD No Lead package dimensions fit within your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Oscillators Selection Notes

Select this component when a precise 29.970476 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage as a primary constraint for power supply design. The integrated standby feature makes it suitable for battery-powered or energy-efficient applications. Evaluate the physical size of the 4-SMD package against available board space.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The '18' prefix typically indicates the 1.8V supply voltage variant, while 'QHTF21' denotes the specific package and performance class. The '-PD' suffix confirms the inclusion of a power-down or standby pin functionality, distinguishing it from continuous-operation variants.

Oscillators Replacement Considerations

Direct replacements must match the 29.970476 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify that substitute parts also support the standby function if power management is critical. Cross-reference pinouts and electrical characteristics to ensure functional compatibility.