18QHTF21-34.7478-PD

Oscillators Overview

The 18QHTF21-34.7478-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 34.7478 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down mode for standby functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy efficiency
• Provides LVCMOS output signal compatibility

Oscillators Applications

• General clock generation in digital circuits
• Embedded systems requiring precise timing references
• Portable electronics utilizing low-power oscillators

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure that the 1.8V supply rail is stable and within the specified operating range to maintain oscillator performance. Confirm that the PCB layout accommodates the 4-SMD no-lead package dimensions accurately to prevent soldering defects.

Oscillators Selection Notes

Select this component when a 34.7478 MHz reference is required with minimal power consumption. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the physical size constraints of the application, as the 2.0x1.6 mm footprint is suitable for space-sensitive designs. Evaluate the need for power-down functionality if battery life is a critical factor.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies tailored for different digital applications. The 'PD' suffix indicates the inclusion of a power-down pin or feature, allowing the device to be disabled when not in use to reduce current draw.

Oscillators Replacement Considerations

Direct replacements must match the 34.7478 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical specifications from alternative manufacturers to ensure functional equivalence.