18QHTF21-34.7478-OE

Oscillators Overview

The 18QHTF21-34.7478-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 34.7478 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This series is part of Mercury's quartz-based frequency control products, certified under ISO 9001:2015 standards.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable functionality for power management
• Compact 4-SMD no-lead surface mount package
• Low voltage operation at 1.8V

Oscillators Applications

• Timing and clock signal generation in electronic devices
• Consumer electronics requiring precise frequency references
• Communication equipment utilizing standard XO interfaces

Oscillators Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package footprint matches the PCB layout requirements. Check for RoHS compliance status if required by project specifications.

Oscillators Selection Notes

Select this component when a small form factor oscillator is required for 1.8V logic systems. The LVCMOS output is suitable for direct interfacing with microcontrollers or FPGAs. Consider the enable pin feature if dynamic power saving is necessary. Verify that the 34.7478 MHz frequency meets the system timing requirements without additional dividers.

Oscillators Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, a pioneer in Taiwan's quartz industry since 1973. The series includes various frequencies such as 6.76438 MHz, 13.1313 MHz, and 21.2 MHz. These oscillators are designed for general-purpose timing applications using standard quartz crystal technology.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with different frequencies, such as 18QHTF21-37.200-OE, provided the frequency difference is acceptable. Cross-brand replacements require matching LVCMOS logic, 1.8V supply, and 2.0x1.6mm package dimensions.