18QHTF21-11.278336-PD

Overview

The 18QHTF21-11.278336-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 11.278336 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 efficiently. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm by 1.6mm. The component supports an operating temperature range suitable for industrial applications, ensuring reliable performance in various electronic circuits requiring precise timing signals.

Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient designs
• Integrates a standby mode to reduce power consumption when inactive
• Provides stable LVCMOS output signals for digital interface compatibility
• Utilizes a small form-factor surface-mount package for space-constrained layouts

Applications

• Clock generation for microprocessors and microcontrollers
• Timing reference for communication interfaces such as UART and SPI
• Synchronization sources for embedded systems and IoT devices
• Power management circuits requiring precise timekeeping

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail is stable and within the specified operating limits to maintain oscillator accuracy. Confirm that the PCB footprint matches the 4-SMD No Lead package dimensions precisely to avoid soldering issues during assembly. Check for any RoHS compliance certifications if required by your manufacturing standards.

Selection Notes

Select this component when a low-profile, low-power oscillator is needed for 1.8V logic systems. Consider the 11.278336 MHz frequency specifically for applications requiring exact baud rate calculations or specific clock division ratios. Evaluate the thermal stability needs of your environment to ensure the operating temperature range meets your project specifications. Compare the size constraints against other available packages to confirm the 2.0x1.6mm footprint fits your board layout.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature crystal oscillators. The series is characterized by its small footprint and low power consumption, making it suitable for portable electronics. Mercury Electronics is a established supplier of frequency control products, offering a range of quartz-based timing solutions including crystals, filters, and oscillators for various industrial and consumer applications.

Replacement Considerations

Direct replacements must match the 11.278336 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify that substitute components offer similar frequency stability and phase noise characteristics. Ensure the replacement part supports the same standby functionality if power management is critical to your design.