18QHTF21-11.5278-PD

Overview

The 18QHTF21-11.5278-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 11.5278 MHz and utilizes LVCMOS output logic. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby (power-down) function to reduce current consumption when inactive. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Integrated standby mode for power management
• LVCMOS output interface compatibility
• Compact 2.0x1.6mm surface-mount footprint

Applications

• Portable electronic devices requiring low power consumption
• Communication modules needing precise clock signals
• Embedded systems with limited supply voltage constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package size fits within your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a stable 11.5278 MHz clock source is required in a small form factor. The integrated power-down feature makes it suitable for battery-operated equipment where energy efficiency is critical. Consider the LVCMOS output level compatibility with your downstream digital logic inputs. Evaluate the operating temperature range to ensure performance stability under your environmental conditions.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of low-power crystal oscillators. The series is characterized by its small SMD packages and support for standby functions. Mercury Electronics specializes in frequency control products, including crystals, oscillators, and filters, offering solutions for various timing applications in consumer and industrial electronics.

Replacement Considerations

Direct substitutes may include other 11.5278 MHz LVCMOS oscillators in 2.0x1.6mm packages from different manufacturers. Verify pinout compatibility and electrical specifications such as supply voltage and output drive strength. Cross-reference with similar Mercury parts like the 18QHTF21-8.000-PD if frequency differences are acceptable.