18QHTF21-11.94725-PD

Overview

The 18QHTF21-11.94725-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 11.94725 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a Standby (Power Down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. This component is designed for applications requiring precise timing signals within low-power electronic systems.

Feature Summary

• Supports Standby (Power Down) mode for power efficiency
• Utilizes LVCMOS output logic for digital interface compatibility
• Compact 4-SMD No Lead surface mount package

Applications

• Low-power embedded systems
• Digital signal processing circuits
• Communication modules requiring precise clocking

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD No Lead package footprint matches your PCB layout constraints. Check for any specific RoHS or environmental compliance certifications required for your region. Validate the standby current specifications if power management is critical to your application.

Selection Notes

Select this oscillator when a stable 11.94725 MHz reference is needed for LVCMOS-compatible digital logic. Consider the 1.8V operating voltage to ensure compatibility with modern low-voltage microcontrollers and FPGAs. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is essential. Evaluate the thermal performance and stability requirements to ensure the standard series meets your environmental conditions.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry. This series typically offers standard oscillators with various frequencies and supply voltages, catering to general-purpose timing needs in consumer and industrial electronics.

Replacement Considerations

Direct substitutes may include other 11.94725 MHz LVCMOS oscillators in a 2.0x1.6mm SMD package with 1.8V operation. Verify pinout compatibility and electrical parameters such as phase noise and jitter before substitution. Alternative manufacturers should be evaluated for equivalent frequency stability and temperature range performance.