18QHTF21-12.040-PD

Overview

The 18QHTF21-12.040-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 12.04 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and an integrated standby or power-down mode to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes. This component serves as a precise clock source for digital circuits requiring stable timing signals within the specified operating temperature range.

Feature Summary

• Generates a stable 12.04 MHz clock signal using LVCMOS output interface
• Supports low-voltage operation with 1.8V supply requirement
• Includes standby functionality for power-down state management

Applications

• Digital system clock generation
• Microcontroller timing sources
• Communication interface synchronization

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's current datasheet before procurement. Ensure compatibility with the target board's thermal profile and soldering specifications. Confirm that the 1.8V supply rail meets the required noise and stability criteria for the oscillator's performance. Check for any recent updates to the RoHS compliance status or material declarations provided by Mercury Electronics Ind. Co. Ltd.

Selection Notes

Select this component when a 12.04 MHz frequency is specifically required for the application design. Consider the 1.8V supply constraint and ensure the system architecture supports this voltage level. The LVCMOS output is suitable for standard digital logic families. Evaluate the need for the standby feature if power management is a critical design parameter. Verify that the 4-SMD package dimensions fit within the available PCB real estate constraints.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics Ind. Co. Ltd. The series typically offers various frequency options and supply voltages. The 'PD' suffix likely indicates a specific package or tape-and-reel configuration, though exact details require datasheet confirmation. Mercury Electronics specializes in quartz crystal and frequency control products, leveraging decades of manufacturing expertise in Taiwan.

Replacement Considerations

Direct substitutes may include other 12.04 MHz LVCMOS oscillators with 1.8V supply and similar footprint. Verify pinout compatibility and electrical characteristics such as load capacitance and drive strength. Cross-reference with Mercury's own product line for alternative frequencies or voltage options if the exact part is unavailable.