18QHTF21-9.846-PD

Overview

The 18QHTF21-9.846-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a frequency of 9.846 MHz and utilizes LVCMOS output logic levels. The component is designed for low-power applications, functioning with a supply voltage of 1.8V. It includes a standby or power-down feature to manage energy consumption when not in active use. The device is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power management
• Low-voltage operation at 1.8V

Applications

• General clock signal generation in embedded systems
• Timing reference for microcontrollers
• Digital communication interfaces requiring stable frequency sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your application environment.

Selection Notes

Select this component when a precise 9.846 MHz timing source is required with minimal power consumption. The LVCMOS output simplifies interfacing with standard digital logic families. Consider the 1.8V supply requirement to ensure compatibility with low-voltage processors. The compact SMD package aids in space-constrained designs. Verify that the standard XO stability meets the jitter and accuracy needs of the target application.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic Ind. Co. Ltd. The series typically offers various frequency options within a standardized low-profile package. These components are designed for consumer electronics and portable devices where size and power efficiency are critical. The manufacturer specializes in quartz-based frequency control products, providing reliable timing solutions.

Replacement Considerations

Direct substitutes may include other 9.846 MHz LVCMOS oscillators in a 4-SMD no-lead package with 1.8V operation. Verify pinout compatibility and electrical parameters such as frequency stability and phase noise. Ensure the replacement part supports the same standby functionality if power management is a design constraint.