18QHTF21-1.23456-OE

Overview

The 18QHTF21-1.23456-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.23456 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable function to manage power consumption effectively. The component 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 signal compatibility
• Integrated enable and disable control functionality
• Low voltage operation at 1.8V supply
• Surface-mount 4-SMD no lead package design

Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Digital communication interface synchronization
• Consumer electronics timing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the 4-SMD no lead footprint matches your PCB layout exactly. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly and long-term performance.

Selection Notes

Select this component when a precise 1.23456 MHz clock source is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the enable/disable feature if power management during idle states is critical. The small form factor makes it ideal for space-constrained designs where traditional through-hole oscillators cannot fit.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequency options while maintaining consistent electrical characteristics and package dimensions. These oscillators are designed for general-purpose timing applications requiring stable frequency generation. The manufacturer specializes in quartz-based frequency control products, providing reliability for industrial and consumer electronic markets.

Replacement Considerations

Direct replacements must match the 1.23456 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar XO components in the same package style to ensure functional equivalence without redesigning the PCB layout.