18QHTF21-4.639-PD

Oscillators Overview

The 18QHTF21-4.639-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fundamental frequency of 4.639 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 function to minimize energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6mm, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• LVCMOS output interface for digital signal compatibility
• Integrated power-down mode for reduced current consumption
• Compact 4-SMD no-lead surface mount package

Oscillators Applications

• Portable electronic devices requiring low power consumption
• Embedded systems utilizing LVCMOS logic interfaces
• Consumer electronics with space-constrained PCB layouts

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rail capabilities. Ensure the 4-SMD no-lead footprint matches the designated land pattern on the PCB to guarantee proper soldering and mechanical stability during assembly processes.

Oscillators Selection Notes

Select this component when a precise 4.639 MHz clock source is required for LVCMOS-compatible digital circuits. The choice is driven by the need for low operating voltage and active power management features. Consider the small form factor if board real estate is limited. Validate that the manufacturer's quality certifications meet the end-product industry standards.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a manufacturer specializing in quartz frequency control products. The series typically offers various standard frequencies within a unified package format. Mercury Electronics has established itself as a pioneer in the Taiwanese quartz industry, providing components for global electronics markets.

Oscillators Replacement Considerations

Direct substitutes must match the 4.639 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical specifications with alternative manufacturers to ensure seamless integration without redesigning the host circuit board.