18QHTF21-39.845888-PD

Oscillators Overview

The 18QHTF21-39.845888-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 39.845888 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 2.5V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.5mm x 2.0mm.

Oscillators Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic for digital interfacing
• Includes standby functionality to reduce power consumption during inactive periods
• Designed as a standard crystal oscillator for precise clock generation

Oscillators Applications

• Embedded systems requiring stable clock signals
• Communication modules utilizing specific baud rates
• Consumer electronics with space-constrained PCB layouts

Oscillators Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 2.5V supply voltage aligns with the target circuit's power rails. Ensure the 4-SMD no-lead package footprint matches the board layout to prevent assembly issues. Cross-reference the manufacturer datasheet for thermal performance limits.

Oscillators Selection Notes

Select this component when a 39.845888 MHz clock source is required with low voltage operation. The LVCMOS interface ensures compatibility with standard digital logic families. The small form factor makes it suitable for dense circuit designs. Verify that the operating temperature range meets the environmental conditions of the intended application.

Oscillators Part Context

This part belongs to the Enetseal+ series from Mercury Electronics, which focuses on frequency control products. Mercury Electronics has been manufacturing these components since 1973, establishing itself as a pioneer in the Taiwan crystal industry. The series typically offers various frequencies and voltage options within standardized packages.

Oscillators Replacement Considerations

Direct substitutes must match the 39.845888 MHz frequency, 2.5V supply, LVCMOS output, and 2.5x2.0mm SMD package. Check for equivalent parts from other manufacturers offering identical pinouts and electrical characteristics to ensure seamless integration without redesigning the PCB.