18QHTF21-25.390-PD

Oscillators Overview

The 18QHTF21-25.390-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 25.39 MHz and utilizes LVCMOS output logic for digital signal interfacing. The device is designed for low-power applications, featuring a supply voltage of 1.8V and an integrated standby or power-down mode to reduce energy consumption during idle periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital compatibility
• Includes standby or power-down functionality for energy efficiency
• Utilizes a compact 4-SMD no-lead surface-mount package

Oscillators Applications

• General-purpose clock generation in embedded systems
• Timing reference for low-voltage digital circuits
• Portable electronic devices requiring power management

Oscillators Procurement Notes

Verify the exact operating temperature range and load capacitance requirements against your specific circuit design before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead footprint matches your PCB layout constraints. Cross-reference the part number suffix with official manufacturer documentation to ensure correct packaging and revision status.

Oscillators Selection Notes

Select this component when a precise 25.39 MHz timing source is required for 1.8V logic families. Consider the LVCMOS interface compatibility with downstream microcontrollers or FPGAs. Evaluate the power-down feature if battery life or thermal management is critical. Compare the 2.0x1.6 mm package size against available board space and mounting density requirements.

Oscillators Part Context

This oscillator belongs to the QHTF series from Mercury Electronics, which focuses on small-form-factor solutions. The '18' prefix typically indicates the 1.8V supply variant within this product line. It serves as a direct replacement for legacy through-hole oscillators where space reduction is necessary. The series supports various frequencies tailored for communication and computing applications.

Oscillators Replacement Considerations

Direct substitutes include other 25.39 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical specifications such as jitter and stability before substitution. Alternative models from the same manufacturer may offer different temperature grades or packaging options.