18QHTF21-4.995-PD

Oscillators Overview

The 18QHTF21-4.995-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 4.995 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports Low Voltage CMOS output logic for digital interfacing
• Includes standby mode capability for power management
• Utilizes surface-mount packaging for automated assembly

Oscillators Applications

• General clock signal generation in electronic circuits
• Timing reference for low-voltage digital systems
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and tape/reel configuration. Confirm that the 1.8V supply requirement aligns with the target circuit design. Check for any specific temperature range limitations or RoHS compliance documentation required for the project.

Oscillators Selection Notes

Select this component when a precise 4.995 MHz timing source is required for low-power applications. Ensure the host system supports LVCMOS logic levels and provides the necessary standby control signals. Consider the small footprint requirements for space-constrained designs.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, all sharing a common compact form factor suitable for modern consumer electronics and portable devices requiring stable clock signals.

Oscillators Replacement Considerations

Direct substitutes may include other 4.995 MHz LVCMOS oscillators in 2.0x1.6mm packages from manufacturers such as Epson or NDK. Verify pinout compatibility and electrical specifications before substitution.