18QHTF21-7.690-OE

Overview

The 18QHTF21-7.690-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 7.69 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This series supports various frequencies and voltages, including 3.3V and 2.5V variants.

Feature Summary

• Supports enable/disable functionality for power management
• Utilizes LVCMOS output logic for digital interface compatibility
• Compact surface-mount design suitable for space-constrained PCB layouts

Applications

• Consumer electronics requiring precise timing signals
• Communication equipment utilizing standard clock frequencies
• Embedded systems needing low-power oscillators

Procurement Notes

Verify the specific supply voltage requirement against the target circuit design, as this model specifies 1.8V operation. Confirm that the LVCMOS output level matches the input thresholds of the receiving component. Ensure the 4-SMD no-lead package footprint aligns with the board layout specifications. Check for any specific ordering suffixes required for tape and reel packaging if applicable to the production line.

Selection Notes

Select this component when a 7.69 MHz clock signal is required with a 1.8V supply constraint. Consider the enable/disable feature if system-level power saving is necessary. Compare against other voltage variants like 3.3V or 2.5V if the system architecture differs. Evaluate the physical size constraints given the small 2.0x1.6mm package dimensions relative to available board space.

Part Context

This part belongs to the QHTF21 series of crystal oscillators from Mercury Electronics. The series offers multiple frequency options and voltage levels, including 3.3V and 2.5V versions. The manufacturer specializes in quartz crystals and timing components. The 'OE' suffix typically indicates an enable pin configuration. The product line targets applications requiring reliable frequency control in compact form factors.

Replacement Considerations

Direct substitutes include other 7.69 MHz LVCMOS oscillators with identical 1.8V supply requirements and 4-SMD no-lead packages. Verify pinout compatibility and electrical characteristics before substitution. Other voltage variants within the same series may require circuit adjustments.