18QHTF21-121.109-OE

Overview

The 18QHTF21-121.109-OE is a MEMS oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 121.109 MHz. It utilizes PECL output logic and supports a supply voltage range of 2.5V to 3.3V. The device features a stability of 25 PPM and is housed in a compact 2.0mm x 1.6mm surface-mount package with no lead construction.

Feature Summary

• MEMS technology for enhanced reliability
• PECL output logic interface
• Compact 4-SMD, No Lead package

Applications

• High-speed data transmission systems
• Telecommunications equipment
• Network infrastructure components

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct voltage and logic level specifications. Confirm that the PECL output requirement matches the receiving circuit design. Check for any environmental or temperature grade variations if operating outside standard conditions.

Selection Notes

Select this component when a stable 121.109 MHz clock signal is required with PECL compatibility. Ensure the system power supply accommodates the 2.5V to 3.3V range. Consider the 25 PPM stability for timing-sensitive applications requiring moderate precision.

Part Context

This part belongs to the 18QHTF21 series of MEMS oscillators from Mercury Electronics. The series offers various frequencies and voltages, typically packaged in small SMD footprints suitable for dense PCB layouts. It serves as a direct replacement for traditional crystal oscillators in modern digital designs.

Replacement Considerations

Direct substitutes include other 121.109 MHz MEMS oscillators with PECL outputs and compatible voltage ranges. Verify pinout compatibility and mechanical dimensions before substitution.