18QHTF21-121.109-PD

Overview

The 18QHTF21-121.109-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 121.109 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and includes a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals within a small form factor.

Feature Summary

• LVCMOS output interface
• Standby power down capability
• Compact 4-SMD no lead package

Applications

• General purpose clock generation
• Digital signal processing systems
• Communication equipment timing

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD package footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet for your environment.

Selection Notes

Select this model when a 121.109 MHz clock source is required with low power consumption due to the standby feature. The LVCMOS output is suitable for standard digital logic interfaces. Consider the 2.0x1.6mm size for space-constrained designs. Ensure compatibility with 1.8V logic levels across the operating temperature range.

Part Context

This part belongs to the 18QHTF series of surface mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and supply voltages. The 'PD' suffix indicates the inclusion of a power down pin or function. These components are generally used as primary clock sources in electronic devices requiring stable frequency generation.

Replacement Considerations

Direct replacements must match the 121.109 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical specifications and pinout compatibility. Cross-reference with other manufacturers offering similar SMD oscillators if availability is an issue.