18QHTF21-118.800-PD

Overview

The 18QHTF21-118.800-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 118.8 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby and power-down capabilities
• Utilizes LVCMOS output logic for standard digital interfacing

Applications

• Clock signal generation in embedded systems
• Timing reference for high-speed data interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications to ensure consistent performance. Ensure the PCB layout accommodates the 2.0x1.6mm SMD footprint and maintains appropriate clearance for thermal and electrical isolation.

Selection Notes

Select this component when a precise 118.8 MHz clock source is required within space-constrained designs. The choice is driven by the need for low-power consumption via the standby feature and compatibility with 1.8V logic families. Consider the small form factor as a primary advantage for dense board layouts where larger packages are unsuitable.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in miniature crystal oscillators. The series is characterized by its small 2.0x1.6mm footprint and support for various frequencies. The 'PD' suffix typically indicates the inclusion of power-down functionality, distinguishing it from standard continuous-operation variants within the same family.

Replacement Considerations

Direct substitutes must match the 118.8 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering equivalent size and electrical specs if Mercury Electronics stock is unavailable.