18QHTF21-117.9648-PD

Overview

The 18QHTF21-117.9648-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 117.9648 MHz with a supply voltage of 1.8V. The device features LVCMOS output logic and supports a power-down standby mode. It exhibits a frequency stability of ±50ppm and functions within an operating temperature range of -40°C to +85°C. Maximum current consumption is specified as 28mA. The component utilizes a 4-SMD, no lead surface mount package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage 1.8V operation with LVCMOS output compatibility
• Includes power-down standby functionality for energy management
• Utilizes compact 4-SMD surface mount packaging for space-constrained designs

Applications

• High-speed digital signal processing systems
• Communication equipment requiring precise clock synchronization
• Embedded systems with strict size limitations

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct package and tolerance specifications. Confirm that the 1.8V supply voltage aligns with target system requirements. Check for updated datasheets regarding frequency stability and temperature range variations. Ensure compliance with RoHS directives if applicable to the manufacturing region.

Selection Notes

Select this component when a 117.9648 MHz clock source is required in a minimal footprint. Consider the ±50ppm stability limit for timing-sensitive applications. Evaluate the 28mA maximum current draw against available power budgets. The 1.8V supply requirement necessitates compatible voltage regulation within the host circuit design.

Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series represents a transition from leaded to surface-mount technologies, expanding frequency ranges into the hundreds of megahertz. This specific part targets high-frequency applications requiring small form factors and low voltage operation.

Replacement Considerations

Direct substitutes include other 1.8V XO models from Mercury Electronics with identical 2.0x1.6mm footprints and 117.9648 MHz frequencies. Verify pinout compatibility and electrical parameters before integration.