18QHTF21-48.9143-PD

Overview

The 18QHTF21-48.9143-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 48.9143 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down control feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby or power-down functionality to reduce power consumption
• Utilizes a small form factor 4-SMD no-lead package

Applications

• Low-voltage digital circuit timing
• Portable electronic devices requiring power efficiency
• Communication modules utilizing standard clock interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply voltage aligns with the host board's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure joint integrity during assembly processes.

Selection Notes

Select this component when a 48.9143 MHz clock signal is required in space-constrained designs. The choice is driven by the need for low voltage operation at 1.8V and the inclusion of a power-down pin for battery-powered applications. Consider the LVCMOS interface compatibility with the receiving logic gates. Evaluate the thermal performance and operating temperature range suitability for the intended environmental conditions.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series offers various standard frequencies packaged in miniature SMD formats. Mercury Electronics has been a supplier of crystals and oscillators since 1973, focusing on precision timing solutions for global electronics markets. This specific model represents a standard XO variant within their portfolio.

Replacement Considerations

Direct substitutes must match the 48.9143 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and stability if available in public datasheets.