18QHTF21-49.125-OE

Overview

The 18QHTF21-49.125-OE is a standard frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.125 MHz and utilizes LVCMOS output logic. The device is designed for surface mount installation in a compact 4-SMD, no lead package configuration. It functions within an operating temperature range of -40°C to 85°C and requires a supply voltage of 1.8V. Key electrical characteristics include a frequency stability of ±50 ppm and a maximum supply current of 23 mA. The component features enable and disable control capabilities.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable and disable functionality for power management
• Designed for surface mount technology (SMT) assembly

Applications

• General purpose timing circuits requiring precise clock signals
• Embedded systems utilizing low voltage CMOS interfaces
• Industrial equipment operating within extended temperature ranges

Procurement Notes

Verify the specific package dimensions and pinout configuration against the official datasheet prior to PCB layout finalization. Confirm that the design supports the required 1.8V supply rail and LVCMOS signal levels. Ensure thermal management strategies account for the specified operating temperature range of -40°C to 85°C during system integration.

Selection Notes

Select this component when a stable 49.125 MHz clock source is required with low voltage operation. Consider the 4-SMD no lead package for space-constrained designs. Evaluate the ±50 ppm stability requirement against system tolerance needs. Verify compatibility with LVCMOS drivers and ensure the enable/disable feature aligns with system power sequencing requirements.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface mount crystal oscillators. The series provides various frequencies and voltage options. The 18QHTF21-49.125-OE specifically addresses applications needing a 49.125 MHz output with 1.8V operation. It represents a standard solution for timing generation in modern electronic devices.

Replacement Considerations

Direct substitutes must match the 49.125 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check manufacturer cross-reference lists for equivalent parts from other suppliers ensuring identical pinout and electrical specifications.