18QHTF21-1.155072-PD

Overview

The 18QHTF21-1.155072-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.155072 MHz with an LVCMOS output interface. The device supports a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The operational temperature range extends from -40°C to 85°C, ensuring reliability across various industrial environments.

Feature Summary

• Integrated standby and power-down functionality for reduced power consumption during idle states
• Compact 4-SMD no-lead surface mount package design suitable for space-constrained applications
• LVCMOS output signal compatibility for direct interfacing with digital logic circuits

Applications

• Data communication systems requiring precise timing references
• Industrial control equipment operating within wide temperature ranges
• Consumer electronics utilizing low-voltage digital interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 2.0x1.6mm footprint matches your PCB layout constraints. Check for any specific handling instructions related to the no-lead SMD package during assembly processes.

Selection Notes

Select this component when a low-frequency, low-voltage oscillator with power management capabilities is required. The 1.155072 MHz frequency is suitable for serial communication standards. Consider the 4-SMD package size if board real estate is limited. Verify that the LVCMOS output swing meets the input thresholds of the downstream components in your design chain.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a consistent small form factor. The 'PD' suffix indicates the inclusion of a power-down pin or feature. This model specifically targets applications needing stable timing at 1.8V with minimal current draw during non-active periods.

Replacement Considerations

Direct substitutes must match the 1.155072 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and stability. Ensure the replacement also includes the standby/power-down functionality. Cross-reference pinouts to guarantee compatibility with existing PCB traces.