18QHTF21-7.045-PD

Overview

The 18QHTF21-7.045-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 7.045 MHz. It utilizes LVCMOS output logic levels and functions with a supply voltage of 1.8V. The device supports a standby mode for power-down functionality. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation at 1.8V
• Features LVCMOS output interface
• Includes standby capability for power management

Applications

• General-purpose digital timing circuits
• Embedded systems requiring stable clock sources
• Consumer electronics with space constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a 7.045 MHz reference signal is required within a low-power environment. The LVCMOS output ensures compatibility with standard digital logic families. Consider the 1.8V operating voltage constraint and verify that the standby feature meets your power efficiency goals. The small form factor makes it suitable for dense board layouts where space is limited compared to larger through-hole alternatives.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic. The series typically offers various frequencies with standardized LVCMOS outputs and low-voltage operation. The 'PD' suffix likely indicates a specific packaging or tape-and-reel configuration, while the core function remains a standard XO providing a fixed frequency output for timing synchronization in electronic devices.

Replacement Considerations

Direct substitutes must match the 7.045 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter if critical. Consult manufacturer cross-reference lists for equivalent parts from other suppliers offering identical specifications.