18QHTF21-7.3738-PD

Overview

The 18QHTF21-7.3738-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 7.3738 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down mode to reduce energy consumption during inactive periods. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm, suitable for space-constrained surface-mount applications.

Feature Summary

• LVCMOS output logic interface
• 1.8V supply voltage operation
• Standby power-down capability
• Compact 4-SMD no-lead package

Applications

• General clock signal generation
• Embedded system timing references
• Consumer electronics circuit boards
• Industrial control modules

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before procurement. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Check for any specific RoHS compliance documentation if required for your region.

Selection Notes

Select this component when a precise 7.3738 MHz reference is needed with low power consumption. The LVCMOS output is compatible with standard digital logic families. Consider the 1.8V requirement for compatibility with modern low-voltage processors. The small form factor makes it ideal for dense board layouts where space is limited.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies and output types, all sharing the same compact 4-SMD package. The 'PD' suffix indicates the power-down feature, distinguishing it from models without standby capabilities.

Replacement Considerations

Direct replacements must match the 7.3738 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications to ensure seamless integration into existing designs.