18QHTF21-74.945-PD

Overview

The 18QHTF21-74.945-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 74.945 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Features LVCMOS output logic compatibility
• Includes standby and power-down functionality

Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific frequency suffix matches the required 74.945 MHz specification. Confirm the 1.8V supply requirement aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint fits the PCB layout constraints. Check for any specific operating temperature range requirements if the application involves extreme environmental conditions.

Selection Notes

Select this component when a precise 74.945 MHz clock source is required for low-power applications. The 1.8V supply voltage makes it suitable for modern digital logic families. The small 2.0x1.6 mm package is ideal for space-constrained designs. Consider the standby feature if power efficiency during idle periods is a priority for the system architecture.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series typically offers various frequencies within a standardized small outline package format. Mercury Electronics has a long history in manufacturing crystals and oscillators, providing reliable timing solutions for electronic industries.

Replacement Considerations

Direct substitutes may include other 74.945 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package from different manufacturers. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with similar Mercury models like 18QHTF21 variants for potential drop-in replacements.