18QHTF21-74.9291-PD

Overview

The 18QHTF21-74.9291-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 74.9291 MHz and utilizes LVCMOS output logic. 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 2.0x1.6 mm.

Feature Summary

• Generates precise timing signals using LVCMOS output logic
• Includes standby capability to reduce power consumption during idle states
• Designed for surface-mount integration via a leadless SMD package

Applications

• Digital signal processing clock sources
• Communication equipment timing references
• Embedded system clock generation

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 footprint matches your PCB layout constraints. Check for any specific operating temperature range limitations defined in the official datasheet to guarantee reliability under your environmental conditions.

Selection Notes

Select this component when a stable 74.9291 MHz reference is required for LVCMOS-compatible digital circuits. Consider the low profile and small footprint suitable for space-constrained designs. Evaluate the power-down feature if battery life or thermal management is critical. Ensure the manufacturing source is verified as Mercury Electronics Ind. Co. Ltd to maintain quality standards.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz crystals and oscillators, offering various packages and frequencies. This specific model represents a common configuration for general-purpose timing applications requiring moderate precision and low power operation.

Replacement Considerations

Direct substitutes must match the 74.9291 MHz frequency, LVCMOS output, 1.8V supply, and 2.0x1.6mm 4-SMD package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before swapping. Consult the manufacturer's cross-reference list for approved alternatives.