18QHTF21-49.38111-PD

Overview

The 18QHTF21-49.38111-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.38111 MHz with an LVCMOS output logic level. The device requires 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. This component is designed for timing applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

• Supports standby mode via power-down control signal
• Utilizes LVCMOS output interface for digital compatibility
• Encapsulated in a small form-factor surface-mount package

Applications

• General-purpose digital circuit timing
• Embedded system clock generation
• Communication interface synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Ensure that the 1.8V supply voltage aligns with the system power architecture. Confirm that the LVCMOS output swing is compatible with the receiving logic inputs. Check for any specific manufacturing date codes or lot traceability requirements mandated by quality standards.

Selection Notes

Select this component when a low-voltage, small-footprint oscillator is required for 49.38111 MHz applications. Consider the power-down feature if battery life or thermal management is critical. Evaluate the 4-SMD package suitability for automated assembly processes. Compare performance metrics such as phase noise and stability against other available options in the 18QHTF21 series to ensure compliance with system timing specifications.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a standardized 2.0x1.6mm package. The '-PD' suffix indicates the inclusion of a power-down pin functionality, distinguishing it from standard versions without this control feature. Mercury Electronics specializes in frequency control products, providing these components for industrial and consumer electronics markets.

Replacement Considerations

Direct replacements must match the 49.38111 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility, particularly the power-down control pin assignment. Cross-reference electrical parameters such as current consumption and startup time to ensure functional equivalence in the existing circuit design.