18QHTF21-49.147085-PD

Overview

The 18QHTF21-49.147085-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.147085 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation at 1.8V for efficient power usage
• Includes standby mode capability for power management
• Utilizes LVCMOS output logic for digital interface compatibility
• Features a leadless SMD package for space-constrained designs

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital communication interfaces
• Power-sensitive embedded systems requiring standby modes
• Compact consumer electronics utilizing surface-mount technology

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 constraints. Check for any specific operating temperature range limitations if used in extreme environments. Always refer to the official datasheet for final electrical specifications.

Selection Notes

Select this component when a precise 49.147085 MHz clock source is required within a minimal footprint. Consider the 1.8V supply constraint and LVCMOS output compatibility with your target logic family. The standby feature makes it suitable for battery-operated devices where power conservation is critical. Evaluate the thermal performance and operating temperature range to ensure reliability under your specific application conditions.

Part Context

This part belongs to the QHTF series of high-frequency oscillators from Mercury Electronics. The series is known for providing stable clock signals in small form factors. The 'PD' suffix indicates the inclusion of a power-down or standby control pin, distinguishing it from continuous-operation variants. This specific model targets applications needing exact sub-50MHz frequencies with low power profiles.

Replacement Considerations

Direct substitutes must match the 49.147085 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify equivalent jitter and phase noise specifications if signal integrity is critical. Ensure the replacement also supports the standby functionality if power management is required. Cross-reference pinouts and electrical characteristics to guarantee functional compatibility.