18QHTF21-10.4858-PD

Overview

The 18QHTF21-10.4858-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 10.4858 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby power-down mode. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise timing signals in low-power environments.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby power-down functionality to reduce consumption
• Utilizes a small form factor SMD package for space-constrained designs

Applications

• Battery-powered portable devices
• Low-power consumer electronics
• Digital signal processing systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail is stable and within the specified operating range to maintain oscillator performance. Confirm that the PCB footprint matches the 4-SMD No Lead package dimensions provided in the official datasheet to avoid assembly issues.

Selection Notes

Select this model when a 10.4858 MHz clock source is required with low voltage operation. Consider the LVCMOS output level compatibility with downstream logic families. Evaluate the thermal characteristics and operating temperature range to ensure reliability under expected environmental conditions. Compare power consumption metrics if multiple oscillators are used in the system.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and supply voltages, catering to different timing needs. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from standard continuous-operation variants within the same package family.

Replacement Considerations

Direct substitutes must match the 10.4858 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and electrical specifications such as phase noise and jitter before swapping components.