18QHTF21-11.28846-PD

Overview

The 18QHTF21-11.28846-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 11.28846 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby function for power down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby capability to reduce power consumption during idle states
• Utilizes a small form factor surface-mount package for space-constrained designs

Applications

• Clock signal generation for embedded systems
• Timing reference for communication interfaces
• Power management circuits requiring precise timing

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions of 2.0x1.6mm. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The small 2.0x1.6mm package makes it suitable for dense layouts. Consider the standby feature if power efficiency is critical. Verify that the 11.28846 MHz frequency meets the exact timing needs of the target application without requiring additional frequency multiplication or division stages.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 1.8V LVCMOS format. The series is designed for applications needing reliable clock sources in minimal space. The 'PD' suffix typically indicates the presence of a power-down pin or functionality, distinguishing it from non-standby variants in the same physical package family.

Replacement Considerations

Direct replacements must match the 11.28846 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and stability. Cross-reference with other manufacturers offering similar ultra-small oscillators with standby capabilities.