18QHTF21-28.631-PD

Oscillators Overview

The 18QHTF21-28.631-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 28.631 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a standby power-down function to reduce consumption. It is housed in a compact 4-SMD, no-lead package with dimensions of 0.079 inches in length and 0.063 inches in width. The component supports surface mount mounting types and exhibits a maximum supply current of 23mA.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes standby mode capability for power reduction
• Designed for surface mount assembly in small form factor packages

Oscillators Applications

• General purpose clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices requiring low voltage operation

Oscillators Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before procurement. Confirm that the 1.8V supply requirement aligns with the target system design. Ensure the 4-SMD no-lead package footprint matches the PCB layout constraints. Check for any specific ordering suffixes or packaging variations that may affect availability or handling requirements.

Oscillators Selection Notes

Select this component when a precise 28.631 MHz timing source is required within a low-power constraint. The 1.8V supply voltage makes it suitable for modern low-voltage digital circuits. Consider the ±50ppm frequency stability if tight timing accuracy is necessary. The compact 2.0x1.6 mm size is ideal for space-constrained designs where surface mount technology is preferred over through-hole alternatives.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic Ind. Co., Ltd. The manufacturer specializes in quartz crystals and timing solutions. This series typically offers various frequency options within a standardized small outline package format. The -PD suffix likely indicates a specific tape-and-reel packaging configuration for automated assembly processes.

Oscillators Replacement Considerations

Direct replacements must match the 28.631 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify equivalent frequency stability and operating temperature ranges. Cross-reference pinout configurations to ensure compatibility without circuit modification.