18QHTF21-7.9872-PD

Overview

The 18QHTF21-7.9872-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.9872 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 2.5V and includes a standby (power down) function to manage power consumption. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 2.5V
• Integrates standby mode for power management
• Provides LVCMOS signal output

Applications

• General clock generation in embedded systems
• Timing reference for digital circuits
• Consumer electronics timing modules

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 2.5V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 7.9872 MHz timing source is required for low-power applications. The choice is driven by the need for LVCMOS compatibility and a small form factor. Consider the operating temperature range and voltage stability needs relative to other available frequencies in the series to ensure optimal system performance.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic, which specializes in quartz frequency control products. The manufacturer has produced timing components since 1973, offering various oscillators including TCXO and VCTCXO types. This specific model represents a standard XO variant within their portfolio of surface-mount devices.