18QHTF21-38.400-PD

Oscillators Overview

The 18QHTF21-38.400-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 38.4 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and a standby mode for power-down functionality. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. This component serves as a precise clock source for digital circuits requiring stable timing signals.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital systems
• Includes standby mode capability to reduce power consumption during idle periods
• Utilizes a lead-free surface-mount package for automated assembly compatibility

Oscillators Applications

• Clock generation for microprocessors and microcontrollers
• Timing reference for communication interfaces
• Synchronization sources in portable electronic devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure that the 1.8V supply voltage aligns with the system's power rails. Confirm that the 4-SMD no-lead package footprint matches the PCB layout specifications to prevent soldering issues during assembly.

Oscillators Selection Notes

Select this oscillator when a low-voltage, small-form-factor clock source is required for LVCMOS-compatible logic families. Consider the standby feature if power management is critical for the application. Evaluate the operating temperature range to ensure reliability under expected environmental conditions compared to alternative packages or voltage levels.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal and oscillator products. The manufacturer has a history dating back to 1973, focusing on frequency control components. The 'PD' suffix typically indicates the inclusion of a power-down or standby function within the oscillator module.

Oscillators Replacement Considerations

Direct replacements must match the 38.4 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package size. Verify pinout compatibility and electrical characteristics such as jitter and phase noise if specified in the original design constraints.