18QHTF21-39.800-PD

Oscillators Overview

The 18QHTF21-39.800-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 39.8 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise clock signals in space-constrained electronic designs.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V for efficient power usage
• Includes standby and power-down functionality for energy management
• Utilizes LVCMOS output logic for digital interface compatibility
• Features a compact surface-mount package for PCB integration

Oscillators Applications

• General-purpose clock signal generation
• Embedded systems requiring precise timing
• Portable electronics with space constraints
• Digital communication interfaces

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply voltage aligns with your power architecture. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check the operating temperature range specifications to ensure reliability under your environmental conditions. Validate the package footprint against your PCB layout guidelines.

Oscillators Selection Notes

Select this model when a 39.8 MHz clock source is required with low power consumption capabilities. Consider the 1.8V supply constraint and LVCMOS output compatibility with your target circuitry. Evaluate the need for standby functionality to meet power budget requirements. Assess the physical size limitations of the 2.0x1.6mm package against available board space. Compare performance metrics such as phase noise if applicable to your application needs.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies within a compact form factor. These oscillators are designed for general clocking applications in consumer and industrial electronics. The manufacturer provides multiple variants with different frequencies and supply voltages. The PD suffix indicates the inclusion of power-down capability.

Oscillators Replacement Considerations

Direct substitutes may include other 39.8 MHz LVCMOS oscillators in a 4-SMD no-lead package with 1.8V operation. Verify pinout compatibility and electrical parameters such as current consumption and output swing. Ensure the replacement supports the same standby functionality if required. Check dimensional tolerances to fit the existing footprint.