18QHTF21-42.543-PD

Oscillators Overview

The 18QHTF21-42.543-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 42.543 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports Standby (Power Down) mode for reduced power consumption
• Utilizes LVCMOS output logic for digital interface compatibility
• Designed in a small form factor 4-SMD No Lead package

Oscillators Applications

• Portable electronic devices requiring low power timing
• Communication systems utilizing standard clock signals
• Embedded systems needing precise frequency references

Oscillators Procurement Notes

Verify the specific ordering suffix to ensure the correct frequency and package variant matches the design requirements. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the LVCMOS output compatibility is suitable for the connected logic inputs. Check for any specific handling instructions related to the surface-mount package type during assembly.

Oscillators Selection Notes

Select this component when a 42.543 MHz reference is required in a minimal footprint. The 1.8V operating voltage makes it suitable for modern low-voltage digital circuits. The inclusion of a standby feature allows for energy efficiency in battery-operated applications. Consider the 2.0x1.6mm size constraint against available PCB space.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The manufacturer is a Taiwan-based supplier established since 1973, focusing on frequency control products including TCXOs and VCTCXOs. This series represents their standard XO offerings in compact SMD packages.

Oscillators Replacement Considerations

Direct substitutes may include other 42.543 MHz LVCMOS oscillators in 2.0x1.6mm packages from different manufacturers, provided pinout and electrical specifications match exactly.