18QHTF21-42.400-PD

Oscillators Overview

The 18QHTF21-42.400-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 42.4 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Integrates LVCMOS output interface for digital circuit compatibility
• Supports low-voltage operation at 1.8V supply
• Includes standby mode capability for power reduction

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific ordering suffix matches the required frequency and voltage specifications. Confirm that the 4-SMD no-lead package aligns with the target PCB footprint. Ensure the LVCMOS output type is compatible with the receiving logic inputs. Check for any specific reflow soldering profile requirements provided in the official datasheet to ensure assembly reliability.

Oscillators Selection Notes

Select this component when a precise 42.4 MHz timing source is required within space-constrained designs. The 1.8V supply requirement makes it suitable for modern low-power applications. Consider the LVCMOS output swing when interfacing with downstream logic families. The integrated standby feature offers an advantage for battery-operated equipment requiring extended operational life.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor surface-mount oscillators. The series typically offers various frequencies and voltage options within the same physical footprint. Mercury Electronics is a specialized manufacturer of quartz-based frequency control products, including crystals, oscillators, and filters, with a long history in the industry.

Oscillators Replacement Considerations

Direct substitutes must match the 42.4 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Other manufacturers producing similar SMD oscillators may require pinout and electrical parameter verification. Ensure thermal and mechanical compatibility before substitution.