18QHTF21-3.579545-PD

Oscillators Overview

The 18QHTF21-3.579545-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 3.579545 MHz with an LVCMOS output interface. The device functions on a 1.8V supply voltage and supports standby mode via enable/disable functionality. Key electrical specifications include a maximum supply current of 21mA and a frequency stability of ±50ppm. The operating temperature range spans from -40°C to +85°C. The component utilizes a surface mount package, specifically a 4-SMD, No Lead configuration.

Oscillators Feature Summary

• Supports Enable/Disable functionality for power management
• Utilizes LVCMOS output interface for digital logic compatibility
• Operates on a low voltage 1.8V supply rail

Oscillators Applications

• General purpose clock signal generation in embedded systems
• Timing reference for microcontrollers requiring 3.579545 MHz input
• Consumer electronics utilizing standard crystal oscillator interfaces

Oscillators Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct voltage and package variants. Confirm that the PD suffix aligns with the required 4-SMD no lead footprint. Cross-reference the frequency tolerance requirements with the ±50ppm specification to ensure system timing accuracy meets design constraints before finalizing procurement orders.

Oscillators Selection Notes

Select this component when a precise 3.579545 MHz clock source is required for low-power applications. The 1.8V operation makes it suitable for modern portable devices. Ensure the host circuit supports LVCMOS logic levels. The wide temperature range allows deployment in industrial or automotive environments where thermal stability is critical for maintaining frequency accuracy within specified limits.

Oscillators Part Context

This part belongs to the 18QHTF series of surface mount oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options. The 18QHTF21 variant specifically denotes the 1.8V supply version. This model represents a standard XO solution rather than a TCXO or VCXO, providing fixed frequency output without external tuning capabilities.

Oscillators Replacement Considerations

Direct substitutes must match the 3.579545 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no lead package. Verify pinout compatibility and thermal characteristics. Check if alternative manufacturers offer equivalent ±50ppm stability within the same temperature range.