18QHTF21-40.230-PD

Oscillators Overview

The 18QHTF21-40.230-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 40.23 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 power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Oscillators Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic levels
• Includes Standby or Power Down functionality for energy management
• Utilizes a surface-mount 4-pin no-lead package design

Oscillators Applications

• General clock signal generation for digital circuits
• Embedded systems requiring low-voltage timing references
• Portable electronic devices utilizing power-down modes

Oscillators Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead footprint matches the PCB layout requirements. Check for any specific handling instructions regarding electrostatic discharge protection during assembly.

Oscillators Selection Notes

Select this component when a precise 40.23 MHz reference is required in space-constrained applications. The choice is driven by the need for low voltage operation at 1.8V and the inclusion of a power-down feature. Consider the small 2.0x1.6mm form factor for high-density board designs. Validate compatibility with LVCMOS interfaces used in the downstream logic components.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series includes various XO models with different frequencies and voltage options. Mercury Electronics has been manufacturing these components since 1973, establishing itself as a pioneer in the crystal industry. The 'PD' suffix typically indicates the presence of a power-down capability within the oscillator circuit.

Oscillators Replacement Considerations

Direct substitutes must match the 40.23 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other Mercury Electronics parts in the same series if available.