18QHTF21-18.1818-PD

Oscillators Overview

The 18QHTF21-18.1818-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 18.1818 MHz with an LVCMOS output signal. The device supports a supply voltage of 1.8V and features a standby function for power down control. It utilizes a 4-SMD, no lead package with dimensions of 2.0x1.6mm. Maximum supply current is specified at 22 mA, and frequency stability is rated at 50 ppm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode for power management
• Compact surface-mount package design

Oscillators Applications

• General-purpose digital clock generation
• Embedded system timing references
• Communication interface synchronization

Oscillators Procurement Notes

Verify the specific ordering suffix and package variant against official Mercury Electronics documentation to ensure compatibility with target circuit requirements. Confirm that the 1.8V supply rail aligns with system voltage levels before integration. Cross-reference the 4-SMD footprint dimensions with PCB layout specifications to prevent mechanical interference.

Oscillators Selection Notes

Select this component when a precise 18.1818 MHz reference is required in space-constrained designs. The LVCMOS interface ensures compatibility with standard logic families. Consider the 50 ppm stability rating for applications tolerant to moderate environmental variations. Ensure the 22 mA maximum current draw fits within the available power budget.

Oscillators Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a standardized 2.0x1.6mm footprint. The -PD suffix typically indicates specific packaging or testing configurations defined by the manufacturer.

Oscillators Replacement Considerations

Direct substitutes must match the 18.1818 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as current consumption and stability before substitution.