18QHTF21-12.420-PD

Overview

The 18QHTF21-12.420-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.42 MHz with an LVCMOS output logic level. The device requires a 1.8V supply voltage 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.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output interface
• Includes standby mode capability for power reduction
• Utilizes a leadless surface-mount package design

Applications

• Battery-powered portable devices
• General purpose clock signal generation
• Digital circuit timing applications

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system's power rails. Ensure the 4-SMD no-lead footprint matches the PCB layout specifications to avoid assembly issues.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a small form factor. The LVCMOS output is suitable for standard digital logic families. Consider the standby feature if power efficiency during idle periods is a critical design constraint for the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature oscillators. The series typically offers various frequencies within a 2.0x1.6mm package. The 'PD' suffix indicates the inclusion of a power-down or standby control pin functionality.

Replacement Considerations

Direct substitutes must match the 12.42 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility for the standby function. Cross-reference with other manufacturers offering similar low-profile XO components.