18QHTF21-49.3767-PD

Overview

The 18QHTF21-49.3767-PD is a standard frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.3767 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and features a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. The component is designed for reliable timing applications within specified operating temperature ranges.

Feature Summary

• Provides stable 49.3767 MHz clock signals via LVCMOS interface
• Supports low-voltage 1.8V operation with standby power-down capability
• Utilizes a compact surface-mount package for space-constrained designs

Applications

• Digital signal processing systems requiring precise timing
• Communication equipment utilizing standard clock frequencies
• Embedded control units needing low-power oscillators

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to avoid assembly issues. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Choose this model when a 49.3767 MHz frequency is specifically required for data transmission or processing synchronization. The LVCMOS output is suitable for direct interfacing with digital logic circuits. Consider the 1.8V supply constraint and ensure compatibility with your voltage regulators. The small form factor makes it ideal for portable or high-density electronic devices where board space is limited.

Part Context

This component belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options in a standardized SMD package. These oscillators are part of Mercury's portfolio of frequency-control products, which includes quartz crystals, filters, and other timing solutions for industrial and consumer electronics markets.

Replacement Considerations

Direct substitutes must match the 49.3767 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical characteristics such as phase noise and stability. Cross-reference with other manufacturers offering similar SMD oscillators to ensure pinout and thermal compatibility.