18QHTF21-49.4733-PD

Overview

The 18QHTF21-49.4733-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 49.4733 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and includes a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. This component is designed for precise timing applications requiring low power consumption and small form factor integration.

Feature Summary

• LVCMOS output interface for digital circuit compatibility
• Integrated standby mode for power reduction
• Compact 4-SMD no-lead surface mount package

Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Consumer electronics requiring low-power oscillators

Procurement Notes

Verify the specific frequency suffix matches the required system clock speed. Confirm the 1.8V supply voltage aligns with target board design. Ensure the 4-SMD package footprint fits the PCB layout constraints. Check for RoHS compliance if required by project specifications. Validate manufacturer authenticity through authorized channels to avoid counterfeit components.

Selection Notes

Select this part when a 49.4733 MHz clock signal is strictly required. The 1.8V operating voltage dictates compatibility with low-voltage logic families. The small 2.0x1.6mm package is suitable for space-constrained designs. Consider the LVCMOS output swing for noise margin requirements. Evaluate the standby feature necessity for battery-operated applications.

Part Context

This oscillator belongs to Mercury's 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies within a standardized small outline package. Mercury Electronics specializes in quartz-based timing solutions including crystals, filters, and oscillators. The company has established itself as a supplier in the frequency control industry since 1973.

Replacement Considerations

Direct substitutes must match the 49.4733 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility before substitution. Cross-reference with other manufacturers offering identical electrical and mechanical specifications.