18QHTF21-59.9749-PD

Overview

The 18QHTF21-59.9749-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 59.9749 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for precise timing applications requiring low power consumption and small form factor integration.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Compact 4-SMD no lead surface mount package

Applications

• General purpose clock generation
• Digital signal processing timing
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to prevent assembly issues. Cross-reference the datasheet for operating temperature range specifications to guarantee reliability under intended environmental conditions.

Selection Notes

Select this model when a 59.9749 MHz reference is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint for power budgeting. Evaluate the need for power-down capabilities if dynamic power management is critical. Compare package size constraints against available board space. Verify that the standard XO performance meets jitter and stability requirements for the specific application.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface mount oscillators. The series typically offers various frequencies within the 2.0x1.6mm package. Mercury Electronics specializes in quartz-based frequency control products, including crystals and oscillators, serving global electronics markets with timing solutions since 1973.

Replacement Considerations

Direct substitutes must match the 59.9749 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD 2.0x1.6mm package. Check pinout compatibility and electrical characteristics such as current consumption and startup time. Verify thermal and mechanical specifications for equivalent performance.