18QHTF21-65.653-PD

Overview

The 18QHTF21-65.653-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 65.653 MHz with LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby (power down) function. It is housed in a compact 4-SMD, No Lead package.

Feature Summary

• LVCMOS output logic for standard digital interfacing
• Integrated standby mode for power management
• Quartz-based frequency stability

Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB design guidelines to prevent assembly issues.

Selection Notes

Select this component when a precise 65.653 MHz clock source is required with low voltage operation. The LVCMOS interface suits standard CMOS logic families. Consider the standby feature if power efficiency during idle states is a priority. Verify thermal performance within the specified operating temperature range for the intended environment.

Part Context

This part belongs to the Mercury Electronics XO series, designed for surface-mount applications. The 'PD' suffix typically indicates the presence of a power-down or standby control pin, allowing for active power management. The 4-SMD package offers a small form factor suitable for dense PCB layouts.

Replacement Considerations

Direct substitutes must match the 65.653 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check manufacturer-specific pinouts for standby control functionality compatibility.