18QHTF21-66.66667-PD

Overview

The 18QHTF21-66.66667-PD is a crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 66.66667 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V 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 surface-mount technology for automated assembly

Applications

• General clock signal generation in embedded systems
• Timing reference for digital logic circuits
• Data communication interfaces requiring precise frequency stability

Procurement Notes

Verify the specific 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 4-SMD no-lead package footprint matches your PCB layout constraints to avoid mechanical interference or soldering issues during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The small 2.0x1.6 mm form factor makes it suitable for space-constrained designs. Consider the standby feature if power efficiency is a priority. Validate that the 66.66667 MHz frequency meets the exact timing needs of the target application without requiring external dividers.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry. This series typically offers various frequencies within a standardized small outline package, providing reliable timing solutions for consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 66.66667 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pin compatibility and electrical characteristics such as phase noise and jitter specifications to ensure functional equivalence in the existing circuit design.