18QHTF21-66.600-PD

Overview

The 18QHTF21-66.600-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 66.6 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0x1.6 mm. This component serves as a precise clock source for digital circuits requiring low-profile surface-mount integration.

Feature Summary

• Supports LVCMOS output logic levels for direct interface with digital loads
• Includes standby or power-down functionality to reduce current consumption
• Utilizes a 4-SMD no-lead package for compact surface-mount assembly

Applications

• General-purpose clock generation for embedded systems
• Timing reference for digital signal processing units
• Clock source for communication interfaces requiring 66.6 MHz stability

Procurement Notes

Verify the specific frequency suffix matches the required 66.6 MHz operation. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package footprint corresponds to the PCB layout requirements. Check datasheet specifications for operating temperature range compatibility with the intended environment.

Selection Notes

Select this component when a low-profile 2.0x1.6 mm oscillator is required for 1.8V logic systems. Consider the LVCMOS output type for compatibility with standard digital inputs. Evaluate the need for standby control if power management is critical. Compare package constraints against available board space and soldering capabilities.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies within a standardized small form factor. The 'PD' suffix typically indicates specific packaging or handling characteristics defined by the manufacturer. These oscillators are designed for applications demanding reliable timing in space-constrained electronic devices.

Replacement Considerations

Direct substitutes must match the 66.6 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics before substitution. Consult manufacturer cross-reference lists for verified equivalent parts.