18QHTF21-88.888-PD

Overview

The 18QHTF21-88.888-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a nominal frequency of 88.888 MHz with a frequency stability of 50 ppm. The device utilizes LVCMOS output logic and requires a supply voltage of 1.8V. Maximum current consumption is specified as 26 mA. The component features a power-down standby function and is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Includes power-down standby functionality for energy management
• Utilizes a surface-mount crystal resonator base

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing standard frequency references
• Embedded systems with limited power budgets

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail can support the maximum current draw of 26 mA during active operation. Ensure the PCB footprint matches the 2.0 x 1.6 mm SMD no-lead package specifications to guarantee proper mechanical and electrical connection.

Selection Notes

Select this component when a fixed 88.888 MHz reference is required with strict size constraints. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the 50 ppm stability limit for applications sensitive to long-term drift. The power-down feature makes it suitable for battery-operated devices where standby current reduction is critical.

Part Context

This part belongs to the 18QHTF21 series of miniature oscillators from Mercury Electronics. The series typically offers various frequencies within a small form factor. The 'PD' suffix indicates the inclusion of a power-down control pin or function. These components are designed for high-volume consumer and industrial electronics requiring reliable timing sources.

Replacement Considerations

Direct substitutes must match the 88.888 MHz frequency, 1.8V supply, and 2.0x1.6mm package. Verify output logic compatibility and stability ratings. No other specific substitute part numbers are publicly confirmed for this exact configuration.