18QHTF21-6.9993-PD

Overview

The 18QHTF21-6.9993-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 6.9993 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down mode to conserve energy. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications. The component supports an operating temperature range typical for commercial grade devices, ensuring reliable performance in various electronic circuits requiring precise clock signals.

Feature Summary

• Supports low-voltage operation with 1.8V supply
• Includes standby power-down functionality
• Utilizes LVCMOS output logic for digital compatibility
• Compact 4-SMD no-lead surface mount package

Applications

• Battery-powered portable devices
• Digital signal processing systems
• Communication equipment requiring precise timing

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check the operating temperature range specifications to ensure suitability for your environmental conditions. Validate the 4-SMD package dimensions against your PCB footprint constraints.

Selection Notes

Select this component when a stable 6.9993 MHz clock source is required for low-power applications. Consider the 1.8V supply constraint and LVCMOS interface compatibility with your microcontroller or FPGA. Evaluate the need for standby mode support to extend battery life in portable designs. Compare the 4-SMD package size against available board space. Assess the manufacturer's reliability history for critical timing applications.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronic Ind. Co., Ltd. The series offers various frequencies and voltage options. Mercury Electronics is a established manufacturer of frequency control products. The 'PD' suffix typically indicates a specific packaging or tape-and-reel configuration. This series is designed for general-purpose clocking needs in consumer and industrial electronics.

Replacement Considerations

Direct replacements must match the 6.9993 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility if substituting with different manufacturers. Ensure equivalent frequency stability and phase noise specifications. Check if alternative parts offer similar standby current characteristics. Confirm that any substitute meets the same operating temperature range requirements.