18QHTF21-7.9959-OE

Overview

The 18QHTF21-7.9959-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 7.9959 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes hardware enable and disable control functionality
• Utilizes a compact surface-mount package design

Applications

• General clock signal generation in electronic circuits
• Timing reference for low-voltage digital systems
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the enable pin logic levels are compatible with the controlling microcontroller or FPGA to prevent unintended oscillator states during operation.

Selection Notes

Select this component when a precise 7.9959 MHz timing source is required for low-power applications. The choice is driven by the need for LVCMOS compatibility and the physical space constraints imposed by the small 2.0x1.6 mm footprint. Consider the enable feature if power management or standby modes are part of the system architecture.

Part Context

This oscillator belongs to the Mercury Electronic 18QHT series, which focuses on small-form-factor clock generators. The series typically offers various frequencies within a standard operating range, providing designers with flexible options for integrating precise timing into portable and space-constrained electronic devices without compromising performance.

Replacement Considerations

Direct substitutes include other 7.9959 MHz LVCMOS oscillators in similar SMD packages from different manufacturers, provided electrical parameters match. Cross-reference with models like 3QHTF32-7.9959-OE for alternative package sizes if pinout compatibility allows.