18QHTF21-6.16791-PD

Overview

The 18QHTF21-6.16791-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a nominal frequency of 6.16791 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a power-down function, allowing for standby mode to reduce consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes power-down capability for energy-efficient standby operation
• Designed for low-voltage 1.8V supply systems

Applications

• Battery-powered portable electronic devices
• Low-power consumer electronics
• Digital signal processing circuits requiring precise timing

Procurement Notes

Verify the exact part number suffix against official Mercury Electronic documentation to ensure correct frequency and package specifications. Confirm that the 1.8V supply requirement aligns with your system design. Check for RoHS compliance status if required by your manufacturing standards. Ensure the 4-SMD no-lead package matches your PCB footprint requirements before ordering.

Selection Notes

Select this component when a low-profile, low-voltage oscillator is required for space-constrained designs. The 1.8V operating voltage makes it suitable for modern mobile and handheld devices. Consider the LVCMOS output level compatibility with your target logic family. The power-down feature adds value for applications requiring extended battery life through active management of power states.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic, which specializes in quartz-based frequency control products. The company has decades of experience in Taiwan's crystal industry. This specific model represents a standard XO variant optimized for low voltage and small form factor applications, distinct from their TCXO or VCTCXO lines.

Replacement Considerations

Direct substitutes may include other 1.8V LVCMOS oscillators in 2.0x1.6mm packages from manufacturers like Epson or NDK. Verify frequency tolerance and load capacitance requirements when cross-referencing. Ensure the replacement supports the same power-down functionality if power management is critical.