18QHTF21-6.4512-OE

Overview

The 18QHTF21-6.4512-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 6.4512 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with physical dimensions of 2.0mm x 1.6mm. The component is RoHS compliant and features MSL 1 moisture sensitivity rating.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Includes hardware enable/disable pin for active power state control
• Utilizes lead-free SMD packaging for surface mount assembly

Applications

• General clock signal generation for embedded systems
• Timing reference for low-voltage digital circuits
• Consumer electronics requiring compact oscillators

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the enable/disable pin logic levels are compatible with the controlling microcontroller or FPGA to prevent unintended shutdown states during operation.

Selection Notes

Select this model when a precise 6.4512 MHz timing source is required for 1.8V logic families. The small 2.0x1.6mm footprint makes it suitable for space-constrained designs. Consider the enable feature if power efficiency is critical. Verify that the standard XO performance meets the jitter and stability specifications of the application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a manufacturer specializing in quartz crystal components since 1973. The series offers various frequencies within a standardized 4-SMD no-lead package. This specific variant provides a 6.4512 MHz output, distinguishing it from other models like the 21.1184 MHz or 50.191333 MHz variants in the same family.

Replacement Considerations

Direct substitutes include the 18QHTF21-6.4512-PD variant from the same manufacturer, which shares identical electrical characteristics and package dimensions. Cross-brand replacements require matching the 6.4512 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead form factor.