18QHTF21-1.77776-OE

Overview

The 18QHTF21-1.77776-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.77776 MHz and utilizes LVCMOS output logic levels. The device requires a 1.8V supply voltage and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output logic interface
• Integrated enable/disable control pin
• Low voltage 1.8V operation
• Surface-mount 4-SMD no-lead package

Applications

• Low-power embedded systems
• Consumer electronics timing circuits
• Portable device clock sources

Procurement Notes

Verify the specific frequency suffix matches the required 1.77776 MHz specification. Confirm the 1.8V supply requirement aligns with the target system design. Ensure the 4-SMD no-lead package footprint corresponds to the PCB layout. Check datasheet for operating temperature range compatibility.

Selection Notes

Select this component when a precise 1.77776 MHz reference is needed with low power consumption. The LVCMOS output is suitable for digital logic interfaces. The enable feature allows for dynamic power saving. Verify that the 1.8V supply voltage is available in the application environment.

Part Context

This part belongs to the Mercury Electronics XO series, which offers various frequencies in small SMD packages. The 18QHTF21 series typically provides standard oscillators with enable functionality. Mercury Electronics specializes in quartz frequency control products, offering components for diverse electronic applications.

Replacement Considerations

Direct substitutes must match the 1.77776 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify electrical parameters and pinout compatibility before substitution. Consult manufacturer cross-reference lists for approved alternatives.