18QHTF21-79.94464-PD

Overview

The 18QHTF21-79.94464-PD is a 79.94464 MHz crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a supply voltage of 1.8V and utilizes an LVCMOS output interface. The component features a Standby (Power Down) function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Provides stable 79.94464 MHz timing signals via LVCMOS output
• Supports low-power operation through standby mode control
• Designed for space-constrained applications with a 2.0x1.6mm surface-mount footprint

Applications

• Digital signal processing systems requiring precise clock sources
• Communication equipment utilizing standard frequency references
• Embedded systems with limited board space constraints

Procurement Notes

Verify the specific suffix 'PD' indicates the Standby (Power Down) functionality as documented in official Mercury datasheets. Confirm that the 1.8V supply requirement aligns with your system's voltage rails. Ensure the 4-SMD no-lead package type matches your PCB assembly capabilities and soldering profiles. Cross-reference the exact frequency tolerance specifications from the manufacturer's latest documentation before finalizing procurement.

Selection Notes

Select this component when a 79.94464 MHz reference is required within a 2.0x1.6mm form factor. The 1.8V operating voltage suits low-power digital logic families. The LVCMOS interface ensures compatibility with standard microcontroller and FPGA inputs. Consider the standby feature if power efficiency during idle states is a design priority.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized small outline package. These components are designed for general-purpose timing applications where size and power consumption are critical factors.

Replacement Considerations

Direct substitutes must match the 79.94464 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as load current and enable logic levels before substitution.