18QHTF21-78.000-PD

Overview

The 18QHTF21-78.000-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind., Co., Ltd. It operates at a frequency of 78 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby (power down) feature for energy management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low voltage operation at 1.8V
• Integrates power down functionality for standby mode
• Utilizes LVCMOS output logic levels

Applications

• Battery-powered portable devices
• Systems requiring precise timing at low voltage
• Compact electronic circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB design constraints to avoid assembly issues.

Selection Notes

Select this component when a 78 MHz clock signal is required within space-constrained designs. The choice is driven by the need for low voltage compatibility and integrated power management features. Evaluate the thermal performance and stability characteristics relative to the operating environment conditions specified in the manufacturer documentation.

Part Context

This part belongs to the Mercury Electronics XO series, which focuses on quartz-based timing solutions. The manufacturer specializes in frequency control products including crystals and oscillators. This specific model represents a standard output configuration designed for general-purpose digital timing applications.

Replacement Considerations

Cross-reference with other 78 MHz LVCMOS oscillators in the 2.0x1.6mm package from compatible suppliers. Verify pinout compatibility and electrical parameter equivalence before substitution.