18QHTF21-1.200-PD

Overview

The 18QHTF21-1.200-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 1.2 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Standard XO oscillator with guaranteed frequency stability
• LVCMOS output interface compatible with digital logic circuits
• Integrated standby mode for power reduction

Applications

• General-purpose digital timing references
• Embedded systems requiring low-power clock sources
• Consumer electronics with space-constrained PCB layouts

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package dimensions fit within your board's mechanical constraints. Cross-reference the datasheet for operating temperature range specifications to guarantee reliability under your environmental conditions.

Selection Notes

Select this component when a stable 1.2 MHz clock signal is required with minimal power consumption. The LVCMOS output simplifies interfacing with microcontrollers and FPGAs without additional level shifting. The integrated power-down feature makes it suitable for battery-operated devices. Consider the 1.8V operation if your system does not support higher voltage oscillators.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, which offers various frequencies in small SMD packages. The series is designed for applications needing reliable quartz-based timing solutions. The 'PD' suffix indicates the inclusion of a power-down control pin, enhancing system efficiency compared to standard continuous-operation oscillators.

Replacement Considerations

Direct replacements must match the 1.2 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify that substitute parts offer comparable frequency stability and phase noise characteristics. Ensure the replacement also supports the power-down functionality if required by the design.