18QHTF21-1.23456-PD

Overview

The 18QHTF21-1.23456-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 1.23456 MHz with an LVCMOS output logic level. 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 with dimensions of 2.0x1.6 mm. The component is designed for timing applications requiring precise clock signals within specified operating temperature ranges.

Feature Summary

• LVCMOS output interface for digital circuit compatibility
• Integrated standby mode for power reduction
• Compact surface-mount package design

Applications

• General digital timing circuits
• Embedded system clock sources
• Consumer electronics timing references

Procurement Notes

Verify the specific suffix (PD) against official datasheets to confirm the presence of the power-down feature. Ensure the 1.8V supply requirement aligns with target system voltages. Confirm package footprint compatibility during PCB layout. Check manufacturer documentation for exact operating temperature limits and load capacitance requirements before final integration.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a specific sub-MHz frequency. The LVCMOS output suits standard digital logic families. Consider the small 2.0x1.6 mm footprint for space-constrained designs. Verify that the standby feature meets power management goals compared to continuous-operation alternatives.

Part Context

This part belongs to the 18QHTF21 series of quartz crystal oscillators from Mercury Electronics. The series typically offers various frequencies and output types. The 'PD' suffix indicates a specific variant, likely denoting the power-down capability. This model represents a specialized timing solution within the broader oscillator product line.

Replacement Considerations

Direct substitutes must match the 1.23456 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar low-profile oscillators if Mercury stock is unavailable.