18QHTF21-12.09375-PD

Overview

The 18QHTF21-12.09375-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.09375 MHz and utilizes LVCMOS output logic levels. The device is designed for low voltage applications, functioning at a supply voltage of 1.8V. It features a power-down capability to reduce consumption when not in use. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly.

Feature Summary

• Supports standby mode via power-down function
• Utilizes LVCMOS output interface
• Designed for low voltage 1.8V operation

Applications

• Timing and clock generation in electronic devices
• General purpose timing circuits
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a precise 12.09375 MHz clock signal is required in space-constrained designs. The choice is driven by the need for low voltage compatibility and integrated power management features. Consider the small form factor for high-density board layouts. Evaluate the LVCMOS output compatibility with downstream digital logic families to ensure signal integrity without additional level shifting.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0x1.6 mm package. These components are typically used where size and power efficiency are critical. The manufacturer specializes in frequency control products, providing consistent quality across their XO lineup.

Replacement Considerations

Direct substitutes include other 12.09375 MHz XOs in 4-SMD packages with 1.8V LVCMOS outputs. Verify pinout compatibility and electrical specifications such as phase noise and jitter if replacing with different brands. Ensure the replacement supports the same power-down functionality if standby current reduction is required.