18QHTF21-12.500-PD

Overview

The 18QHTF21-12.500-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.5 MHz with LVCMOS output logic and a supply voltage of 1.8V. The device features a Standby (Power Down) function and is housed in a compact 4-SMD, No Lead package.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output signaling for digital interfacing.
• Includes a dedicated Standby or Power Down mode to reduce power consumption when inactive.

Applications

• General-purpose clock signal generation for embedded systems
• Timing reference for low-voltage digital circuits
• Compact electronic devices requiring minimal footprint

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 PCB layout constraints. Cross-reference the datasheet for operating temperature ranges to guarantee reliability under your application's thermal conditions.

Selection Notes

Select this component when a precise 12.5 MHz timing source is required for low-power applications. The LVCMOS interface ensures compatibility with standard digital logic families. The integrated power-down feature makes it suitable for battery-operated or energy-efficient designs where standby current reduction is critical.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, typically utilizing small form-factor packages like 4-SMD to support space-constrained modern electronics designs.

Replacement Considerations

Direct substitutes must match the 12.5 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical specifications such as jitter and phase noise if strict timing performance is required.

FAQ

What is the output logic type of the 18QHTF21-12.500-PD?

The output logic type is LVCMOS (Low Voltage CMOS).

Does this oscillator support a power-saving mode?

Yes, the device includes a Standby (Power Down) function to minimize power usage when not in active operation.