18QHTF21-12.8888-PD

Overview

The 18QHTF21-12.8888-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 12.8888 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down (standby) control function to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient designs
• Includes standby mode capability via power-down control
• Provides stable LVCMOS signal output for digital interfaces

Applications

• Embedded systems requiring precise clock timing
• Portable electronic devices with space constraints
• Communication modules utilizing standard serial protocols

Procurement Notes

Verify the specific frequency suffix matches the required 12.8888 MHz specification. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package footprint fits the PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a small form factor is critical for the application. Consider the LVCMOS output compatibility with downstream logic levels. Evaluate the need for power-down functionality to manage system power budgets. Compare against other frequencies in the 18QHTF21 series if alternative timing standards are required.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within a consistent 2.0x1.6 mm package. It serves as a compact timing solution for modern electronics where size and power efficiency are prioritized over larger traditional oscillator packages.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical package and voltage but different frequencies, such as 18QHTF21-8.000-PD or 18QHTF21-51.200-PD, provided the frequency difference is acceptable for the system design.