18QHTF21-12.888-PD

Overview

The 18QHTF21-12.888-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a standard frequency of 12.888 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a Standby (Power Down) control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output interface
• Includes standby mode for power reduction
• Utilizes quartz crystal technology for frequency stability

Applications

• General purpose clock signal generation
• Embedded system timing references
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 12.888 MHz clock source is required for digital circuits operating at 1.8V. The choice is driven by the need for a small form factor and the ability to disable the oscillator via a standby pin to conserve energy in battery-operated applications compared to non-disconnectable alternatives.

Part Context

This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series offers various frequencies and supply voltages, all sharing the same 2.0x1.6mm footprint. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from standard continuous-operation models within the same physical package family.

Replacement Considerations

Direct replacements must match the 12.888 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify if the substitute supports the standby function; otherwise, the control pin may require reconfiguration.