18QHTF21-1.1388-PD

Overview

The 18QHTF21-1.1388-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 1.1388 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down capability via a standby control input. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode for power management
• Provides LVCMOS signal output

Applications

• Low-power embedded systems requiring precise timing
• Portable electronic devices with strict size constraints
• Clock generation for microcontrollers operating at 1.8V

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to guarantee proper soldering and electrical connection.

Selection Notes

Select this component when a small form factor is required alongside low power consumption. The integrated power-down feature makes it suitable for battery-operated applications where energy efficiency is critical. Ensure the system clock requirement aligns exactly with the 1.1388 MHz frequency, as this is a fixed-frequency oscillator without programmable options.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies while maintaining a consistent 2.0x1.6mm footprint and 1.8V operating voltage. The 'PD' suffix indicates the inclusion of a power-down pin, distinguishing it from standard continuous-operation variants within the same family.

Replacement Considerations

Direct replacements must match the 1.1388 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pin compatibility and thermal characteristics if substituting with other manufacturers' components offering similar specifications.