18QHTF21-1.1387-OE

Overview

The 18QHTF21-1.1387-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 1.1387 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features an active-low enable/disable control pin for power management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• LVCMOS output interface for digital compatibility
• Active-low enable/disable functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation in embedded systems
• Timing reference for low-frequency digital circuits
• Portable electronic devices requiring small form factor oscillators

Procurement Notes

Verify the specific suffix 'OE' corresponds to the enable/disable feature when sourcing replacements. Confirm that the 1.8V supply voltage aligns with the target system's power rails. Ensure the 4-SMD no-lead footprint matches the PCB layout, as mechanical dimensions are critical for this component type.

Selection Notes

Select this component when a precise 1.1387 MHz timing source is required with minimal board space. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the enable pin requirement if power conservation or clock gating is necessary for the application design.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series includes various frequencies and packages, but this specific model is defined by its 1.1387 MHz frequency and 1.8V operation. Mercury has been a supplier of such components since 1973.

Replacement Considerations

Direct substitutes must match the 1.1387 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm 4-SMD package. Verify that any alternative part also supports the active-low enable function to maintain circuit functionality.