18QHTF21-12.1895-PD

Overview

The 18QHTF21-12.1895-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 12.1895 MHz and utilizes an LVCMOS output signal format. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. 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
• Includes standby and power-down functionality
• Provides LVCMOS output signal compatibility

Applications

• General electronic timing circuits
• Embedded systems requiring precise clock signals
• Portable devices utilizing low-power oscillators

Procurement Notes

Verify the specific ordering suffix to ensure the correct tape-and-reel packaging configuration matches your assembly requirements. Confirm that the 1.8V supply voltage aligns with your system design before procurement. Ensure the 4-SMD no-lead package footprint corresponds exactly with your PCB layout specifications to avoid mounting issues.

Selection Notes

Select this component when a stable 12.1895 MHz reference is required for digital logic interfacing. The LVCMOS interface ensures compatibility with standard CMOS-based microcontrollers and processors. Consider the small 2.0x1.6 mm form factor for space-constrained designs where low power consumption via the standby feature is critical.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies within a standardized 4-pin SMD package. This specific model provides a non-standard frequency optimized for specific communication or data transfer protocols requiring exact timing synchronization.

Replacement Considerations

Direct replacements must match the 12.1895 MHz frequency, 1.8V operating voltage, LVCMOS output type, and 4-SMD 2.0x1.6mm package dimensions. Verify pinout compatibility and electrical characteristics such as load capacitance and drive strength before substituting.