18QHTF21-12.354-PD

Overview

The 18QHTF21-12.354-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 12.354 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function 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 power-down capability for energy efficiency
• Provides LVCMOS output signal compatibility

Applications

• General clock generation in embedded systems
• Timing reference for digital logic circuits
• Communication interface synchronization

Procurement Notes

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

Selection Notes

Select this component when a precise 12.354 MHz timing source is required for low-power applications. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is critical. Ensure the LVCMOS output level is compatible with the receiving logic inputs of your target microcontroller or FPGA without requiring additional level shifting.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various standard frequencies within a small form factor. The 'PD' suffix indicates the inclusion of a power-down pin, distinguishing it from continuous-operation variants. This family targets consumer electronics and portable devices requiring reliable timing with minimal space consumption.

Replacement Considerations

Direct replacements must match the 12.354 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify that substitute parts also include the power-down functionality if required by the design.