18QHTF21-33.981-PD

Oscillators Overview

The 18QHTF21-33.981-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 33.981 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for timing applications requiring precise frequency generation within low-power electronic systems.

Oscillators Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic levels for digital interface compatibility
• Includes Standby (Power Down) functionality to reduce current consumption when inactive
• Utilizes a surface-mount 4-SMD, No Lead package for automated assembly integration

Oscillators Applications

• General purpose clock signal generation in embedded systems
• Timing reference sources for microcontrollers and processors
• Communication module synchronization circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target 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 2.0x1.6mm SMD package dimensions to prevent soldering defects. Check for any specific reflow soldering profile recommendations provided by the manufacturer to maintain component integrity during assembly.

Oscillators Selection Notes

Select this component when a fixed frequency of 33.981 MHz is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with standard digital logic families operating at 1.8V. Consider the small form factor for space-constrained designs. Verify that the operating temperature range meets the environmental conditions of the end application. Ensure the standby feature aligns with the system's power management strategy.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various standard frequencies with consistent electrical characteristics and packaging. The 'PD' suffix indicates the inclusion of a Power Down pin or function. These oscillators are part of Mercury's portfolio of quartz-based timing solutions, which includes crystals, filters, and other oscillator types for consumer and industrial electronics.

Oscillators Replacement Considerations

Direct replacements must match the 33.981 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Cross-reference with other manufacturers offering identical pinouts and electrical specifications. Verify that any substitute component supports the same Standby (Power Down) functionality. Ensure thermal and mechanical compatibility with the existing PCB layout.