18QHTF21-57.850-PD

Overview

The 18QHTF21-57.850-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 57.85 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down standby function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. The component is suitable for applications requiring precise clock signals in space-constrained electronic designs.

Feature Summary

• Supports low-voltage operation at 1.8V for energy-efficient systems
• Includes power-down capability to minimize current draw during idle periods
• Delivers stable LVCMOS output signals for digital circuit interfacing

Applications

• Portable consumer electronics requiring small form factors
• Communication modules needing precise timing references
• Embedded systems utilizing low-power microcontrollers

Procurement Notes

Verify the specific ordering suffix and frequency tolerance requirements against the official datasheet before procurement. Ensure that the 1.8V supply voltage aligns with the target system's power rails. Confirm the package type matches the PCB footprint design. Check for any RoHS compliance certifications if required by project specifications. Validate lead times and availability directly with authorized distributors.

Selection Notes

Select this component when a 57.85 MHz clock signal is required in a minimal footprint. Consider the 1.8V operating voltage constraint relative to other system voltages. Evaluate the need for power-down functionality versus continuous operation. Compare size constraints against alternative packages like larger SMD options. Assess thermal performance within the intended application environment.

Part Context

This oscillator belongs to Mercury Electronic's line of frequency control products, which includes crystals, TCXOs, and VCXOs. The company has decades of experience in quartz manufacturing. This specific model represents a standard XO solution focusing on miniaturization and low power consumption for modern portable devices.

Replacement Considerations

Direct substitutes must match the 57.85 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as load capacitance and drive strength before substitution.