18QHTF21-10.235-OE

Overview

The 18QHTF21-10.235-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 10.235 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise clock source for digital circuits requiring low power consumption and small form factor integration.

Feature Summary

• Integrates LVCMOS output interface for direct logic compatibility
• Features active enable/disable pin for power management
• Utilizes surface-mount no-lead package for automated assembly

Applications

• Portable electronic devices requiring low voltage operation
• Embedded systems needing precise timing references
• Consumer electronics with space-constrained PCB layouts

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the datasheet specifications to maintain signal integrity. Confirm that the 4-SMD footprint matches your board layout exactly. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable joint formation during assembly processes.

Selection Notes

Select this component when a 10.235 MHz clock signal is required with minimal power consumption. The 1.8V operating voltage makes it suitable for modern low-voltage digital logic families. Consider the physical size constraints of the 2.0x1.6mm package when designing the PCB. Evaluate the need for an enable pin if power cycling or clock gating is part of the system architecture. Compare performance metrics against alternative oscillators only if specific jitter or phase noise requirements exceed standard specifications.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor solutions. The series typically offers various frequencies within a standardized package outline. Mercury Electronic Ind. Co. Ltd has established itself as a manufacturer of frequency control products, including quartz crystals and oscillators. The company emphasizes precision manufacturing techniques to ensure stable frequency generation across different environmental conditions.

Replacement Considerations

Direct replacements must match the 10.235 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and electrical characteristics such as current consumption and startup time. Cross-reference with other manufacturers offering similar footprints and specifications to ensure functional equivalence without redesigning the host circuit.