18QHTF21-1.2288-OE

Overview

The 18QHTF21-1.2288-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 1.2288 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage range of 1.8V. It includes an enable/disable control function to manage power consumption when the signal is not required. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated enable/disable pin for power management
• Compact 4-SMD no-lead surface mount package

Applications

• Low-speed clock generation for microcontrollers
• Real-time clock circuits requiring precise timing
• Embedded systems with strict power constraints

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Ensure that the 1.8V supply voltage aligns with your target platform's I/O standards. Confirm that the enable/disable functionality is utilized correctly in your schematic to optimize power efficiency. Check for any specific handling instructions related to the small form factor package during assembly.

Selection Notes

Select this component when a stable 1.2288 MHz reference is needed for low-voltage digital logic. Consider the enable feature if power saving is critical during idle states. Compare package size constraints against available board space. Evaluate the LVCMOS swing against downstream input thresholds to ensure reliable signal transmission without additional level shifting.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-footprint timing solutions. The manufacturer specializes in quartz-based frequency control products, including crystals and oscillators. This series is engineered for consumer electronics and portable devices where space and power are limited. The OE suffix typically denotes the presence of an enable pin, differentiating it from standard continuous-output variants.

Replacement Considerations

Direct replacements must match the 1.2288 MHz frequency, 1.8V supply, and LVCMOS output type. Verify that substitute components offer compatible pinout configurations for the 4-SMD no-lead package. Ensure the replacement part supports the same enable/disable control mechanism if power management is required in the design.