18QHTF21-19.444-OE

Oscillators Overview

The 18QHTF21-19.444-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 19.44 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6 mm. This component is part of the QHTF series, which offers various hermetic ceramic leadless SMD packages and frequencies ranging from 1.0 MHz to 200 MHz.

Oscillators Feature Summary

• LVCMOS output interface for digital signal compatibility
• Integrated enable/disable pin for power control
• Compact 4-SMD no-lead surface mount package
• Hermetic ceramic construction for reliability

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for microprocessors and microcontrollers
• Communication equipment requiring stable frequency sources
• Consumer electronics with space-constrained designs

Oscillators Procurement Notes

Verify the specific ordering suffix matches the required frequency and package variant. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the LVCMOS output type is compatible with the receiving logic inputs. Check for RoHS compliance status if environmental regulations apply to the manufacturing process.

Oscillators Selection Notes

Select this component when a low-profile surface mount oscillator is required for 19.44 MHz applications. Consider the 1.8V operating voltage constraint against available power rails. Evaluate the need for an enable pin versus always-on operation. Compare physical dimensions against PCB layout constraints to ensure proper fit within the designated footprint area.

Oscillators Part Context

This oscillator belongs to the QHTF series from Mercury Electronics, a manufacturer specializing in quartz crystals since 1973. The series provides multiple hermetic ceramic packages and voltage options. The 18QHTF21 designation indicates a specific package style and voltage class within this broader product family designed for industrial and commercial timing needs.

Oscillators Replacement Considerations

Direct substitutes must match the 19.44 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility for the enable/disable function. Cross-reference with other manufacturers offering similar hermetic ceramic SMD oscillators if availability is critical.