18QHTF21-7.3828-OE

Overview

The 18QHTF21-7.3828-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 7.3828 MHz. It utilizes LVCMOS output logic and supports a supply voltage range that includes 1.8V and 3.3V configurations. The device features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals in space-constrained electronic systems.

Feature Summary

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

Applications

• General purpose clock signal generation
• Embedded system timing references
• Consumer electronics internal clocks

Procurement Notes

Verify the specific supply voltage requirement (1.8V or 3.3V) against your circuit design before procurement, as datasheets may list multiple voltage variants within the same series. Confirm the exact pinout and thermal specifications for the 4-SMD package to ensure proper PCB layout. Request the official manufacturer datasheet to validate frequency stability and load capacitance requirements for your specific application environment.

Selection Notes

Select this model when a low-profile 2.0x1.6mm footprint is required for 7.3828 MHz timing. Ensure the host circuit supports LVCMOS logic levels and provides the necessary enable signal if power saving is needed. Compare against other Mercury H21/H22 series oscillators if different frequencies or package sizes are acceptable for the design constraints.

Part Context

This part belongs to the Mercury Electronics SMD oscillator family, which specializes in quartz-based frequency control products. The company has decades of experience in Taiwan's crystal industry. The 18QHTF21 series typically offers standard performance characteristics suitable for general commercial and industrial applications, balancing size, cost, and reliability.

Replacement Considerations

Direct substitutes include other 7.3828 MHz XO models from Mercury Electronics with identical 4-SMD 2.0x1.6mm footprints and LVCMOS outputs. Verify that any replacement maintains the same enable/disable pin configuration and supply voltage tolerance to ensure pin-to-pin compatibility without circuit modification.