FST3384MTCX

Overview

The FST3384MTCX is a 10-bit low power bus switch manufactured by onsemi, housed in a 24-lead Thin Shrink Small Outline Package (TSSOP). It features two independent 5-bit switches with separate bus enable signals. The device operates within a supply voltage range of 4.0V to 5.5V and supports an operating temperature from -40°C to +85°C. Key electrical parameters include a typical on-resistance of 4Ω at VCC=4.5V and a quiescent supply current of 3µA.

Feature Summary

• Provides high-speed CMOS TTL-compatible bus switching with minimal propagation delay.
• Features ultra-low power consumption with typical ICC below 0.1 µA.
• Ensures zero ground bounce noise in flow-through mode operation.

Applications

• High-speed data bus interconnects
• Portable battery-powered systems
• Consumer electronics requiring low power dissipation

Procurement Notes

Verify the specific package variant against the ordering code suffix. Confirm that the application environment remains within the specified voltage and temperature limits. Ensure unused control inputs are tied to defined logic levels to prevent floating states. Validate all operational parameters for the specific end-use case before final integration.

Selection Notes

Select this component when designing circuits requiring low insertion loss and minimal signal distortion across wide buses. The dual 5-bit architecture allows flexible partitioning of data lines. Consider the TSSOP package constraints for board space and thermal management requirements relative to other available packages.

Part Context

This part belongs to the Fairchild Switch family, which utilizes proven switch technology previously found in products like the 74LVX3L384. It serves as a direct replacement or upgrade path for legacy bus switch designs requiring improved power efficiency and signal integrity in modern electronic systems.

Replacement Considerations

Equivalent parts include the FST3384WM and FST3384QSC, which share identical functionality but differ in physical packaging dimensions and pinout compatibility.

FAQ

How is the FST3384MTCX organized internally?

The device is organized as two independent 5-bit switches, each controlled by a separate bus enable (OE) signal.

What is the behavior of the switch when OE is HIGH?

When the OE signal is HIGH, the switch enters a HIGH-Z state, disconnecting Port A from Port B.