FST3306MTCX

Overview

The FST3306MTCX is a 2-bit ultra high-speed CMOS FET bus switch manufactured by onsemi. It features TTL-compatible active LOW control inputs and overvoltage tolerant logic. The device provides minimal propagation delay and zero bounce in flow-through mode. It operates within a supply voltage range of 4.0V to 5.5V and an ambient temperature range of -40°C to +85°C. The typical on-resistance is 3Ω at 5.0V VCC, with a maximum of 7Ω under specific conditions. The package is an 8-lead Thin Shrink Small Outline Package (TSSOP).

Feature Summary

• Ultra high-speed CMOS FET technology for minimal propagation delay.
• Active LOW control inputs compatible with TTL logic levels.
• Control inputs are overvoltage tolerant up to 5.5V independent of VCC.
• Zero bounce operation in flow-through mode.

Applications

• High-speed data bus switching applications.
• Portable systems requiring low power consumption.
• Consumer electronics utilizing 3.3V or 5V logic interfaces.

Procurement Notes

Verify the component authenticity against the official datasheet specifications. Confirm the package type matches the 8-lead TSSOP outline. Ensure the operating voltage and temperature ranges align with system requirements. Check for RoHS compliance documentation if required by the manufacturing process. Validate that the ordering code suffix corresponds to the tape and reel configuration.

Selection Notes

Select this component for designs requiring bidirectional bus switching with low on-resistance. Consider the 2-bit organization for compact signal routing solutions. Evaluate the overvoltage tolerance of control inputs for mixed-voltage environments. Assess the power dissipation limits relative to the thermal resistance of the TSSOP package. Verify compatibility with the target logic family voltage levels.

Part Context

This device belongs to the FST series of bus switches, designed for high-speed digital signal transmission. It serves as a bridge between different logic domains, allowing flexible interconnection of buses. The FST3306 specifically addresses the need for low-power, high-performance switching in portable and consumer devices.

Replacement Considerations

Consult official replacement lists for equivalent 2-bit bus switches. Verify pinout compatibility and electrical characteristics before substitution. Ensure the alternative device meets the same voltage and temperature specifications.

FAQ

What is the function of the BE pin?

The Bus Enable (BE) pin controls the switch state. When BE is LOW, Port A is connected to Port B. When BE is HIGH, the switch is open, creating a high-impedance state between the ports.

Are the control inputs compatible with 5V logic?

Yes, the control inputs are TTL-compatible and tolerate voltages up to 5.5V, independent of the VCC supply voltage.