FST3345MTCX

Overview

The FST3345MTCX is an 8-bit bus switch manufactured by ON Semiconductor, housed in a 20-lead Thin Shrink Small Outline Package (TSSOP). It operates within a supply voltage range of 4.0 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features dual output enable inputs (OE and /OE) for controlling the connection between Port A and Port B. Key electrical characteristics include a typical on-resistance of 4 Ω at 4.5 V and a propagation delay of 0.25 ns.

Feature Summary

• Provides eight-bits of high-speed CMOS TTL-compatible bus switching with minimal propagation delay.
• Features low on-resistance to connect inputs to outputs without adding significant delay or ground bounce noise.
• Includes dual output enable inputs (OE and /OE) to control the connection state between ports.

Applications

• High-speed data routing applications requiring low insertion loss.
• Systems utilizing TTL-compatible logic levels for control signals.
• Bus architectures requiring zero bounce in flow-through mode operation.

Procurement Notes

Verify the specific package type and tape-and-reel packing method when ordering. Confirm that the operating temperature range meets the environmental requirements of the target application. Ensure that input voltages remain within the recommended limits to maintain optimal performance and reliability.

Selection Notes

Select this component for applications requiring an 8-bit wide bus switch with fast switching speeds. Consider the 20-lead TSSOP package for space-constrained designs. Verify compatibility with the system's supply voltage and logic levels before integration into the circuit design.

Part Context

This device belongs to the FST series of bus switches, designed for high-speed digital signal routing. It serves as a critical interface component in systems where multiple data buses need to be selectively connected or isolated based on control signals.

Replacement Considerations

Check for updated part numbers due to Fairchild Semiconductor integration into ON Semiconductor. Verify pinout and electrical specifications against potential substitutes to ensure functional equivalence.

FAQ

How does the FST3345MTCX handle control inputs?

The device uses dual output enable inputs (OE and /OE). When /OE is LOW or OE is HIGH, the switch connects Port A to Port B. When /OE is HIGH and OE is LOW, the switch disconnects the ports.

What is the maximum supply voltage for the FST3345MTCX?

The recommended operating supply voltage (VCC) ranges from 4.0 V to 5.5 V.