74FST3345DTR2

Overview

The onsemi 74FST3345DTR2 is an 8-bit high-performance bus switch designed for CMOS and TTL compatibility. It operates within a supply voltage range of 4.0 V to 5.5 V, featuring extremely low on-resistance (RON) and negligible propagation delay. The device incorporates two output enable pins (OE1 and OE2) to control data flow between Bus A and Bus B. It provides differential switching capabilities with nearly zero standby current and eliminates circuit bounce. Packaged in a TSSOP-20 form factor, it supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Provides bidirectional 8-bit data switching with minimal insertion loss
• Features dual independent output enable controls for flexible routing
• Maintains signal integrity by eliminating ground bounce and circuit noise
• Ensures seamless integration through TTL and CMOS compatible logic levels

Applications

• High-speed parallel data bus interconnects
• Memory module address and data line switching
• System board level multiplexing applications
• Portable equipment requiring low power consumption

Procurement Notes

Verify the specific ordering suffix 'DTR2' corresponds to the TSSOP-20 package configuration and tape-and-reel shipping format. Confirm RoHS compliance status and Pb-Free manufacturing details directly with the manufacturer or authorized distributors prior to procurement. Ensure the component meets all environmental and material declarations required for your specific assembly process.

Selection Notes

Select this component when designing systems requiring fast, low-latency switching between 4V and 5.5V logic domains. It is suitable for applications demanding high drive capability with minimal signal distortion. Consider its pin-for-pin compatibility with other FST3345 variants if space constraints require alternative package options like SOIC-20 or QSOP-20.

Part Context

This device belongs to the 74FST series of high-speed bus switches manufactured by onsemi. It is engineered to replace older generation switching technologies by offering superior speed and lower power dissipation. The part serves as a critical interface element in digital systems where reliable data path selection is essential without introducing significant timing skew.

Replacement Considerations

Public confirmed substitutes include the QS3345, FST3345, and CBT3345. These components offer pin-for-pin compatibility, allowing for direct replacement in existing designs without schematic modifications.