74FST3245DWR2

Overview

The onsemi 74FST3245DWR2 is an 8-bit bus switch designed for high-performance applications. It operates within a supply voltage range of 4.0 V to 5.5 V and exhibits CMOS TTL compatibility. The device features extremely low on-resistance (RON) and nearly zero propagation delay, contributing negligible noise or ground bounce to the system. Port A connects to Port B when the Output Enable (OE) pin is low; otherwise, the switch remains in a high-impedance state.

Feature Summary

• Provides an 8-bit bidirectional switching path with minimal signal distortion
• Operates with control inputs compatible with both TTL and CMOS logic levels
• Maintains nearly zero standby current consumption during operation
• Ensures pin-for-pin compatibility with alternative FST3245 family devices

Applications

• High-speed data bus routing in digital systems
• Signal translation between different logic domains
• System board interconnects requiring low insertion loss

Procurement Notes

Verify that the specific order number matches the required package suffix. Confirm the tape and reel quantity aligns with manufacturing requirements. Ensure the operating temperature range meets the application's environmental specifications. Check for lead-free compliance if soldering processes require it. Validate input voltage limits against the system power rails.

Selection Notes

Select this component when low on-resistance and high-speed switching are critical. It is suitable for systems requiring CMOS TTL compatibility across the specified voltage range. Consider the SOIC-20 package dimensions for PCB layout constraints. Evaluate the need for OE control functionality to manage bus states effectively.

Part Context

This device belongs to the 74FST series of bus switches manufactured by onsemi. It is part of a family offering high-speed, low-power solutions for digital signal routing. The 74FST3245 variant specifically provides eight independent switching channels controlled by a single enable pin.

Replacement Considerations

The datasheet confirms pin-for-pin compatibility with QS3245, FST3245, and CBT3245 devices. Verify electrical characteristics match before substituting. Ensure the replacement device supports the same voltage and temperature ranges.