MC74ACT245DWG

Overview

The MC74ACT245DWG is an octal bidirectional transceiver with 3-state outputs manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs. The device provides non-inverting data transfer between Side A and Side B ports, controlled by Transmit/Receive (T/R) and Output Enable (OE) signals. It supports a maximum propagation delay of 9.0 ns at 5.0 V and delivers output currents of ±24 mA. Packaged in a SOIC-20W format, it functions reliably across temperatures from -40°C to +85°C.

Feature Summary

• Bidirectional data path controlled by dedicated direction enable input
• TTL-compatible input logic levels for direct interface compatibility
• High current sinking and sourcing capability at both A and B ports
• Three-state outputs allowing safe bus line sharing

Applications

• Bus-oriented applications requiring high-speed data transfer
• Memory and memory interface systems
• Clock drivers and buffer circuits
• Control signal routing in digital logic systems

Procurement Notes

Verify the specific ordering suffix 'DWG' corresponds to the SOIC-20 package and lead-free status. Confirm that the application environment remains within the specified 4.5 V to 5.5 V supply voltage limits. Ensure thermal management accounts for the package's thermal resistance characteristics during operation. Validate that input signals do not exceed the recommended DC input voltage ranges relative to ground.

Selection Notes

Select this component when TTL-compatible inputs are required alongside AC-level performance speeds. The DWG suffix indicates a wide-body SOIC package suitable for surface mount assembly. Consider the ±24 mA drive strength for driving moderate capacitive loads without external buffering. Verify that the 3-state functionality aligns with the system's bus arbitration requirements.

Part Context

This part belongs to the MC74AC245/MC74ACT245 family of octal bus transceivers. The ACT variant specifically integrates TTL-compatible input thresholds while maintaining AC switching speeds. It serves as a bridge between different logic families or buffers high-capacitance buses in complex digital architectures.

Replacement Considerations

MC74AC245DWG shares the same physical package but lacks TTL-compatible inputs. SN74ACT245DWR is a functional equivalent from Texas Instruments in a similar SOIC-20 package.