MC74ACT245DTR2G

Overview

The MC74ACT245DTR2G is an octal bidirectional transceiver with 3-state inputs and outputs, manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V. The device features non-inverting buffers with TTL-compatible inputs and provides a current sinking capability of 24 mA at both A and B ports. Propagation delay is typically 4.0 ns at 5.0 V. It is housed in a TSSOP-20 package.

Feature Summary

• TTL-compatible inputs for direct interface with standard logic
• Bidirectional data path controlled by Transmit/Receive input
• High current drive capability at both A and B ports

Applications

• Bus-oriented applications requiring high-speed data transfer
• Memory address driving systems
• General-purpose bidirectional bus buffering

Procurement Notes

Verify the specific ordering suffix 'DTR2G' corresponds to the TSSOP-20 tape and reel packaging configuration. Confirm that the procurement matches the ACT series specifications, particularly the 4.5 V to 5.5 V operating voltage range and TTL input compatibility, rather than the AC series parameters.

Selection Notes

Select this component when TTL-compatible inputs are required alongside high-speed performance. Ensure the application environment supports the specified 4.5 V to 5.5 V supply voltage. Consider the TSSOP-20 package constraints for thermal management and board space requirements compared to SOIC alternatives.

Part Context

This part belongs to the MC74AC245/MC74ACT245 family of octal bidirectional transceivers. The ACT variant specifically adds TTL-compatible input thresholds while maintaining the high-speed characteristics of the AC series. It serves as a bridge between different logic families in mixed-voltage systems.

Replacement Considerations

MC74ACT245DWG (SOIC-20), MC74ACT245DWR2G (SOIC-20 Tape & Reel). Verify pinout and electrical specifications match before substitution.