MC74AC245DTG

Overview

The MC74AC245DTG is an octal bidirectional transceiver with three-state outputs manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient operating temperature from -40°C to +85°C. The device features eight non-inverting buffers with A and B ports capable of sourcing or sinking 24 mA. Propagation delay is typically 8.5 ns at 3.3 V and 6.5 ns at 5.0 V under a 50 pF load. It utilizes a TSSOP-20 package.

Feature Summary

• Bidirectional data path controlled by Transmit/Receive input
• Three-state outputs for bus-oriented applications
• High current drive capability of 24 mA at both ports

Applications

• Bus-oriented data transmission systems
• Memory interface circuits
• Digital signal routing between logic blocks

Procurement Notes

Verify the specific suffix DTG corresponds to the TSSOP-20 package configuration as documented in the ordering information section. Confirm that the Pb-Free designation matches environmental compliance requirements for the target assembly process. Ensure the component marking aligns with the specified case outline dimensions.

Selection Notes

Select this component when designing systems requiring high-speed bidirectional data transfer with significant current drive capabilities. The AC series offers faster propagation delays compared to standard variants, suitable for higher frequency bus architectures. Verify that the 2.0 V to 6.0 V operating range accommodates the system's power supply rails and noise margins.

Part Context

This part belongs to the MC74AC245 family of octal bus transceivers. It shares functional similarities with the MC74ACT245 but lacks TTL-compatible inputs, relying instead on CMOS input thresholds. The DTG suffix specifically denotes the TSSOP-20 surface-mount package variant within the broader product line.

Replacement Considerations

MC74AC245DWG (SOIC-20 package)