MC74AC245MG

Overview

The MC74AC245MG is an octal bidirectional transceiver with 3-state outputs from the onsemi 74AC logic family. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient temperature range of -40°C to +85°C. The device features non-inverting buffers with A and B ports capable of sourcing or sinking 24 mA. Propagation delay is typically 8.5 ns at 5.0 V with a 50 pF load, while maximum quiescent supply current is 80.0 µA.

Feature Summary

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

Applications

• Bus-oriented communication systems
• Memory and memory interface control
• Driving capacitive loads across buses

Procurement Notes

Verify that the specific suffix 'MG' corresponds to the standard SOIC-20W (DW) or TSSOP-20 (DT) package variants listed in the official ordering information. Confirm RoHS compliance status and moisture sensitivity level requirements before procurement. Ensure the component matches the exact pinout and marking specifications defined in the datasheet.

Selection Notes

Select this component when designing systems requiring wide voltage operation between 2.0 V and 6.0 V. It is suitable for applications needing high current drive capabilities without external buffering. Consider the 74ACT variant if TTL-compatible inputs are required instead of CMOS levels.

Part Context

This part belongs to the MC74AC245/74ACT245 series of octal bidirectional transceivers manufactured by onsemi. It is designed for general-purpose digital logic applications where bus orientation and high drive strength are necessary. The AC series offers wider operating voltage ranges compared to standard 5V-only logic families.

Replacement Considerations

MC74AC245DWG

FAQ

What determines the direction of data flow?

The Transmit/Receive (T/R) input determines the direction. Active-HIGH enables data from A to B, while active-LOW enables data from B to A.

How does the Output Enable input function?

When the Output Enable (OE) input is HIGH, both A and B ports are disabled and placed in a High-Z state.