MC74ACT245DTEL

Overview

The MC74ACT245DTEL is an octal bidirectional transceiver manufactured by Motorola, belonging to the ACT CMOS logic family. It features eight non-inverting buffers with three-state outputs designed for bus-oriented applications. The device operates within a voltage range of 4.5 V to 5.5 V and supports data transmission in both directions controlled by a Transmit/Receive input. It provides high current sinking capability at both A and B ports, ensuring robust signal integrity across digital buses.

Feature Summary

• Octal bidirectional data path supporting asynchronous communication between data buses
• Three-state outputs allowing connection to common bus lines without interference
• TTL-compatible input levels enabling direct interfacing with TTL or NMOS devices

Applications

• Bus-oriented memory and I/O mapping systems
• Asynchronous two-way communication between data buses
• Level conversion for interfacing TTL/NMOS outputs to High Speed CMOS inputs

Procurement Notes

Verify the manufacturer origin as Motorola or its successor entities due to corporate acquisitions. Confirm the TSSOP-20 package designation matches the specific DTEL suffix requirements. Ensure the component meets the specified operating temperature range and voltage specifications for the target application environment before integration.

Selection Notes

Select this component when an octal bidirectional transceiver with TTL-compatible inputs is required. It is suitable for applications needing high current drive capabilities on both ports. Consider the ACT series speed and power characteristics compared to HC or AC variants based on system timing constraints and power budget requirements.

Part Context

This part belongs to the 74ACT series of high-speed silicon-gate CMOS logic devices. It shares pinout compatibility with LS, ALS, HC, and HCT families, facilitating drop-in replacements in existing designs. The device is intended for general-purpose digital logic applications requiring reliable bidirectional data transfer.

Replacement Considerations

Compatible substitutes include MC74AC245DTEL and MC74HCT245DTEL. Verify voltage compatibility and input threshold levels when substituting with HC or AC variants.