TC74ACT245P

Overview

The TC74ACT245P is an octal bus transceiver from Toshiba's AC logic series, designed for bidirectional data transmission between two busses. It features three-state outputs and operates within a supply voltage range of 2 V to 5.5 V. The device utilizes CMOS technology to achieve high-speed operation comparable to LSTTL while maintaining low power dissipation. Data direction is controlled by a DIR input, and the device can be disabled via an enable input (G) to isolate busses. It is housed in a 20-pin DIP package suitable for through-hole mounting.

Feature Summary

• Octal bidirectional data transmission capability with three-state outputs
• Direction control via dedicated DIR input pin
• Bus isolation enabled through active-low G input
• CMOS construction ensuring low power consumption

Applications

• Two-way asynchronous communication between data busses
• Memory and memory interface systems
• High-performance microprocessor-based systems

Procurement Notes

Verify the specific suffix 'P' corresponds to the PDIP-20 package configuration as indicated in distributor listings. Confirm RoHS compliance status for the specific manufacturing batch. Ensure the operating temperature range aligns with system requirements, typically -40°C to +85°C for this series. Cross-reference the manufacturer part number with official Toshiba Semiconductor and Storage documentation to confirm current production status and availability.

Selection Notes

Select this component when an octal wide-bus interface is required with bidirectional flow control. The ACT series offers speed performance similar to LSTTL but with CMOS power benefits. Consider the 20-pin DIP package if through-hole assembly is mandated. Verify that the 2V to 5.5V supply range matches the system voltage rails. Ensure the three-state output characteristics meet the bus loading requirements of the connected devices.

Part Context

This part belongs to the TC74AC/ACT series of CMOS digital integrated circuits manufactured by Toshiba Semiconductor and Storage. The 245 designation specifically identifies it as an octal bus transceiver. This family is widely used in general-purpose digital logic applications requiring reliable data transfer across multiple lines with direction control capabilities.

Replacement Considerations

Equivalent parts include MC74AC245 and MC74ACT245 from ON Semiconductor. Other manufacturers offer compatible 74AC245 and 74ACT245 variants. Verify pin compatibility and electrical specifications before substitution.