MC74HCT245ADTR2

Overview

The MC74HCT245ADTR2 is an octal bus transceiver manufactured by onsemi, belonging to the HCT logic series. It features 3-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a propagation delay of 30 ns and supports low-level output currents of 7.2 mA and high-level output currents of -7.2 mA. It utilizes a TSSOP-20 surface-mount package and functions as a non-inverting transceiver for bidirectional data communication between buses.

Feature Summary

• Octal 3-state noninverting bus transceiver architecture
• LSTTL compatible input levels for TTL/NMOS interfacing
• Bidirectional direction control for asynchronous communication

Applications

• Interfacing TTL or NMOS outputs to High Speed CMOS inputs
• Level conversion between different logic families
• Two-way asynchronous communication between data buses

Procurement Notes

Verify the specific suffix ADTR2 against the official datasheet to confirm the TSSOP-20 packaging and reel quantity specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and current production status before procurement.

Selection Notes

Select this component when interfacing between TTL-compatible sources and CMOS destinations requiring high drive capability. The HCT series ensures compatibility with standard 5V logic systems while offering improved speed over older LS variants. Consider the TSSOP-20 package for space-constrained surface-mount designs requiring eight channels of bidirectional data transfer.

Part Context

This device is part of the MC74HCT245A family, which serves as a pinout-compatible replacement for the LS245. It is designed for applications requiring robust signal integrity and noise immunity in digital systems. The HCT technology combines the speed of HMOS with the compatibility of LSTTL inputs, making it suitable for general-purpose digital logic applications.

Replacement Considerations

MC74HCT245ADT

FAQ

What is the primary function of the Direction control pin?

The Direction control pin determines whether data flows from port A to port B or from port B to port A.

How does the Output Enable pin operate?

The Output Enable pin is active-low and places the I/O ports into high-impedance states when activated.