MC74HCT245AFELG

Overview

The MC74HCT245AFELG is an octal 3-state noninverting bus transceiver manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and features LSTTL compatible inputs. The device provides bidirectional data communication between buses with an active-low output enable pin for high-impedance states. It utilizes a 20-SOIC surface-mount package and supports a propagation delay of 30 ns. The component is designed for asynchronous two-way communication and includes drive capability for 15 LSTTL loads.

Feature Summary

• Octal 3-state noninverting transceiver architecture
• LSTTL compatible input levels for TTL/NMOS interfacing
• Bidirectional data flow control via direction pin
• Active-low output enable for high-impedance state management

Applications

• Two-way asynchronous communication between data buses
• Level conversion for interfacing TTL or NMOS outputs to High Speed CMOS inputs
• Bus-oriented memory and command decoders

Procurement Notes

Verify the specific suffix 'FELG' against the manufacturer's current datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with 4.5 V to 5.5 V supply rails. Confirm RoHS compliance status as defined in the latest environmental documentation. Validate that the 20-SOIC footprint matches the target PCB design constraints.

Selection Notes

Select this component when LSTTL-compatible inputs are required for driving CMOS buses. It serves as a direct pinout replacement for LS245 devices. Consider the 30 ns propagation delay for timing-critical applications. The 15 LSTTL load drive capability ensures robust signal integrity across standard logic families.

Part Context

This part belongs to the 74HCT series of high-speed CMOS logic devices. It shares functional similarities with other octal bus transceivers but is distinguished by its HCT input compatibility. The device is part of onsemi's portfolio of standard logic ICs designed for general-purpose digital applications.

Replacement Considerations

MC74HCT245A

FAQ

Is the MC74HCT245AFELG pin-compatible with the 74LS245?

Yes, the device is identical in pinout to the LS245.

What is the function of the Direction control pin?

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